Is Base64 JWT Decoder free to use?

Yes, Base64 JWT Decoder on SarmoTools is completely free. All processing happens in your browser — no sign-up, no data collection, no server uploads.

JWT Decoder

Paste your JSON Web Token (JWT) to inspect the Header algorithm and the Data Payload. 100% client-side decoding�your tokens are never sent to a server.

Encoded JWT Token

Header (Algorithm & Type)

Payload (Data & Claims)

What is Base64 JWT Decoder?

Free online JWT Decoder. Paste any JSON Web Token to instantly decode its header and payload securely in your browser.

How to use this tool?

Our Base64 JWT Decoder works entirely in your browser. All processing is done client-side, meaning your data never leaves your computer. Simply input your content, and the tool will provide instant results with premium accuracy.

Key Features

100% Private: Data stays in your browser.
Lightning Fast: Instant results as you type.
Zero Cost: Free to use forever.