Is jwt.io safe to use?

Short answer

jwt.io uploads your files to its servers.

When you use jwt.io, your documents are transmitted over the internet to third-party servers for processing. You are trusting their retention, security, and privacy policies with your data — and once a file is uploaded, you cannot verify what happens to it.

The private alternative

Brevio runs every tool entirely inside your browser. Your files are never uploaded — they never leave your device. No account, no server, no retention. You can verify it yourself in the browser network tab.

Frequently asked questions

Is jwt.io better than Brevio for JWT work?

jwt.io specialises in JWT and supports signature verification with public keys. Brevio's JWT decoder is for inspecting token contents without signature verification. For security testing and JWT signing, jwt.io is more capable.

Does jwt.io upload my JWT to a server?

jwt.io processes JWTs in-browser. Both tools are browser-based for the decoding operation.