Developer Tools
Format, encode, decode and inspect — the everyday developer toolkit.
Explore JSON as a collapsible, colour-coded tree — perfect for large payloads.
Beautify, minify and validate JSON with clear, instant error messages.
Convert CSV data into a clean JSON array with automatic type detection.
Flatten a JSON array into CSV with the delimiter of your choice.
Decode a JWT to read its header and payload, with expiry checks — nothing leaves the page.
Test regular expressions live with highlighted matches and a flags panel.
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes as you type.
Create cryptographically random v4 UUIDs in bulk, with formatting options.
Escape special characters into safe HTML entities for the web.
Turn HTML entities back into readable, plain characters.
Encode text to Base64 with full Unicode support, right in your browser.
Decode Base64 strings back into readable text instantly.
Percent-encode text for URLs, choosing component or full-URI mode.
Decode percent-encoded URLs into human-readable text.