Every developer keeps reaching for the same small utilities — pretty-printing JSON, decoding a JWT, encoding Base64, generating a UUID, hashing a string. Our Developer Toolbox bundles them into one fast tool that runs entirely in your browser, so you never paste sensitive tokens or payloads into a random website.
Because everything is processed locally, secrets in a JWT or an API response stay on your machine. Format, decode, generate, and hash without switching between a dozen different sites.
Essential utilities for programmers: JSON formatting, Base64 & URL encoding, JWT decoding, UUID generation, and hashing — all running locally in your browser with no data ever sent.
JSON, Base64, URL, JWT, UUID, and hashing together, so you stop hunting for separate sites.
Decode JWTs and payloads without sending secrets to a third-party server.
Formatting, decoding, and generation happen the moment you paste or click.
No. Every utility runs locally in your browser, so tokens, payloads, and text never leave your device.
It decodes and displays the header and payload for inspection. It does not verify the signature, which requires your secret key.
Yes. UUIDs are generated using the browser's secure random source in the standard v4 format.
Common secure hashes such as SHA-256 are available directly in the browser via the Web Crypto API.