🔑 Developer Tool

JWT Decoder & Debugger

Paste any JWT token to instantly decode the header, payload, and signature. Check expiry, inspect all claims, and debug auth issues in seconds.

⚡ Instant Decode 🔒 100% Client-Side ⏱ Expiry Detection 📋 Copy Sections 🟢 No Login

🔑 Paste Your JWT Token

Paste a JWT token above to decode it

HEADER

Header appears here after decoding

PAYLOAD

Payload appears here after decoding

SIGNATURE

Signature appears here after decoding

ⓘ Signatures cannot be verified without the secret key. This tool only decodes — it does not validate signatures cryptographically. Never paste production tokens into untrusted tools.

📄 Sample Tokens — Click to Load

HS256 Basic User Token

Standard JWT with user ID, name, and issue time. No expiry.

HS256 Auth Token with Roles

Authentication token with user roles, email, issuer, and expiry.

EXPIRED Expired Token

A JWT that has already passed its expiry time. Good for testing.

RS256 RSA Signed Token

JWT signed with RS256, commonly used in OAuth and enterprise flows.