JWT Decoder
Featured
Decode JWT header, payload, and expiry—including Bearer tokens—on your device.
- On your device
- No signup
Private on your device
Your information stays on your device and is not uploaded.
Related tools
JWT Encoder
Featured
Encode and sign JWTs with HS256 on your device.
- On your device
- No signup
JWT Generator
Featured
Generate sample JWTs with common claims.
- On your device
- No signup
Hash Generator
Featured
Generate SHA-256, SHA-384, and SHA-512 hashes.
- On your device
- No signup
HMAC Generator
Generate HMAC-SHA256, SHA384, and SHA512 digests locally.
- On your device
- No signup
JSON Formatter
Featured
Format, minify, and validate JSON with optional key sorting.
- On your device
- No signup
JSON Compare
Featured
Compare two JSON documents and list structural differences.
- On your device
- No signup
XML Formatter
Featured
Format, minify, and validate XML with readable indentation.
- On your device
- No signup
Paste a JWT and provide the matching HMAC secret or PEM public key to verify its signature on your device. Supports HS256/384/512, RS256/384/512, and ES256 with clear success or failure messaging. Decoding alone does not prove authenticity—this tool verifies signatures locally with no server calls.
How to use this tool
Open the JWT Verifier form on this page, enter the values or file required for your task, and run the tool. Review the results panel and adjust inputs as needed. Your data stays on your device and is not uploaded.
How it works
Paste a JWT and provide the matching HMAC secret or PEM public key. Signature verification uses WebCrypto locally—HS256/384/512, RS256/384/512, and ES256 are supported. Decoding alone does not prove authenticity.
Limitations
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Privacy and file handling
Your data stays on your device and is not uploaded.
FAQ
Frequently asked questions
Is JWT Verifier free?
Yes. It is free to use and you do not need to sign in or create an account.
Is my data private?
See the privacy note on this page. Many tools run on your device; some heavier file tools may use secure temporary processing when required.
Can I use JWT Verifier on mobile?
Yes. Open this page on your phone or tablet, enter your inputs, and use the on-screen controls.
Related pages
- Browse all free online tools on Utilnivo
- Explore more developer tools on Utilnivo
- JWT Decoder — Decode JWT header, payload, and expiry—including Bearer tokens—on your device.
- JWT Encoder — Encode and sign JWTs with HS256 on your device.
- JWT Generator — Generate sample JWTs with common claims.
- Hash Generator — Generate SHA-256, SHA-384, and SHA-512 hashes.
- HMAC Generator — Generate HMAC-SHA256, SHA384, and SHA512 digests locally.
- JSON Formatter — Format, minify, and validate JSON with optional key sorting.
Page last reviewed: