Developer Tools
Debug tokens, encode data, generate hashes, and inspect files without uploading your data.
Everything runs locally in your browser.
Decode and inspect JSON Web Tokens locally.
Encode and decode Base64 and Base64URL data.
These tools connect into the jobs developers do every day. Each step runs locally.
The difference is where your data goes. A traditional tool sends your input to a server, which means a copy lands on someone else machine. FileMint runs the same job in your browser tab, so tokens, hashes, and files never leave the device.
Yes. Every tool on this page is free to use and runs entirely in your browser. There is no account, no trial, and no usage limit.
No. Processing happens locally in your browser, so the data you paste or the files you open never leave your device. There is no server in the path that could receive them.
Yes. Developers use them to inspect live tokens, verify downloads, and format API responses. Always follow your organization security policies, and avoid pasting production secrets you would not normally handle on your own machine.
Convenience and zero installation. You get the same result as a command-line utility without installing anything, and the work stays on your device. It is the fast option for a one off check.