# yourstand.art - Private Web Utilities for Code, Documents, Data & Growth

> Deterministic, zero-server utilities for engineers, founders, and remote teams executed 100% in browser memory. Zero cloud roundtrips, zero telemetry leaks, and instant shareable URL state (#z=).

## Core Architecture & Privacy Guarantees
- **100% In-Browser Execution**: Every parser, compiler, formatter, cryptographic signer, and schema generator runs locally in JavaScript/WebAssembly.
- **Zero Network Egress**: Payloads (JSON, JWTs, SQL schemas, EXIF photos, Docker commands, CSP headers) never leave the browser tab.
- **Shareable Compressed State**: Tools support `#z=` URL hash compression and `yst:pipe-payload` cross-tool piping.

## Interactive Utilities (192 Tools)
- [JSON Formatter](https://yourstand.art/json-formatter): Pretty-print with 2, 3, or 4-space indent, or minify to one line. Deep key sorting. (Category: format, Badge: Format)
- [JSON Repair](https://yourstand.art/json-repair): Auto-fix broken JSON, Python dicts, trailing commas, comments, and unquoted keys. (Category: format, Badge: Repair)
- [JSON Validator](https://yourstand.art/json-validator): Syntax-only validation with exact line, column, and character offset pinpointing. (Category: format, Badge: Validate)
- [JSON Schema Validator](https://yourstand.art/json-schema-validator): Validate payload data against Draft-07 schemas with JSONPath errors. (Category: format, Badge: Schema)
- [Diff Checker & Compare](https://yourstand.art/check-diff): Compare JSON, YAML, code, or text side-by-side with full line & character diffs. (Category: format, Badge: Diff)
- [JSONPath Finder](https://yourstand.art/jsonpath): Interactive tree explorer. Click any node to copy JS dot, JSONPath, or jq paths. (Category: format, Badge: Path)
- [Regex Tester](https://yourstand.art/regex-tester): Test JavaScript Regular Expressions with live match highlighting and group extraction. (Category: format, Badge: Regex)
- [JWT Decoder](https://yourstand.art/jwt-decoder): Decode JSON Web Tokens instantly. Inspect claims, header, and expiration times. (Category: crypto, Badge: JWT)
- [JWT Signer & Verifier](https://yourstand.art/jwt-signer): Create, sign, and verify HMAC JSON Web Tokens (HS256, HS384, HS512) via Web Crypto API. (Category: crypto, Badge: JWT)
- [KeyCode & Event Inspector](https://yourstand.art/keycode-inspector): Inspect JavaScript keyboard event properties, event.key, event.code, and modifier keys in real-time. (Category: format, Badge: Keyboard)
- [Unix Timestamp Converter](https://yourstand.art/timestamp-converter): Convert Unix epoch timestamps to ISO 8601, UTC, and local time with live ticking clock. (Category: convert, Badge: Time)
- [JSON to Zod & Valibot](https://yourstand.art/json-to-zod): Generate Zod v3 and Valibot validation schemas with type inference from JSON. (Category: generate, Badge: Zod)
- [Protobuf Decoder (.pb)](https://yourstand.art/protobuf-decoder): Decode binary Protobuf wire data to JSON, .proto schema, and .pbtxt with byte wire inspector. (Category: convert, Badge: Proto)
- [cURL to Code](https://yourstand.art/curl-to-code): Convert cURL commands to Fetch, Axios, Python HTTPX, Go, and Rust API clients. (Category: convert, Badge: cURL)
- [Code to Image Generator](https://yourstand.art/code-to-image): Create presentation-ready code snippet cards in PNG or SVG with macOS window frames. (Category: media, Badge: Image)
- [CSS Fluid clamp() Calculator](https://yourstand.art/css-clamp-calculator): Calculate fluid clamp() formulas for responsive typography and spacing with live slider. (Category: generate, Badge: CSS)
- [Git Scenario Solver](https://yourstand.art/git-command-generator): Interactive visual Git solver. Undo commits, recover reflogs, squash, and rename branches. (Category: devops, Badge: Git)
- [SVG Optimizer & Minifier](https://yourstand.art/svg-optimizer): Minify SVG vectors, strip Figma & Illustrator metadata, and round path coordinates. (Category: media, Badge: SVG)
- [JSON to YAML](https://yourstand.art/json-to-yaml): Convert JSON trees to clean, indented YAML for Kubernetes, Compose, and configs. (Category: convert, Badge: YAML)
- [YAML to JSON](https://yourstand.art/yaml-to-json): Parse YAML configs, manifests, or snippets to clean formatted JSON. (Category: convert, Badge: JSON)
- [CSV to JSON](https://yourstand.art/csv-to-json): Deterministic CSV parser with custom delimiters, header toggles, and auto-typing. (Category: convert, Badge: CSV)
- [JSON to CSV](https://yourstand.art/json-to-csv): Export array of JSON objects to RFC-4180 CSV with custom delimiters. (Category: convert, Badge: CSV)
- [Mock Data & Schema Faker](https://yourstand.art/mock-data-generator): Generate realistic mock datasets (Users, Products, Telemetry) in JSON, CSV, and SQL. (Category: generate, Badge: Faker)
- [JSON to Query String](https://yourstand.art/json-to-query-string): URL encode deep objects with bracket, dot, or JSON nesting notations. (Category: convert, Badge: URL)
- [Query String to JSON](https://yourstand.art/query-string-to-json): Parse URL query parameters, full URLs, and bracket structures to JSON. (Category: convert, Badge: Query)
- [JSON to Python Dict / List](https://yourstand.art/json-to-dict-list): Render JSON as a Python dict/list literal. null → None, true → True, false → False. (Category: convert, Badge: Python)
- [Python Dict / List to JSON](https://yourstand.art/dict-list-to-json): Convert Python dict/list literals to JSON. Handles None, True, False, and single quotes. (Category: convert, Badge: Python)
- [JSON to TypeScript](https://yourstand.art/json-to-typescript): Generate robust TypeScript interfaces and types with optional/readonly support. (Category: generate, Badge: TypeScript)
- [JSON to Go Struct](https://yourstand.art/json-to-go): Generate idiomatic Go structs with json tags and nested struct definitions. (Category: generate, Badge: Go)
- [JSON to Python](https://yourstand.art/json-to-python): Compile JSON to Python @dataclass, TypedDict, or valid literal source code. (Category: generate, Badge: Python)
- [JSON to Django Model](https://yourstand.art/json-to-django): Draft clean models.Model schemas with field lengths and nullability hints. (Category: generate, Badge: Django)
- [JSON to SQL](https://yourstand.art/json-to-sql): Transform JSON filters to parameterized WHERE or objects to INSERT statements. (Category: generate, Badge: SQL)
- [JSON to GraphQL Schema](https://yourstand.art/json-to-graphql): Generate GraphQL types, query schemas, and mutation inputs from JSON payloads. (Category: generate, Badge: GraphQL)
- [HTML to JSX / React](https://yourstand.art/html-to-jsx): Convert raw HTML to clean React JSX/TSX with class to className, styles, and self-closing tags. (Category: generate, Badge: React/JSX)
- [SVG to JSX / React](https://yourstand.art/svg-to-jsx): Convert raw SVG code to clean React JSX/TSX components with live vector preview and currentColor styling. (Category: generate, Badge: SVG)
- [cURL to JSON / Code](https://yourstand.art/curl-to-json): Extract JSON payloads from cURL and generate JS Fetch, Python, and Go code. (Category: convert, Badge: cURL)
- [URL Parser & Builder](https://yourstand.art/url-parser): Deconstruct URLs and edit query parameters interactively with 2-way real-time synchronization. (Category: convert, Badge: URL)
- [Postman to OpenAPI](https://yourstand.art/postman-to-swagger): Convert a Postman Collection v2.1 JSON to an OpenAPI 3.0 YAML spec. Extracts endpoints, params, and request bodies. (Category: generate, Badge: OpenAPI)
- [OpenAPI to Postman](https://yourstand.art/swagger-to-postman): Convert an OpenAPI 3.0 JSON or YAML spec to a Postman Collection v2.1 with folders, bodies, and example responses. (Category: generate, Badge: Postman)
- [Docker Compose to K8s](https://yourstand.art/compose-to-k8s): Convert Docker Compose YAML services to Kubernetes Deployment and Service manifests. (Category: devops, Badge: Kubernetes)
- [Chmod Permissions Calculator](https://yourstand.art/chmod-calculator): Calculate numeric octal and symbolic Linux file permissions with visual rwx checkboxes. (Category: devops, Badge: Chmod)
- [Subnet & CIDR Calculator](https://yourstand.art/subnet-calculator): Calculate IPv4 CIDR subnet masks, network & broadcast IPs, and usable host ranges. (Category: devops, Badge: Subnet)
- [Cron Expression Parser](https://yourstand.art/cron-parser): Convert crontab expressions into plain English schedules and calculate next execution dates. (Category: devops, Badge: Cron)
- [HTTP Status Reference](https://yourstand.art/http-status): Complete RFC reference directory of HTTP response status codes and security/caching headers. (Category: devops, Badge: HTTP)
- [Base64 Converter](https://yourstand.art/base64-converter): Encode & decode Base64 with full UTF-8 and URL-safe support. Instant 2-way swap. (Category: crypto, Badge: Base64)
- [Base64 to Image Previewer](https://yourstand.art/base64-to-image): Decode Base64 strings to images, inspect dimensions and file size, and download binary images. (Category: crypto, Badge: Image)
- [X.509 Certificate Decoder](https://yourstand.art/cert-decoder): Decode SSL/TLS X.509 certificates and CSRs. Inspect SANs, validity, issuer, and SHA-256 fingerprints. (Category: crypto, Badge: SSL/Cert)
- [Hash Generator](https://yourstand.art/hash-generator): MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512 and HMAC, client-side and instant. (Category: crypto, Badge: Hash)
- [UUID & NanoID Generator](https://yourstand.art/uuid-generator): Generate UUID v4, UUID v7, NanoID, and CUID in bulk. Fast, secure, and private. (Category: generate, Badge: UUID)
- [UUID Hyphen Converter](https://yourstand.art/uuid-converter): Add or remove hyphens from UUIDs. Convert between compact 32-char hex and standard 8-4-4-4-12 canonical format. (Category: generate, Badge: UUID)
- [Color & Contrast Converter](https://yourstand.art/color-converter): Convert HEX, RGB, HSL color models and check WCAG AA/AAA contrast ratios. (Category: convert, Badge: WCAG)
- [Jinja Renderer](https://yourstand.art/jinja-renderer): Real-time Jinja2 sandbox with filters, loops, and zero server execution. (Category: playgrounds, Badge: Jinja)
- [HTML / CSS / JS Playground](https://yourstand.art/html-playground): Real-time client-side frontend sandbox with live iframe rendering, console logging, and instant export. (Category: playgrounds, Badge: HTML/JS)
- [JavaScript / TypeScript Playground](https://yourstand.art/js-playground): Execute modern ES2024 and TypeScript in sandboxed thread. Live console logs and execution benchmarks. (Category: playgrounds, Badge: JS/TS)
- [Python Playground](https://yourstand.art/python-playground): Execute real Python 3.12 in WebAssembly (Pyodide). Standard libraries included. Zero server execution. (Category: playgrounds, Badge: Python)
- [SQLite / SQL Playground](https://yourstand.art/sql-playground): In-browser SQLite WebAssembly memory database. Run joins, window functions, and export CSV/JSON. (Category: playgrounds, Badge: SQLite)
- [Lua Playground](https://yourstand.art/lua-playground): Lightweight Lua 5.4 in WebAssembly (Fengari). Test tables, metatables, and closures. (Category: playgrounds, Badge: Lua)
- [Markdown & Mermaid Playground](https://yourstand.art/markdown-playground): Live Markdown editor with Mermaid diagrams, LaTeX math, and HTML/MD export. (Category: playgrounds, Badge: Markdown)
- [URL Encoder & Decoder](https://yourstand.art/url-encoder): Percent-encode or decode strings and full URLs. Component mode for query values, Full URI mode preserves :/?#[]@. (Category: crypto, Badge: URL)
- [Number Base Converter](https://yourstand.art/number-base-converter): Convert integers between binary, octal, decimal, hex, or any custom base 2-36. BigInt-backed for arbitrary precision. (Category: convert, Badge: Base)
- [String Case Converter](https://yourstand.art/string-case-converter): Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, Sentence case, and dot.case. (Category: convert, Badge: Case)
- [Password Generator](https://yourstand.art/password-generator): Generate secure random passwords and alphanumeric tokens with crypto.getRandomValues and an entropy-based strength meter. (Category: crypto, Badge: Password)
- [Universal Unit Converter](https://yourstand.art/unit-converter): Convert Length, Weight, Temperature, Area, Volume, Speed, Data Storage, Time, Pressure, Energy, Power, Angle, Frequency, and Data Transfer with live all-units matrix. (Category: convert, Badge: Units)
- [QR Code Generator](https://yourstand.art/qr-code-generator): Generate QR codes from text or URLs with adjustable error correction, size, and colors. PNG download. (Category: generate, Badge: QR)
- [Image Compressor](https://yourstand.art/image-compressor): Compress images to JPEG with a quality slider. Before/after file size and percentage saved. (Category: media, Badge: Compress)
- [Image Resizer](https://yourstand.art/image-resizer): Resize images to exact pixel dimensions or presets, with aspect-ratio lock. (Category: media, Badge: Resize)
- [Image Format Converter](https://yourstand.art/image-format-converter): Convert images between PNG, JPEG, and WebP with a quality slider for lossy formats. (Category: media, Badge: Format)
- [Favicon Generator](https://yourstand.art/favicon-generator): Generate every favicon size (16 to 512px) from one image, plus manifest JSON and head tags. (Category: media, Badge: Favicon)
- [.gitignore Generator](https://yourstand.art/gitignore-generator): Generate .gitignore files for Node, Python, Go, Rust, Java, macOS, Docker, Terraform and more. Merged, de-duped. (Category: devops, Badge: Git)
- [Commit Message Generator](https://yourstand.art/commit-message-generator): Build spec-correct Conventional Commits messages with type, scope, body, and breaking-change footers. (Category: devops, Badge: Git)
- [Timezone Converter](https://yourstand.art/timezone-converter): Convert a date/time across IANA timezones and compare 3-4 zones side by side. (Category: convert, Badge: Time)
- [Age Calculator](https://yourstand.art/age-calculator): Exact calendar age in years, months, and days, plus total days, weeks, and next-birthday countdown. (Category: convert, Badge: Date)
- [Word Counter](https://yourstand.art/word-counter): Live word, character, sentence, and paragraph counts, reading time, and top-10 frequent words. (Category: format, Badge: Text)
- [HTTP Header Parser](https://yourstand.art/http-header-parser): Parse raw HTTP headers into a table: flags Set-Cookie, breaks out Cache-Control & CSP, and checks for HSTS. (Category: format, Badge: HTTP)
- [HAR File Viewer](https://yourstand.art/har-viewer): Upload or paste a .har file and inspect every request: method, status, size, timing, full headers and body. (Category: format, Badge: HAR)
- [HAR to OpenAPI](https://yourstand.art/har-to-openapi): Generate a minimal OpenAPI 3.0 YAML skeleton from a .har file, grouped by path and method. (Category: convert, Badge: HAR)
- [HAR to Markdown](https://yourstand.art/har-to-markdown): Convert a .har file into a readable Markdown summary for PR descriptions and bug reports. (Category: convert, Badge: HAR)
- [API Tester](https://yourstand.art/api-tester): Send real GET/POST/PUT/PATCH/DELETE requests from your browser and inspect the response. (Category: format, Badge: API)
- [RSA Key Pair Generator](https://yourstand.art/rsa-key-generator): Generate RSA-OAEP or RSASSA-PKCS1-v1_5 key pairs (2048/3072/4096-bit) as PEM. Pure Web Crypto, nothing persisted. (Category: crypto, Badge: RSA)
- [Bcrypt Hash Generator](https://yourstand.art/bcrypt-generator): Hash passwords with bcrypt at a configurable cost factor, or verify a password against an existing hash. (Category: crypto, Badge: Bcrypt)
- [CSS Gradient Generator](https://yourstand.art/gradient-generator): Build linear, radial, and conic CSS gradients visually with live preview and copyable CSS. (Category: generate, Badge: Gradient)
- [Color Palette Generator](https://yourstand.art/color-palette-generator): Generate a 5-swatch palette from one color via complementary, analogous, triadic, monochromatic, or split-complementary harmony. (Category: generate, Badge: Palette)
- [Avatar Generator](https://yourstand.art/avatar-generator): Generate a deterministic geometric identicon avatar from any text seed. Same input, same avatar, every time. (Category: media, Badge: Avatar)
- [JSON Flattener](https://yourstand.art/json-flattener): Flatten nested JSON into dot/bracket keys, or unflatten back. Configurable delimiter and array notation. (Category: convert, Badge: Flatten)
- [XML to JSON Converter](https://yourstand.art/xml-to-json): Convert XML to JSON and back. Attributes under @attributes, text under #text, repeats become arrays. (Category: convert, Badge: XML)
- [JSON to Markdown](https://yourstand.art/json-to-markdown): Convert a JSON array to a Markdown table, or any JSON to a nested bullet list. (Category: convert, Badge: Markdown)
- [JSON to Table](https://yourstand.art/json-to-table): Live HTML table preview from JSON. Copy as Markdown, TSV, or raw HTML. (Category: playgrounds, Badge: Table)
- [Lorem Ipsum Generator](https://yourstand.art/lorem-ipsum-generator): Generate classic Lorem Ipsum placeholder text by word, sentence, or paragraph count. (Category: generate, Badge: Lorem)
- [CSS Flexbox Generator](https://yourstand.art/css-flexbox-generator): Visual flexbox container builder (direction, justify, align, wrap, gap) with live preview and copy-ready CSS. (Category: generate, Badge: CSS)
- [PDF Merger](https://yourstand.art/pdf-merger): Combine multiple PDFs into one file, in any order you choose, entirely in your browser. (Category: media, Badge: PDF)
- [PDF Splitter](https://yourstand.art/pdf-splitter): Extract a page range or split a PDF into fixed-size chunks, entirely in your browser. (Category: media, Badge: PDF)
- [Webcam Recorder](https://yourstand.art/webcam-recorder): Record webcam video with audio via MediaRecorder. Live preview, instant playback, local download. (Category: media, Badge: Webcam)
- [Speech to Text](https://yourstand.art/speech-to-text): Live speech transcription via the Web Speech API. Chrome/Edge only, multiple languages, interim + final results. (Category: playgrounds, Badge: Speech)
- [JSON Schema Generator](https://yourstand.art/json-schema-generator): Infer a Draft-07 JSON Schema from a sample JSON value: types, required fields, nested properties, array items. (Category: generate, Badge: Schema)
- [TSV to JSON](https://yourstand.art/tsv-to-json): Convert tab-separated values to JSON and back. Same engine as CSV to JSON, delimiter fixed to tab. (Category: convert, Badge: TSV)
- [JSON Lines (NDJSON) Viewer](https://yourstand.art/jsonl-viewer): Validate NDJSON line by line with per-line errors; convert to/from a single JSON array. (Category: format, Badge: NDJSON)
- [JSON to TOML](https://yourstand.art/json-to-toml): Convert JSON to TOML and back: scalars, arrays, [table] headers. Hand-written, no dependency. (Category: convert, Badge: TOML)
- [JSON to OpenAPI Schema](https://yourstand.art/json-to-openapi-schema): Infer an OpenAPI 3.0 schema object from sample JSON, ready for components.schemas. YAML or JSON output. (Category: generate, Badge: OpenAPI)
- [API Client Workspace](https://yourstand.art/api-client): Postman-class browser client for REST, GraphQL, and gRPC-Web / Connect with collections, environments, and pm.* test scripts. (Category: playgrounds, Badge: API)
- [HTML Escape & Unescape](https://yourstand.art/html-escape-unescape): Escape or unescape HTML entities using named (&), decimal (&), or hex (&) formats with optional attribute-quote encoding. (Category: convert, Badge: HTML)
- [HMAC Generator](https://yourstand.art/hmac-generator): Compute HMAC-SHA1, HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512 via Web Crypto with UTF-8, hex, and Base64 keys and outputs. (Category: crypto, Badge: HMAC)
- [Text to Binary, Hex & Octal](https://yourstand.art/text-to-binary): Convert UTF-8 text to 8-bit binary, hexadecimal, octal, or decimal byte values and decode byte streams back to text. (Category: convert, Badge: Bytes)
- [Text to NATO Alphabet](https://yourstand.art/text-to-nato-alphabet): Translate text, serial numbers, and digits to the ICAO / NATO phonetic alphabet (Alfa, Bravo, Charlie) and decode back. (Category: convert, Badge: NATO)
- [Roman Numeral Converter](https://yourstand.art/roman-numeral-converter): Convert integers 1..3999 to Roman numerals and back with strict canonical validation and step-by-step breakdown. (Category: convert, Badge: Roman)
- [Number to Words Converter](https://yourstand.art/number-to-words): Convert integers and decimals to English cardinal, ordinal (twenty-third), and currency/cheque words up to decillions. (Category: convert, Badge: Words)
- [Random String Generator](https://yourstand.art/random-string-generator): Generate unbiased random strings in bulk via crypto.getRandomValues with custom charsets, 0O1lI exclusion, and entropy display. (Category: generate, Badge: Random)
- [Array & List Sorter / Shuffler](https://yourstand.art/array-sorter-shuffler): Sort (A-Z, natural, numeric, length), deduplicate, reverse, or Fisher-Yates shuffle newline lists, CSVs, and JSON arrays. (Category: format, Badge: List)
- [Password Strength Checker](https://yourstand.art/password-strength-checker): Evaluate password entropy, pattern penalties (walks, repeats, l33t roots, years), and online/offline crack-time estimates. (Category: crypto, Badge: Security)
- [User-Agent Parser](https://yourstand.art/user-agent-parser): Extract browser, rendering engine, OS, device type (desktop/mobile/tablet/bot/CLI), and CPU architecture from User-Agent strings. (Category: format, Badge: UA)
- [PHP Unserializer & Serializer](https://yourstand.art/php-unserializer): Parse PHP serialize() strings to JSON with UTF-8 byte-length accuracy and exact byte error offsets, or serialize JSON to PHP. (Category: convert, Badge: PHP)
- [SemVer Checker & Range Calculator](https://yourstand.art/semver-checker): Validate SemVer 2.0.0 versions, evaluate npm ranges (^, ~, >=, A - B, ||), sort version lists, and compute version bumps. (Category: format, Badge: SemVer)
- [JSON Key Sorter](https://yourstand.art/json-sorter): Sort JSON object keys recursively asc/desc, optionally sort primitive or object arrays by key, and preserve indent. (Category: format, Badge: JSON)
- [JSON to XML](https://yourstand.art/json-to-xml): Convert JSON to well-formed XML with configurable root and item tags, @attribute prefix, #text key, and CDATA. (Category: convert, Badge: XML)
- [YAML Viewer & Tree Inspector](https://yourstand.art/yaml-viewer): Interactive collapsible YAML tree with JSONPath key paths, data types, search filter, and line error checks. (Category: format, Badge: YAML)
- [CSV to Markdown Table](https://yourstand.art/csv-to-markdown): Convert CSV or TSV into GitHub Flavored Markdown tables with per-column alignment, pipe escaping, and padding. (Category: convert, Badge: Markdown)
- [CSV & TSV Table Editor](https://yourstand.art/csv-editor): Editable spreadsheet grid in browser: load CSV/TSV, add/remove rows and columns, sort, filter, and export CSV/TSV/JSON. (Category: format, Badge: CSV)
- [CSV Diff Checker](https://yourstand.art/csv-diff-checker): Compare two CSVs by primary key column(s) or row index with added/removed/modified cell-level diffs and summary report. (Category: format, Badge: Diff)
- [.env Diff Comparator](https://yourstand.art/env-diff-comparator): Compare two .env files safely in browser. Shows missing, extra, and changed keys with values masked by default. (Category: devops, Badge: ENV)
- [.env to netlify.toml](https://yourstand.art/env-to-netlify-toml): Convert .env variables to netlify.toml production, deploy-preview, or branch-deploy sections and back. (Category: devops, Badge: TOML)
- [Markdown to HTML](https://yourstand.art/markdown-to-html): Convert CommonMark and GFM tables, task lists, and code fences to HTML with live sanitized preview. (Category: convert, Badge: HTML)
- [HTML to Markdown](https://yourstand.art/html-to-markdown): Convert HTML headings, lists, tables, code blocks, and links into clean GitHub Flavored Markdown. (Category: convert, Badge: Markdown)
- [SQL Formatter & Minifier](https://yourstand.art/sql-formatter): Pretty-print or minify SQL queries with keyword case options and dialect support for PostgreSQL, MySQL, and SQLite. (Category: format, Badge: SQL)
- [XML to Java Class](https://yourstand.art/xml-to-java-class): Infer Java POJO classes from sample XML with Jakarta JAXB, Jackson XML, or plain POJO modes and Lombok @Data. (Category: generate, Badge: Java)
- [JavaScript Beautifier & Minifier](https://yourstand.art/javascript-beautifier-minifier): Format or safely minify JavaScript code with customizable indentation and string/regex safety. (Category: format, Badge: JS)
- [CSS Beautifier & Minifier](https://yourstand.art/css-beautifier-minifier): Beautify or minify CSS styles, handling nested media queries, variables, and calc() expressions. (Category: format, Badge: CSS)
- [HTML Beautifier & Minifier](https://yourstand.art/html-beautifier-minifier): Format or compress HTML markup while preserving code blocks, textareas, and inline script tags. (Category: format, Badge: HTML)
- [ISO 8601 Date Formatter](https://yourstand.art/iso8601-formatter): Format and convert timestamps to ISO 8601 UTC, timezone offsets, week dates, ordinal dates, and durations. (Category: convert, Badge: ISO)
- [Git Worktree Generator](https://yourstand.art/git-worktree-generator): Generate command workflows for git worktree add, checkout, branch creation, lock, and prune. (Category: devops, Badge: Git)
- [Form Validation Generator](https://yourstand.art/form-validation-generator): Define form fields and generate semantic HTML5 markup, typed Zod validation schemas, and accessible Vanilla JS code. (Category: generate, Badge: Forms)
- [GitHub Profile README Generator](https://yourstand.art/github-profile-readme-generator): Generate clean GitHub Profile README.md files with bio, learning goals, shields.io badges, and social links. (Category: generate, Badge: GitHub)
- [Swagger & OpenAPI Editor / Viewer](https://yourstand.art/swagger-openapi-editor-viewer): Inspect, validate, and explore OpenAPI 3.x and Swagger 2.0 specs in JSON or YAML with interactive endpoint documentation. (Category: format, Badge: OpenAPI)
- [Source Map Stack Trace Resolver](https://yourstand.art/source-map-stack-trace-resolver): De-minify production JavaScript stack traces to original source code files, lines, and columns using Source Map v3 JSON. (Category: format, Badge: SourceMap)
- [Schema Markup (JSON-LD) Validator](https://yourstand.art/schema-markup-validator): Validate JSON-LD structured data and HTML script tags against Schema.org specifications for Article, Product, FAQ, and more. (Category: format, Badge: Schema)
- [Open Graph Previewer & Meta Generator](https://yourstand.art/open-graph-previewer): Simulate Twitter and Facebook social cards, detect title and description truncation, and generate clean HTML meta tags. (Category: format, Badge: OpenGraph)
- [PWA Manifest Inspector](https://yourstand.art/pwa-inspector): Audit Web App manifest.json files against PWA installability requirements, verify icons and colors, and export fixed manifests. (Category: format, Badge: PWA)
- [WCAG Color Contrast Checker](https://yourstand.art/wcag-color-contrast-checker): Calculate exact WCAG 2.1 contrast ratios and AA/AAA conformance levels with nearest-passing color suggestions. (Category: format, Badge: WCAG)
- [Image Cropper](https://yourstand.art/image-cropper): Crop local PNG, JPEG, and WebP images with aspect ratio presets (1:1, 16:9, 4:3) and pixel-exact inputs. (Category: media, Badge: Crop)
- [Image to PDF](https://yourstand.art/image-to-pdf): Combine multiple PNG, JPEG, and WebP images into a single PDF with custom page size and orientation. (Category: media, Badge: PDF)
- [Image Watermark](https://yourstand.art/image-watermark): Stamp text or logo watermarks on images with 9-point grid alignment, tiled repeats, and opacity control. (Category: media, Badge: Watermark)
- [SVG to Image](https://yourstand.art/svg-to-image): Convert SVG vector code or files to high-resolution PNG, JPEG, or WebP at 1x, 2x, or 4x scale. (Category: media, Badge: SVG)
- [SVG Wave Generator](https://yourstand.art/svg-wave-generator): Generate parametric multi-layer SVG wave section dividers with adjustable crests, amplitude, and CSS data URIs. (Category: generate, Badge: Wave)
- [SVG Blob Generator](https://yourstand.art/blob-generator): Create organic closed cubic-bezier SVG blob shapes with parametric control over point count, irregularity, and size. (Category: generate, Badge: Blob)
- [Image Placeholder Generator](https://yourstand.art/image-placeholder-generator): Generate lightweight SVG and PNG placeholder images with custom dimensions, colors, labels, and data URIs. (Category: media, Badge: Placeholder)
- [Logo Placeholder Generator](https://yourstand.art/logo-placeholder-generator): Generate geometric monogram logo marks for prototypes and wireframes with custom initials, shapes, and palettes. (Category: media, Badge: Logo)
- [Image Color Extractor](https://yourstand.art/image-color-extractor): Extract dominant color palettes from any image with quantized bucket clustering, HEX, RGB, HSL, and percentage share. (Category: media, Badge: Palette)
- [Image Diff Checker](https://yourstand.art/image-diff-checker): Compare two images pixel-by-pixel to detect visual regressions, calculate percentage differences, and export diff masks. (Category: format, Badge: Diff)
- [Decimal Precision Calculator](https://yourstand.art/decimal-precision-calculator): Arbitrary-precision BigInt decimal math avoiding IEEE 754 float drift with exact rounding modes. (Category: convert, Badge: Math)
- [Work Hours Calculator](https://yourstand.art/work-hours-calculator): Track daily clock-in/out shifts across midnight with unpaid breaks, overtime thresholds, and gross pay tally. (Category: playgrounds, Badge: Hours)
- [Currency Formatter](https://yourstand.art/currency-formatter): Format numeric values across world locales and ISO 4217 currencies side-by-side via Intl.NumberFormat. (Category: convert, Badge: Currency)
- [Pomodoro Timer](https://yourstand.art/pomodoro-timer): Drift-free Pomodoro focus timer with custom intervals, Web Audio chime, desktop alerts, and local session tally. (Category: playgrounds, Badge: Timer)
- [High-Precision Stopwatch](https://yourstand.art/stopwatch): Millisecond-accurate stopwatch using performance.now() with split laps, average delta analysis, and CSV export. (Category: playgrounds, Badge: Time)
- [Event Countdown](https://yourstand.art/event-countdown): Accurate event countdown with IANA timezone conversion, working-day calculations, elapsed-time tracking, and shareable links. (Category: playgrounds, Badge: Countdown)
- [Decision Wheel & Random Picker](https://yourstand.art/decision-wheel): Interactive HTML5 canvas decision wheel with cryptographic randomness, custom weights, spin history, and presets for standups, meals, and dice. (Category: playgrounds, Badge: Picker)
- [Emoji Picker & Codepoint Inspector](https://yourstand.art/emoji-picker): Searchable emoji browser with skin tone modifiers, Unicode codepoints, HTML entities, and UTF-8 byte sequences. (Category: playgrounds, Badge: Emoji)
- [Floating Notes & Markdown Scratchpad](https://yourstand.art/floating-notes): Multi-note browser scratchpad with hashtags, live Markdown preview, JSON backup and restore, and localStorage persistence. (Category: playgrounds, Badge: Notes)
- [LLM Token & Cost Calculator](https://yourstand.art/llm-token-cost-calculator): Estimate prompt token counts via BPE tokenizer heuristic and project request and monthly batch inference costs with prompt caching. (Category: generate, Badge: AI/LLM)
- [Data Structures & Algorithms Visualizer](https://yourstand.art/dsa-visualizer): Step-by-step interactive visualizer for Sorting, Searching, Linked Lists, Stacks, Queues, Binary Search Trees, Heaps, and Graph Traversals. (Category: playgrounds, Badge: DSA)
- [Machine Learning Visualizer](https://yourstand.art/ml-visualizer): Click-to-plot interactive visualizer for Linear & Logistic Regression, k-NN, k-Means Clustering, Naive Bayes, and feature normalization, with formulas and step-by-step explanations. (Category: playgrounds, Badge: ML)
- [Docker Run to Compose](https://yourstand.art/docker-run-to-compose): Convert docker run CLI flags, ports, volumes, env vars, and resource limits into clean docker-compose.yml manifests. (Category: devops, Badge: Docker)
- [JSON to Pydantic v2 Model](https://yourstand.art/json-to-pydantic): Generate Python Pydantic v2 and v1 BaseModel classes with snake_case Field aliases, ConfigDict, and UUID/datetime detection. (Category: generate, Badge: Pydantic)
- [JSON to Prisma Schema](https://yourstand.art/json-to-prisma): Infer Prisma ORM schema.prisma models from JSON with @id, @unique, @map snake_case, and foreign-key relations. (Category: generate, Badge: Prisma)
- [SQL to Drizzle ORM](https://yourstand.art/sql-to-drizzle): Convert SQL CREATE TABLE DDL statements into TypeScript Drizzle ORM pgTable, mysqlTable, and sqliteTable schemas. (Category: generate, Badge: Drizzle)
- [JSON to Rust Serde Struct](https://yourstand.art/json-to-rust): Generate idiomatic Rust structs with #[derive(Serialize, Deserialize)], #[serde(rename)], and raw keyword escaping. (Category: generate, Badge: Rust)
- [CSP Builder & Security Auditor](https://yourstand.art/csp-generator): Build and audit HTTP Content-Security-Policy headers, flag XSS risks, and export Nginx, Cloudflare, or HTML meta configs. (Category: devops, Badge: CSP)
- [EXIF Viewer & Metadata Stripper](https://yourstand.art/exif-viewer-remover): Inspect hidden JPEG EXIF, GPS coordinates, and PNG metadata tags and strip them losslessly at the byte level. (Category: media, Badge: EXIF)
- [Photo Censor & Blur](https://yourstand.art/photo-censor): Redact passwords, credit cards, faces, and sensitive text in photos with pixelation, blur, or solid black bars. (Category: media, Badge: Censor)
- [1D Barcode Generator](https://yourstand.art/barcode-generator): Generate Code 128, EAN-13, EAN-8, UPC-A, and Code 39 linear barcodes in vector SVG and PNG with checksums. (Category: generate, Badge: Barcode)
- [CSS Cubic-Bezier Generator](https://yourstand.art/css-cubic-bezier-generator): Create custom CSS cubic-bezier easing curves visually with interactive drag handles and animation comparison. (Category: generate, Badge: Bezier)
- [Fake IBAN Generator & Validator](https://yourstand.art/fake-iban-generator): Generate valid synthetic test IBANs with ISO 7064 MOD-97-10 checksums across 10 countries and validate existing IBANs. (Category: generate, Badge: IBAN)
- [BMI Calculator & Body Health](https://yourstand.art/bmi-calculator): Calculate Body Mass Index (BMI) in Metric or Imperial with WHO classifications, target healthy weight ranges, and visual color gauge. (Category: convert, Badge: Health)
- [Job Timezone Converter (APAC, EMEA, AMER)](https://yourstand.art/job-timezone-converter): Remote worker cross-timezone coordinator. Convert job local time across APAC, EMEA, and AMER with 24h overlap matrix and meeting invite summaries. (Category: convert, Badge: Time)
- [English Tenses Master & Conjugator](https://yourstand.art/english-tenses): Reference guide for all 12 English verb tenses across past, present, and future with interactive affirmative, negative, and question conjugator. (Category: playgrounds, Badge: English)
- [Business Document Suite & PDF Builder](https://yourstand.art/document-generator): Unified commercial document studio. Build Invoices, Price Quotes, Payment Receipts, Purchase Orders, and Credit Notes with brand logos and live vector PDF. (Category: generate, Badge: Docs)
- [SEO & Growth Copywriter](https://yourstand.art/seo-copywriter): Generate high-ranking Google SERP titles, meta descriptions, AIDA/PAS marketing copy, and launch hooks with live pixel width checks and zero-server privacy. (Category: generate, Badge: SEO)
- [Photo Background Remover & Color Changer](https://yourstand.art/photo-background-remover): Cut out photo backgrounds and replace with transparent PNG, passport red, blue, or studio colors with perimeter flood-fill and zero server uploads. (Category: media, Badge: Photo)
- [Cloud Egress & Bandwidth Transfer Calculator](https://yourstand.art/cloud-egress-calculator): Calculate network data transfer completion times and project multi-cloud egress costs across AWS, GCP, Azure, and zero-egress providers. (Category: devops, Badge: Cloud)
- [ASCII Architecture & Diagram Sketcher](https://yourstand.art/ascii-diagram-generator): Design system architectures, sequence flows, and state machines in ASCII and Unicode box drawing. Export to Markdown or SVG. (Category: playgrounds, Badge: ASCII)
- [Audio Waveform & Soundwave Visualizer](https://yourstand.art/audio-waveform-generator): Convert audio files or live microphone input into customizable vector soundwave art. Export to SVG or PNG. (Category: media, Badge: Audio)
- [Audio & Melody Composer](https://yourstand.art/audio-composer): Compose monophonic melodies with Do-Re-Mi numbered notation, RTTTL ringtone format, and browser chiptune synthesis. Export to WAV, MIDI, or RTTTL. (Category: media, Badge: Audio)
- [PDF Redactor & Signature Stamper](https://yourstand.art/pdf-redactor): Permanently blackout sensitive details and stamp signatures onto PDF documents. 100% client-side privacy. (Category: media, Badge: PDF)
- [Screen & Bug Demo Video Recorder](https://yourstand.art/screen-recorder): Capture screens, browser tabs, and bug demos directly in browser. No extensions, zero watermark, 100% private. (Category: media, Badge: Video)
- [Video Clipper & Trimmer](https://yourstand.art/video-clipper): Trim and cut video clips from YouTube, Vimeo, Twitch, or local video files. Export timestamp links, responsive embeds, and download trimmed clips. (Category: media, Badge: Video)
- [Hex Dump Viewer & Inspector](https://yourstand.art/hex-dump-viewer): Inspect binary files, hex strings, and UTF-8 payloads with canonical 16-byte hex dumps, ASCII columns, and multi-byte numeric inspectors. (Category: format, Badge: HexDump)
- [Text Line Prefix & Suffix](https://yourstand.art/text-prefix-suffix): Prepend prefixes, append suffixes, add sequential line numbers, wrap items in quotes, and format lists for SQL, JSON, or code. (Category: format, Badge: TextLines)
- [Morse Code Converter & Audio Player](https://yourstand.art/morse-code-converter): Translate text to Morse code and decode signals back to text with PARIS Web Audio beeps, speed slider, and ITU reference chart. (Category: crypto, Badge: Morse)
- [Classical Cipher Studio](https://yourstand.art/cipher-tools): Encrypt, decrypt, and crack classical ciphers: Caesar shift (-25 to +25), ROT13, ROT47, Vigenère with keyword, Atbash, and 25-shift brute force. (Category: crypto, Badge: Cipher)
- [CSV & Delimited Column Studio](https://yourstand.art/csv-column-tools): Extract, delete, swap, reorder, and transpose columns across CSV, TSV, and delimited datasets with live table preview. (Category: format, Badge: Columns)
- [Bitwise & Binary Logic Lab](https://yourstand.art/bitwise-calculator): Interactive binary bitboard, circular bit shifts (ROL/ROR), arithmetic shifts, 2s complement, and Hamming weight popcount. (Category: convert, Badge: Bitwise)
- [Esoteric & Radix Encoders](https://yourstand.art/radix-encoders): Encode and decode Base32 (RFC 4648), Base58 (Bitcoin/IPFS), Ascii85 (Adobe/Git), Punycode IDN domains, and Unix Uuencode. (Category: crypto, Badge: Radix)
- [Text Stylizer & Zalgo Glitch](https://yourstand.art/text-glitch-zalgo): Generate Zalgo glitch chaos with custom sliders, LeetSpeak (1337), upside-down inverted letters, vaporwave fullwidth, and bubble fonts. (Category: format, Badge: Zalgo)
- [Steganography Studio (Text & Image)](https://yourstand.art/steganography-tool): Conceal secret messages invisibly inside plain text via Zero-Width Unicode or inside PNG pixels via Canvas LSB steganography. (Category: crypto, Badge: Stego)
- [CRC & Checksum Calculator](https://yourstand.art/crc-checksum-calculator): Compute IEEE CRC-32, Castagnoli CRC-32C, CRC-16-CCITT, CRC-16-Modbus, and Adler-32 with live checksum verification. (Category: crypto, Badge: CRC)

## Technical Comparisons
- [JSON Formatter vs JSON Validator](https://yourstand.art/compare/json-formatter-vs-json-validator): Pretty-printing and repairing structure vs checking syntax and pinpointing errors.
- [JSON to TypeScript vs JSON to Zod](https://yourstand.art/compare/json-to-typescript-vs-json-to-zod): Zero-cost compile-time TypeScript interfaces vs runtime payload validation with inferred types.
- [UUID v4 vs UUID v7](https://yourstand.art/compare/uuid-v4-vs-uuid-v7): 122-bit random identifiers vs Unix-epoch time-ordered identifiers for B-tree database primary keys.
- [YAML vs TOML](https://yourstand.art/compare/yaml-vs-toml): Indentation-scoped nested hierarchies vs explicit [table] headers and strict scalar quoting.
- [JWT Decoder vs JWT Signer](https://yourstand.art/compare/jwt-decoder-vs-jwt-signer): Reading an existing token's claims vs creating and HMAC-signing a brand new one.
- [MD5 vs SHA-256](https://yourstand.art/compare/md5-vs-sha256): Legacy 128-bit checksum vs 256-bit cryptographic digest.
- [JSON vs YAML](https://yourstand.art/compare/json-vs-yaml): Universal API wire format vs human-oriented configuration syntax.
- [CSV vs JSON](https://yourstand.art/compare/csv-vs-json): Flat tabular rows vs nested, self-describing documents.

## Engineering Guides
- [UUID v4 vs UUID v7: Database Indexing, B-Tree Fragmentation, and Migration](https://yourstand.art/guides/uuid-v4-vs-v7-database-indexing)
- [Protobuf Wire Format Explained: Decoding Varints & Binary Payloads Without Schemas](https://yourstand.art/guides/protobuf-wire-format-explained)
- [The Mathematics of CSS Fluid Typography: Deriving clamp() Without Media Queries](https://yourstand.art/guides/css-clamp-fluid-responsive-typography)
- [Zero-Server Architecture: Why Client-Side Execution Protects Developer Secrets](https://yourstand.art/guides/client-side-browser-security-developer-tools)
- [Cron Expression Syntax, Timezone Drift, and Overlapping Job Pitfalls](https://yourstand.art/guides/cron-expression-syntax-and-scheduling-pitfalls)
- [CSP Hardening & Nonce Architecture: Defeating XSS Without Allowlist Sprawl](https://yourstand.art/guides/content-security-policy-csp-hardening-guide)
- [Prisma vs Drizzle ORM Schema Design on PostgreSQL](https://yourstand.art/guides/orm-schema-design-prisma-vs-drizzle-postgresql)
- [JSON Formatting, Validation & RFC 8259 Edge Cases](https://yourstand.art/guides/json-formatting-validation-and-rfc8259-edge-cases)