Is JWT Decoder processed locally?

The tool runs in the browser for typical developer workflows, which helps keep pasted code, payloads, and text on your device.

Can JWT Decoder handle large input?

It can handle normal browser-sized input well. Very large files may depend on your device memory and browser performance.

No account is required. The tool is available directly in the browser.

Developer Tools

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

Payload
{
  "sub": "mkdiff",
  "iat": 1700000000
}

Signature
signature