🔑 JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, and check expiration. 100% browser-based.
You use this tool often? Pro includes files up to 500 MB and priority processing.
What is JWT Decoder?
WebFileTools JWT Decoder lets you inspect the header and payload of a JSON Web Token without installing any tool.
How to use this tool?
Paste your JWT token. The header and payload are decoded instantly with syntax highlighting.
Benefits
- Instant header + payload decoding
- Expiration detection
- JSON syntax highlighting
- 100% local — no upload
Frequently Asked Questions
- Is my token sent to a server?
- No, decoding is done entirely in your browser. No data is transmitted.
- Is the JWT cryptographically verified?
- No, the tool decodes and displays the content without verifying the signature.
- Can I check if my token is expired?
- Yes, exp and iat fields are converted to readable dates and expiration is visually indicated.
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Use →What is JWT Decoder?
WebFileTools JWT Decoder lets you inspect the header and payload of a JSON Web Token without installing any tool.
How to use this tool?
Paste your JWT token. The header and payload are decoded instantly with syntax highlighting.
Benefits
- Instant header + payload decoding
- Expiration detection
- JSON syntax highlighting
- 100% local — no upload
Frequently Asked Questions
- Is my token sent to a server?
- No, decoding is done entirely in your browser. No data is transmitted.
- Is the JWT cryptographically verified?
- No, the tool decodes and displays the content without verifying the signature.
- Can I check if my token is expired?
- Yes, exp and iat fields are converted to readable dates and expiration is visually indicated.
Similar Tools
Base64 Encoder
Encode/decode text or a file to Base64. Data URL and one-click copy. 100% in the browser.
Use →JSON Formatter
Validate, format, and minify JSON. Syntax highlighting and file import. 100% in the browser.
Use →Password Generator
Generate cryptographically secure passwords. Customize length, character sets and check strength. 100% in the browser.
Use →