JWT Decoder Online (Free, Private)
Decode JSON Web Tokens online without uploading them to a server. Inspect header and payload locally in your browser.
JWTs are Base64URL-encoded JSON with three parts: header, payload, and signature. Decoding lets you inspect claims like exp, sub, and roles — essential for debugging auth flows.
Important security note
Decoding does not verify the signature. Never paste production JWTs into server-side decoders — they may log tokens. Utilio decodes entirely in your browser.
Decode a JWT →