Developer Tools
JSON formatter and diff checker, JWT decoder, hash generator, regex tester, QR code and UUID generators, plus formatters for HTML, CSS, SQL and more.
JSON Diff Checker
Compare two JSON documents side by side and see exactly what changed.
QR Code Generator
Create a downloadable QR code from any text or URL.
JWT Decoder
Decode a JWT's header and payload. Decoding is not signature verification.
UUID Generator
Generate one or many random UUID v4 values.
Regex Tester
Test a regular expression against sample text and see matches highlighted.
Hash Generator
Generate a SHA-1, SHA-256, SHA-384 or SHA-512 hash of your text.
JSON Formatter
Format, validate and minify JSON with clear error messages.
JSON Validator
Check whether your JSON is valid, with a clear error if it is not.
Base64 Encoder
Encode text into Base64 format.
Base64 Decoder
Decode a Base64 string back into readable text.
URL Encoder
Encode special characters in a URL or URL component.
URL Decoder
Decode a percent-encoded URL back to its original form.
JSON Minifier
Remove unnecessary spaces and line breaks from JSON.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
HTML Formatter
Format and indent HTML code.
CSS Formatter
Format and indent CSS code.
JavaScript Formatter
Format JavaScript code with consistent style.
SQL Formatter
Format SQL queries into a readable, indented layout.
YAML to JSON Converter
Convert YAML data into JSON format.
XML Formatter
Format and validate XML code.
JSON to CSV Converter
Convert a JSON array of objects into CSV format.
JSON to TypeScript Converter
Generate a TypeScript interface from a JSON object.