Developer & Data Tools
Format, convert, encode and hash your data — entirely in your browser. Nothing you paste is ever uploaded.
JSON Formatter & Validator
Paste JSON to pretty-print, minify, or check for errors.
CSV ⇄ JSON Converter
Convert CSV (with a header row) to JSON, or a JSON array of objects back to CSV.
Base64 Encode / Decode
UTF-8 safe. Encode text to Base64 or decode it back.
URL Encode / Decode
Percent-encode text for safe use in URLs, or decode it back.
Hash Generator
Generate a cryptographic hash of your text using the browser's built-in Web Crypto.
UUID Generator
Generate random (version 4) UUIDs.
Private by design
Every tool on this page runs entirely in your browser using standard JavaScript and the built-in Web Crypto API. The text and data you paste never leave your device — there's no server, no upload, and nothing stored. That makes these tools safe for API keys, tokens, config files, and any other data you wouldn't want to paste into a random website.