JSON Formatter
Beautify, minify, and validate JSON instantly with exact line and column error reporting.
Fast, private developer tools that run in your browser
An all-in-one toolkit to format, validate, convert, and test your code instantly. From JSON formatting and JWT decoding to text diffing and hash generation—everything you need in one place.
No sign-ups. No server uploads. Your data never leaves your device.
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JSON Tools
JSON Comparer
Compare two JSON documents side by side and see every added, removed, and changed value.
JSON Converters
JSON to XML
Convert JSON to well-formed XML with custom root and item names, attributes, and indentation.
JSON to CSV
Turn JSON arrays into CSV for Excel or Google Sheets, with nested object flattening and custom delimiters.
JSON to YAML
Convert JSON to clean, readable YAML for Kubernetes, Docker Compose, CI pipelines, and config files.
JSON to Base64
Encode JSON as Base64 or base64url for headers, tokens, environment variables, and data URIs.
Base64 to JSON
Decode Base64 or base64url back into readable, validated, and pretty-printed JSON.
XML Tools
XML Formatter
Beautify, minify, and validate XML with exact line and column errors for unclosed tags, bad entities, and more.
XML Comparer
Compare two XML documents side by side and see every changed element, attribute, and value.
XML Converters
XML to JSON
Convert XML to JSON with attributes, repeated elements as arrays, and automatic number and boolean detection.
XML to YAML
Convert XML documents and configs into clean, readable YAML.
XML to CSV
Turn repeated XML records into a CSV table for Excel or Google Sheets, with automatic row detection.
XML to Base64
Encode XML documents, SOAP messages, and SVG as Base64 or base64url.
Base64 to XML
Decode Base64 into well-formed, validated, and formatted XML.
YAML Tools
YAML Formatter
Format and validate YAML with exact line and column errors. Keeps comments, anchors, and block scalars.
YAML to Base64
Encode YAML as Base64 for Kubernetes Secrets, CI variables, and config values.
Base64 to YAML
Decode Base64 strings, such as Kubernetes Secret values, back into readable YAML.
HTML Tools
HTML Formatter
Beautify or minify HTML and find unclosed tags, stray closing tags, and duplicate attributes.
HTML Viewer
Preview HTML live in a secure sandbox with mobile and tablet widths. Scripts and network access are off by default.
Code Formatters
SQL Formatter
Beautify long one-line SQL queries and ORM logs into clean, indented, syntax-highlighted SQL, or minify them.
GraphQL Formatter
Format and validate GraphQL queries, mutations, fragments, and schemas (SDL) with syntax highlighting.
Markdown Editor & Previewer
Write Markdown with a live GitHub-style preview: tables, task lists, code blocks, and alerts. Ideal for README files.
Encoding & Crypto
JWT Decoder
Decode and debug JSON Web Tokens, see when they expire, and verify HS, RS, PS, ES, and EdDSA signatures.
JWT Encoder
Create and sign JSON Web Tokens with HS256, RS256, ES256, PS256, or EdDSA, and generate test key pairs.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes and HMACs of text or files, live as you type.
Bcrypt Generator
Hash passwords with bcrypt at any cost factor and verify a password against an existing bcrypt hash.
UUID Generator
Generate v4, v7, v1, v5, and v3 UUIDs / GUIDs in bulk, and inspect any UUID's version and timestamp.
Password Generator
Generate strong random passwords and memorable passphrases with the browser's secure random generator.
RSA Key Pair Generator
Generate 2048, 3072, or 4096-bit RSA key pairs as PEM (PKCS#8, PKCS#1), JWK, or OpenSSH, in your browser.
Text & String Tools
Text Diff Checker
Compare two texts or code snippets side by side, with changed words highlighted and a downloadable patch.
Regex Tester
Test JavaScript regular expressions live, with highlighted matches, capture groups, and find and replace.
String Case Converter
Convert text and variable names to camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and more.
Word, Character & Byte Counter
Count words, characters, sentences, lines, and UTF-8 bytes as you type, with reading time and length limits.
Generators
Lorem Ipsum Generator
Generate lorem ipsum placeholder text by paragraphs, sentences, or words, as plain text, HTML, or Markdown.
Fake Data Generator
Generate realistic fake names, emails, addresses, and products in bulk as JSON, CSV, or SQL for testing.
QR Code Generator
Turn a URL, text, or Wi-Fi network into a QR code instantly and download it as SVG or PNG.
Cron Expression Generator
Build cron schedules with dropdowns, translate expressions like */15 * * * * into plain English, and see the next run times.
Web & Networking Tools
URL Encoder / Decoder
Percent-encode or decode URLs and query values, and unwrap double-encoded strings from logs in one click.
URL Parser
Break a URL into protocol, host, port, path, and fragment, and edit its query parameters as a key-value table.
User-Agent Parser
Identify the browser, operating system, device type, and bots from any User-Agent string, one or thousands at once.
cURL to Fetch / Axios
Convert cURL commands, including Copy as cURL from DevTools, into JavaScript fetch() or axios code.
HTTP Status Codes
Search every HTTP status code, from 200 OK and 404 Not Found to 418 I'm a teapot, with causes and fixes.
Time, Date & Number
Unix Timestamp Converter
Convert Unix epoch timestamps in seconds, milliseconds, or nanoseconds to dates in any time zone, and dates back to timestamps.
Time Zone Converter
Compare the time in UTC and cities around the world side by side, with a 24-hour timeline and daylight saving info.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly, with two's complement and a bit editor.
CSS & Design Utilities
Color Converter
Convert any color between HEX, RGB, HSL, HWB, OKLCH, Lab, and CMYK, with shades, tints, and color harmonies.
Color Contrast Checker
Check text and background colors against WCAG AA and AAA contrast rules, preview them, and get passing alternatives.
SVG Optimizer
Shrink SVG files by removing Figma, Illustrator, and Inkscape leftovers, rounding numbers, and minifying path data.