JWT Decoder: Decode and Inspect JSON Web Tokens Securely

JSON Web Tokens (JWTs) carry encoded claims between services. While they're Base64-encoded (not encrypted), decoding them manually is tedious. Our decoder instantly parses the header, payload, and signature, showing all claims in a readable format.

How to Use JWT Decoder

• 1.

  Paste your JWT token

• 2.

  View the decoded header (algorithm, type)

• 3.

  Inspect the payload (claims, expiration, issuer)

• 4.

  Check if the token is expired

Key Features

• Instant decode of all three JWT parts
• Human-readable claim names and timestamps
• Expiration check (is this token still valid?)
• Syntax-highlighted JSON output
• Fully client-side — your token never leaves the browser

When to Use This Tool

• •

  Debugging authentication issues

• •

  Inspecting OAuth tokens from providers

• •

  Verifying token claims during development

• •

  Checking token expiration times

Frequently Asked Questions