JWT Decoder: Read JSON Web Tokens
Decode the header and payload of a JWT locally to inspect claims.
Files never leave your deviceFree
How to use it
- Type or paste your text on the left.
- The result appears instantly on the right.
- Use “Copy result”.
About JWT Decoder
A JWT has three parts separated by dots. The tool decodes the header and payload so you can read the claims and expiry. It does not verify the signature, so a readable token is not necessarily valid.
Example
Input
eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjMiLCJuYW1lIjoiQWxpIn0.x
Result
HEADER
{
"alg": "HS256"
}
PAYLOAD
{
"sub": "123",
"name": "Ali"
}FAQ
Does it verify the signature?
No. It only decodes; signature checks require the secret or public key.
Are my files uploaded to a server?
No. Everything runs in your browser; your files and text never leave your device.
Is it free? Do I need an account?
The tool is free and needs no registration.
Does it work on a phone?
Yes, in modern desktop and mobile browsers; large files depend on your device power.
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