Tools
Fileraz
Tools
Fileraz
Try jpg to png, compress image, pdf…
Developer tool
Your files never leave your device
Check your Network tab and see
Work starts the moment you drop a file
No daily limit, no sign-up, no watermark
Use this to inspect structure or mock a token in a local app that ignores signatures. Real auth needs your backend and a vaulted secret.
Header and payload use JWT's base64url alphabet with padding stripped, so libraries accept the token's structure. The signature slot stays empty — structure parses, nothing is verified.
Encoding happens locally, so nothing is transmitted — but still avoid pasting live user data or real secrets you would not put into any text box.
Empty signature — not for production keys.
It does not — the signature slot is intentionally empty. To actually sign, compute an HMAC-SHA256 over header.payload with your secret using the HMAC Generator, ideally on your backend.
Use the JWT Decoder on this hub to split and Base64-decode the header and payload of a token you already have.
No. The token is assembled in your browser tab.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.