Format & Validate

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.

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

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.

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

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

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

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

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.

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

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.

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

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.

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.

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

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.

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

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