Developer Tools
Free developer tools that run directly in your browser — not a single character of your data is sent to any server, with no sign-up and no daily limits.
JSON Formatter
Format or minify JSON and validate its syntax, with the exact line and column of any error
🔑JWT Decoder
Decode a JWT’s header and payload and read its expiry dates, without verifying the signature
🔤Base64 Encoder
Encode text to Base64 or decode it back, standard or URL-safe, any language
🆔UUID Generator
Generate random v4 UUIDs in bulk, or inspect one you already have and read its version and variant
🔢Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 for any text at once, and compare against a hash you have
🧵Regex Tester
Test a regex pattern against your text live, see every match highlighted with its groups, or try a replace
🔳QR Generator
Generate a QR code for any text or URL, pick the error-correction level, and download it as a PNG
Every developer tool here runs entirely inside your browser, alongside a set of PDF tools andtext tools built on the same principle — nothing is ever uploaded to a server.