Free developer tools
Free developer tools: JSON formatter, CSV/JSON converters, Base64 and URL encoding, JWT decoder and SHA-256 hashes. Everyday developer utilities that never send your data to a server.
JSON formatter & validator
Format, validate and minify JSON online. Shows the exact line and column of syntax errors. Runs entirely in your browser.
Base64 encoder & decoder
Encode text to Base64 or decode Base64 back to text, with full UTF-8 support for Urdu, emoji and other languages.
URL encoder & decoder
Percent-encode text for safe use in URLs and query strings, or decode %20-style links back to readable text.
SHA-256 hash generator
Generate SHA-256, SHA-1, SHA-384 or SHA-512 hashes of text instantly, using your browser's built-in cryptography.
JWT decoder
Decode a JSON Web Token to view its header and payload claims, and see when it was issued and when it expires.
CSV to JSON converter
Convert CSV data into a JSON array of objects using the header row as keys. Handles quotes, commas and line breaks in cells.
JSON to CSV converter
Convert a JSON array into CSV you can open in Excel or Google Sheets. Collects every key as a column and escapes values safely.