JWT Decoder
Paste a JWT token to instantly decode and inspect its header, payload, and signature — entirely in your browser.
Why Use PixConvert JWT Decoder
Zero-risk token inspection. Your tokens never leave your device.
Instant Decode
Header and payload decoded the moment you paste. No button required.
Zero Network Risk
JWT decoding is pure client-side base64url parsing. Tokens never leave your browser.
Expiry Detection
Automatically detects exp, iat, and nbf claims and shows human-readable timestamps with expired/active status.
Algorithm Display
Shows the signing algorithm (RS256, HS256, ES384, etc.) from the header.
Formatted JSON
Payload displayed as pretty-printed JSON for easy reading and copying.
Copy Claims
Copy the full payload JSON with one click to paste into test fixtures or debugging sessions.
When You Need a JWT Decoder
Debugging auth flows is faster when you can see token contents instantly.
API Debugging
Inspect Bearer tokens from Authorization headers to understand what claims your API receives.
- Decode access tokens
- Check user roles and permissions
- Verify expiry times
OAuth & OIDC Development
Decode ID tokens and access tokens during OAuth 2.0 and OpenID Connect integration.
- Inspect id_token claims
- Verify sub and email fields
- Check token expiry and nbf
Security Auditing
Review JWT algorithm and claims as part of a security assessment — client-side so no token exposure.
- Detect weak algorithms (none, HS256)
- Check claim scope
- Inspect token lifetime
How to Decode a JWT Token
Paste your JWT token into the input field. The decoder splits it at dots and base64url-decodes each part.
Header and payload appear as formatted JSON. Standard claims (exp, iat, sub) are highlighted with human-readable labels.
Inspect the signature segment and detect expired tokens at a glance — all decoding runs locally, never on our servers.
Explore More Tools
Discover other free tools that work great alongside this one
Base64 Encoder
Encode and decode Base64 strings
JSON Formatter
Format, validate, and minify JSON instantly
Hash Generator
Generate MD5, SHA-1, SHA-256 hashes
URL Encoder
Encode and decode URL components
Password Generator
Generate strong, random passwords
UUID Generator
Generate v4 UUIDs and ULIDs
Frequently Asked Questions
JWT decoding explained.
Is it safe to paste a JWT token here?
The header and payload sections of a JWT are base64url-encoded, not encrypted — they're readable by anyone who has the token. Decoding them here is equivalent to decoding them in your own code. The secret key used for signature verification is never decoded or needed. However, treat JWTs like passwords — don't paste production tokens into untrusted tools.
Does this verify the JWT signature?
No. Signature verification requires the secret key (HMAC) or public key (RSA/ECDSA), which you should never share with a third-party tool. This decoder only reads the header and payload (the first two segments), which are public by design.
What is the exp claim?
The exp (expiration) claim is a Unix timestamp (seconds since epoch) after which the token is invalid. This tool converts it to a human-readable date and shows whether the token is currently active or expired.
What's the difference between access_token and id_token?
In OAuth 2.0/OIDC: access_token authorizes API calls and is opaque or JWT. id_token is always a JWT and contains identity claims (sub, email, name). Both can be decoded here.
Why does the signature look like random characters?
The signature is a cryptographic hash of the header and payload, signed with the issuer's secret or private key. It's binary data encoded as base64url — it's not meant to be human-readable. Its purpose is verification, not inspection.