The precision developer toolkit for Code, Documents, & Data.

Pretty-print with 2, 3, or 4-space indent, or minify to one line. Deep key sorting.

Auto-fix broken JSON, Python dicts, trailing commas, comments, and unquoted keys.

Syntax-only validation with exact line, column, and character offset pinpointing.

Validate payload data against Draft-07 schemas with JSONPath errors.

Compare JSON, YAML, code, or text side-by-side with full line & character diffs.

Interactive tree explorer. Click any node to copy JS dot, JSONPath, or jq paths.

Test JavaScript Regular Expressions with live match highlighting and group extraction.

Decode JSON Web Tokens instantly. Inspect claims, header, and expiration times.

Create, sign, and verify HMAC JSON Web Tokens (HS256, HS384, HS512) via Web Crypto API.

Inspect JavaScript keyboard event properties, event.key, event.code, and modifier keys in real-time.

Convert Unix epoch timestamps to ISO 8601, UTC, and local time with live ticking clock.

Generate Zod v3 and Valibot validation schemas with type inference from JSON.

Decode binary Protobuf wire data to JSON, .proto schema, and .pbtxt with byte wire inspector.

Convert cURL commands to Fetch, Axios, Python HTTPX, Go, and Rust API clients.

Create presentation-ready code snippet cards in PNG or SVG with macOS window frames.

Calculate fluid clamp() formulas for responsive typography and spacing with live slider.

Interactive visual Git solver. Undo commits, recover reflogs, squash, and rename branches.

Minify SVG vectors, strip Figma & Illustrator metadata, and round path coordinates.

Convert JSON trees to clean, indented YAML for Kubernetes, Compose, and configs.

Parse YAML configs, manifests, or snippets to clean formatted JSON.

Deterministic CSV parser with custom delimiters, header toggles, and auto-typing.

Export array of JSON objects to RFC-4180 CSV with custom delimiters.

Generate realistic mock datasets (Users, Products, Telemetry) in JSON, CSV, and SQL.

URL encode deep objects with bracket, dot, or JSON nesting notations.

Parse URL query parameters, full URLs, and bracket structures to JSON.

Render JSON as a Python dict/list literal. null → None, true → True, false → False.

Convert Python dict/list literals to JSON. Handles None, True, False, and single quotes.

Generate robust TypeScript interfaces and types with optional/readonly support.

Generate idiomatic Go structs with json tags and nested struct definitions.

Compile JSON to Python @dataclass, TypedDict, or valid literal source code.

Draft clean models.Model schemas with field lengths and nullability hints.

Transform JSON filters to parameterized WHERE or objects to INSERT statements.

Generate GraphQL types, query schemas, and mutation inputs from JSON payloads.

Convert raw HTML to clean React JSX/TSX with class to className, styles, and self-closing tags.

Convert raw SVG code to clean React JSX/TSX components with live vector preview and currentColor styling.

Extract JSON payloads from cURL and generate JS Fetch, Python, and Go code.

Deconstruct URLs and edit query parameters interactively with 2-way real-time synchronization.

Convert a Postman Collection v2.1 JSON to an OpenAPI 3.0 YAML spec. Extracts endpoints, params, and request bodies.

Convert an OpenAPI 3.0 JSON or YAML spec to a Postman Collection v2.1 with folders, bodies, and example responses.

Convert Docker Compose YAML services to Kubernetes Deployment and Service manifests.

Calculate numeric octal and symbolic Linux file permissions with visual rwx checkboxes.

Calculate IPv4 CIDR subnet masks, network & broadcast IPs, and usable host ranges.

Convert crontab expressions into plain English schedules and calculate next execution dates.

Complete RFC reference directory of HTTP response status codes and security/caching headers.

Encode & decode Base64 with full UTF-8 and URL-safe support. Instant 2-way swap.

Decode Base64 strings to images, inspect dimensions and file size, and download binary images.

Decode SSL/TLS X.509 certificates and CSRs. Inspect SANs, validity, issuer, and SHA-256 fingerprints.

MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512 and HMAC, client-side and instant.

Generate UUID v4, UUID v7, NanoID, and CUID in bulk. Fast, secure, and private.

Add or remove hyphens from UUIDs. Convert between compact 32-char hex and standard 8-4-4-4-12 canonical format.

Convert HEX, RGB, HSL color models and check WCAG AA/AAA contrast ratios.

Real-time Jinja2 sandbox with filters, loops, and zero server execution.

Real-time client-side frontend sandbox with live iframe rendering, console logging, and instant export.

Execute modern ES2024 and TypeScript in sandboxed thread. Live console logs and execution benchmarks.

Execute real Python 3.12 in WebAssembly (Pyodide). Standard libraries included. Zero server execution.

In-browser SQLite WebAssembly memory database. Run joins, window functions, and export CSV/JSON.

Lightweight Lua 5.4 in WebAssembly (Fengari). Test tables, metatables, and closures.

Live Markdown editor with Mermaid diagrams, LaTeX math, and HTML/MD export.

Percent-encode or decode strings and full URLs. Component mode for query values, Full URI mode preserves :/?#[]@.

Convert integers between binary, octal, decimal, hex, or any custom base 2-36. BigInt-backed for arbitrary precision.

Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, Sentence case, and dot.case.

Generate secure random passwords and alphanumeric tokens with crypto.getRandomValues and an entropy-based strength meter.

Convert Length, Weight, Temperature, Area, Volume, Speed, Data Storage, Time, Pressure, Energy, Power, Angle, Frequency, and Data Transfer with live all-units matrix.

Generate QR codes from text or URLs with adjustable error correction, size, and colors. PNG download.

Compress images to JPEG with a quality slider. Before/after file size and percentage saved.

Resize images to exact pixel dimensions or presets, with aspect-ratio lock.

Convert images between PNG, JPEG, and WebP with a quality slider for lossy formats.

Generate every favicon size (16 to 512px) from one image, plus manifest JSON and head tags.

Generate .gitignore files for Node, Python, Go, Rust, Java, macOS, Docker, Terraform and more. Merged, de-duped.

Build spec-correct Conventional Commits messages with type, scope, body, and breaking-change footers.

Convert a date/time across IANA timezones and compare 3-4 zones side by side.

Exact calendar age in years, months, and days, plus total days, weeks, and next-birthday countdown.

Live word, character, sentence, and paragraph counts, reading time, and top-10 frequent words.

Parse raw HTTP headers into a table: flags Set-Cookie, breaks out Cache-Control & CSP, and checks for HSTS.

Upload or paste a .har file and inspect every request: method, status, size, timing, full headers and body.

Generate a minimal OpenAPI 3.0 YAML skeleton from a .har file, grouped by path and method.

Convert a .har file into a readable Markdown summary for PR descriptions and bug reports.

Send real GET/POST/PUT/PATCH/DELETE requests from your browser and inspect the response.

Generate RSA-OAEP or RSASSA-PKCS1-v1_5 key pairs (2048/3072/4096-bit) as PEM. Pure Web Crypto, nothing persisted.

Hash passwords with bcrypt at a configurable cost factor, or verify a password against an existing hash.

Build linear, radial, and conic CSS gradients visually with live preview and copyable CSS.

Generate a 5-swatch palette from one color via complementary, analogous, triadic, monochromatic, or split-complementary harmony.

Generate a deterministic geometric identicon avatar from any text seed. Same input, same avatar, every time.

Flatten nested JSON into dot/bracket keys, or unflatten back. Configurable delimiter and array notation.

Convert XML to JSON and back. Attributes under @attributes, text under #text, repeats become arrays.

Convert a JSON array to a Markdown table, or any JSON to a nested bullet list.

Live HTML table preview from JSON. Copy as Markdown, TSV, or raw HTML.

Generate classic Lorem Ipsum placeholder text by word, sentence, or paragraph count.

Visual flexbox container builder (direction, justify, align, wrap, gap) with live preview and copy-ready CSS.

Combine multiple PDFs into one file, in any order you choose, entirely in your browser.

Extract a page range or split a PDF into fixed-size chunks, entirely in your browser.

Record webcam video with audio via MediaRecorder. Live preview, instant playback, local download.

Live speech transcription via the Web Speech API. Chrome/Edge only, multiple languages, interim + final results.

Infer a Draft-07 JSON Schema from a sample JSON value: types, required fields, nested properties, array items.

Convert tab-separated values to JSON and back. Same engine as CSV to JSON, delimiter fixed to tab.

Validate NDJSON line by line with per-line errors; convert to/from a single JSON array.

Convert JSON to TOML and back: scalars, arrays, [table] headers. Hand-written, no dependency.

Infer an OpenAPI 3.0 schema object from sample JSON, ready for components.schemas. YAML or JSON output.

Postman-class browser client for REST, GraphQL, and gRPC-Web / Connect with collections, environments, and pm.* test scripts.

Escape or unescape HTML entities using named (&), decimal (&), or hex (&) formats with optional attribute-quote encoding.

Compute HMAC-SHA1, HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512 via Web Crypto with UTF-8, hex, and Base64 keys and outputs.

Convert UTF-8 text to 8-bit binary, hexadecimal, octal, or decimal byte values and decode byte streams back to text.

Translate text, serial numbers, and digits to the ICAO / NATO phonetic alphabet (Alfa, Bravo, Charlie) and decode back.

Convert integers 1..3999 to Roman numerals and back with strict canonical validation and step-by-step breakdown.

Convert integers and decimals to English cardinal, ordinal (twenty-third), and currency/cheque words up to decillions.

Generate unbiased random strings in bulk via crypto.getRandomValues with custom charsets, 0O1lI exclusion, and entropy display.

Sort (A-Z, natural, numeric, length), deduplicate, reverse, or Fisher-Yates shuffle newline lists, CSVs, and JSON arrays.

Evaluate password entropy, pattern penalties (walks, repeats, l33t roots, years), and online/offline crack-time estimates.

Extract browser, rendering engine, OS, device type (desktop/mobile/tablet/bot/CLI), and CPU architecture from User-Agent strings.

Parse PHP serialize() strings to JSON with UTF-8 byte-length accuracy and exact byte error offsets, or serialize JSON to PHP.

Validate SemVer 2.0.0 versions, evaluate npm ranges (^, ~, >=, A - B, ||), sort version lists, and compute version bumps.

Sort JSON object keys recursively asc/desc, optionally sort primitive or object arrays by key, and preserve indent.

Convert JSON to well-formed XML with configurable root and item tags, @attribute prefix, #text key, and CDATA.

Interactive collapsible YAML tree with JSONPath key paths, data types, search filter, and line error checks.

Convert CSV or TSV into GitHub Flavored Markdown tables with per-column alignment, pipe escaping, and padding.

Editable spreadsheet grid in browser: load CSV/TSV, add/remove rows and columns, sort, filter, and export CSV/TSV/JSON.

Compare two CSVs by primary key column(s) or row index with added/removed/modified cell-level diffs and summary report.

Compare two .env files safely in browser. Shows missing, extra, and changed keys with values masked by default.

Convert .env variables to netlify.toml production, deploy-preview, or branch-deploy sections and back.

Convert CommonMark and GFM tables, task lists, and code fences to HTML with live sanitized preview.

Convert HTML headings, lists, tables, code blocks, and links into clean GitHub Flavored Markdown.

Pretty-print or minify SQL queries with keyword case options and dialect support for PostgreSQL, MySQL, and SQLite.

Infer Java POJO classes from sample XML with Jakarta JAXB, Jackson XML, or plain POJO modes and Lombok @Data.

Format or safely minify JavaScript code with customizable indentation and string/regex safety.

Beautify or minify CSS styles, handling nested media queries, variables, and calc() expressions.

Format or compress HTML markup while preserving code blocks, textareas, and inline script tags.

Format and convert timestamps to ISO 8601 UTC, timezone offsets, week dates, ordinal dates, and durations.

Generate command workflows for git worktree add, checkout, branch creation, lock, and prune.

Define form fields and generate semantic HTML5 markup, typed Zod validation schemas, and accessible Vanilla JS code.

Generate clean GitHub Profile README.md files with bio, learning goals, shields.io badges, and social links.

Inspect, validate, and explore OpenAPI 3.x and Swagger 2.0 specs in JSON or YAML with interactive endpoint documentation.

De-minify production JavaScript stack traces to original source code files, lines, and columns using Source Map v3 JSON.

Validate JSON-LD structured data and HTML script tags against Schema.org specifications for Article, Product, FAQ, and more.

Simulate Twitter and Facebook social cards, detect title and description truncation, and generate clean HTML meta tags.

Audit Web App manifest.json files against PWA installability requirements, verify icons and colors, and export fixed manifests.

Calculate exact WCAG 2.1 contrast ratios and AA/AAA conformance levels with nearest-passing color suggestions.

Crop local PNG, JPEG, and WebP images with aspect ratio presets (1:1, 16:9, 4:3) and pixel-exact inputs.

Combine multiple PNG, JPEG, and WebP images into a single PDF with custom page size and orientation.

Stamp text or logo watermarks on images with 9-point grid alignment, tiled repeats, and opacity control.

Convert SVG vector code or files to high-resolution PNG, JPEG, or WebP at 1x, 2x, or 4x scale.

Generate parametric multi-layer SVG wave section dividers with adjustable crests, amplitude, and CSS data URIs.

Create organic closed cubic-bezier SVG blob shapes with parametric control over point count, irregularity, and size.

Generate lightweight SVG and PNG placeholder images with custom dimensions, colors, labels, and data URIs.

Generate geometric monogram logo marks for prototypes and wireframes with custom initials, shapes, and palettes.

Extract dominant color palettes from any image with quantized bucket clustering, HEX, RGB, HSL, and percentage share.

Compare two images pixel-by-pixel to detect visual regressions, calculate percentage differences, and export diff masks.

Arbitrary-precision BigInt decimal math avoiding IEEE 754 float drift with exact rounding modes.

Track daily clock-in/out shifts across midnight with unpaid breaks, overtime thresholds, and gross pay tally.

Format numeric values across world locales and ISO 4217 currencies side-by-side via Intl.NumberFormat.

Drift-free Pomodoro focus timer with custom intervals, Web Audio chime, desktop alerts, and local session tally.

Millisecond-accurate stopwatch using performance.now() with split laps, average delta analysis, and CSV export.

Accurate event countdown with IANA timezone conversion, working-day calculations, elapsed-time tracking, and shareable links.

Interactive HTML5 canvas decision wheel with cryptographic randomness, custom weights, spin history, and presets for standups, meals, and dice.

Searchable emoji browser with skin tone modifiers, Unicode codepoints, HTML entities, and UTF-8 byte sequences.

Multi-note browser scratchpad with hashtags, live Markdown preview, JSON backup and restore, and localStorage persistence.

Estimate prompt token counts via BPE tokenizer heuristic and project request and monthly batch inference costs with prompt caching.

Step-by-step interactive visualizer for Sorting, Searching, Linked Lists, Stacks, Queues, Binary Search Trees, Heaps, and Graph Traversals.

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.

Convert docker run CLI flags, ports, volumes, env vars, and resource limits into clean docker-compose.yml manifests.

Generate Python Pydantic v2 and v1 BaseModel classes with snake_case Field aliases, ConfigDict, and UUID/datetime detection.

Infer Prisma ORM schema.prisma models from JSON with @id, @unique, @map snake_case, and foreign-key relations.

Convert SQL CREATE TABLE DDL statements into TypeScript Drizzle ORM pgTable, mysqlTable, and sqliteTable schemas.

Generate idiomatic Rust structs with #[derive(Serialize, Deserialize)], #[serde(rename)], and raw keyword escaping.

Build and audit HTTP Content-Security-Policy headers, flag XSS risks, and export Nginx, Cloudflare, or HTML meta configs.

Inspect hidden JPEG EXIF, GPS coordinates, and PNG metadata tags and strip them losslessly at the byte level.

Redact passwords, credit cards, faces, and sensitive text in photos with pixelation, blur, or solid black bars.

Generate Code 128, EAN-13, EAN-8, UPC-A, and Code 39 linear barcodes in vector SVG and PNG with checksums.

Create custom CSS cubic-bezier easing curves visually with interactive drag handles and animation comparison.

Generate valid synthetic test IBANs with ISO 7064 MOD-97-10 checksums across 10 countries and validate existing IBANs.

Calculate Body Mass Index (BMI) in Metric or Imperial with WHO classifications, target healthy weight ranges, and visual color gauge.

Remote worker cross-timezone coordinator. Convert job local time across APAC, EMEA, and AMER with 24h overlap matrix and meeting invite summaries.

Reference guide for all 12 English verb tenses across past, present, and future with interactive affirmative, negative, and question conjugator.

Unified commercial document studio. Build Invoices, Price Quotes, Payment Receipts, Purchase Orders, and Credit Notes with brand logos and live vector PDF.

Generate high-ranking Google SERP titles, meta descriptions, AIDA/PAS marketing copy, and launch hooks with live pixel width checks and zero-server privacy.

Cut out photo backgrounds and replace with transparent PNG, passport red, blue, or studio colors with perimeter flood-fill and zero server uploads.

Calculate network data transfer completion times and project multi-cloud egress costs across AWS, GCP, Azure, and zero-egress providers.

Design system architectures, sequence flows, and state machines in ASCII and Unicode box drawing. Export to Markdown or SVG.

Convert audio files or live microphone input into customizable vector soundwave art. Export to SVG or PNG.

Compose monophonic melodies with Do-Re-Mi numbered notation, RTTTL ringtone format, and browser chiptune synthesis. Export to WAV, MIDI, or RTTTL.

Permanently blackout sensitive details and stamp signatures onto PDF documents. 100% client-side privacy.

Capture screens, browser tabs, and bug demos directly in browser. No extensions, zero watermark, 100% private.

Trim and cut video clips from YouTube, Vimeo, Twitch, or local video files. Export timestamp links, responsive embeds, and download trimmed clips.

Inspect binary files, hex strings, and UTF-8 payloads with canonical 16-byte hex dumps, ASCII columns, and multi-byte numeric inspectors.

Prepend prefixes, append suffixes, add sequential line numbers, wrap items in quotes, and format lists for SQL, JSON, or code.

Translate text to Morse code and decode signals back to text with PARIS Web Audio beeps, speed slider, and ITU reference chart.

Encrypt, decrypt, and crack classical ciphers: Caesar shift (-25 to +25), ROT13, ROT47, Vigenère with keyword, Atbash, and 25-shift brute force.

Extract, delete, swap, reorder, and transpose columns across CSV, TSV, and delimited datasets with live table preview.

Interactive binary bitboard, circular bit shifts (ROL/ROR), arithmetic shifts, 2s complement, and Hamming weight popcount.

Encode and decode Base32 (RFC 4648), Base58 (Bitcoin/IPFS), Ascii85 (Adobe/Git), Punycode IDN domains, and Unix Uuencode.

Generate Zalgo glitch chaos with custom sliders, LeetSpeak (1337), upside-down inverted letters, vaporwave fullwidth, and bubble fonts.

Conceal secret messages invisibly inside plain text via Zero-Width Unicode or inside PNG pixels via Canvas LSB steganography.

Compute IEEE CRC-32, Castagnoli CRC-32C, CRC-16-CCITT, CRC-16-Modbus, and Adler-32 with live checksum verification.