JWT Decoder / Debugger Online
IPOK dev tools provide fast network diagnostics and data conversions, including IP purity, subnet risk, DNSBL blacklist, and ASN routing lookups.
JWTs are everywhere in auth and API access. Debugging APIs or analyzing traffic often means decoding an eyJ… token to read its claims.
Unlike many online tools, this decoder runs entirely in your browser — a JWT usually carries identity and permissions, which should never be uploaded to a third-party server. It decodes only (no signature verification) and formats iat / exp / nbf into readable times, flagging whether it's expired.
Decoded locally (signature not verified) — JWTs carry sensitive credentials; this tool never uploads them.