JSON, Base64, UUIDs, hashing, URL encoding — the daily toolkit for developers.
Format, validate, and minify JSON with helpful error messages.
Encode text to Base64, including Unicode text.
Decode Base64 strings back to text, including Base64URL.
Generate random v4 UUIDs; up to 200 at a time.
URL-encode strings so they are safe as query parameters.
Decode percent-encoded URLs back to readable text.
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
Pick colors and copy them in HEX, RGB, or HSL.
Generate customisable QR codes for any URL or text, right in your browser.
Generate strong, random passwords using the browser’s crypto API.
Test JavaScript regular expressions with live match highlighting and capture groups.