Developer

JWT decoder (inspect only)

Decode JWT header and payload locally with expiry hints. Signatures are not verified.

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Saved locally in your browser only.

Filter by type

No saved results yet. Run the tool to capture output here.

Free — no login

Processed in your browser — files are not uploaded.

Inspect only — signatures are not verified and tokens never leave your browser.

JWT token

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkFkYSBMb3ZlbGFjZSIsImlhdCI6MTUxNjIzOTAyMiwiZXhwIjoxNzUxMjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

Valid format

Expired 6/29/2025, 11:17:02 PM

Header

{
  "alg": "HS256",
  "typ": "JWT"
}

Payload

{
  "sub": "1234567890",
  "name": "Ada Lovelace",
  "iat": 1516239022,
  "exp": 1751239022
}

Signature

SflKxwRJSMeK…adQssw5c

Signature bytes are shown masked for safety.

Frequently Asked Questions

Developer

JWT decoder (inspect only)

Decode JWT header and payload locally with expiry hints. Signatures are not verified.

Recent results

Saved locally in your browser only.

Filter by type

No saved results yet. Run the tool to capture output here.

Free — no login

Processed in your browser — files are not uploaded.

Inspect only — signatures are not verified and tokens never leave your browser.

JWT token

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkFkYSBMb3ZlbGFjZSIsImlhdCI6MTUxNjIzOTAyMiwiZXhwIjoxNzUxMjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

Valid format

Expired 6/29/2025, 11:17:02 PM

Header

{
  "alg": "HS256",
  "typ": "JWT"
}

Payload

{
  "sub": "1234567890",
  "name": "Ada Lovelace",
  "iat": 1516239022,
  "exp": 1751239022
}

Signature

SflKxwRJSMeK…adQssw5c

Signature bytes are shown masked for safety.

JWT decoder (inspect only)

Header

Payload

Signature

Frequently Asked Questions

Does this verify JWT signatures?

Is my token sent to your servers?

Can I paste production tokens?

JWT decoder (inspect only)

Header

Payload

Signature

Frequently Asked Questions

Does this verify JWT signatures?

Is my token sent to your servers?

Can I paste production tokens?