Key Features

• 100% Local Processing: Data is processed securely in your browser without server uploads.
• Base64Url Normalization: Accurately decodes multi-byte characters preventing garbled text.
• Real-time Validation: Automatically checks expiration (exp) and visualizes security risks.
• Two-way Editing: Edit the JSON payload to instantly re-encode into a new JWT in real-time.
• Signature Verification: Verify that the token has not been tampered with by entering a secret key (HMAC) or public key (RSA) locally.
• URL Parameter Integration: Pass a JWT via URL parameters (e.g., ?token=...) to directly open the decoded state from external tools.