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Base64 Encode & Decode

Convert text to Base64 and back — UTF-8 safe, free, and 100% in your browser. Because nothing is uploaded, it's safe for tokens and secrets.

🔒 100% private — encoded/decoded in your browser, never uploaded.

What is Base64?

Base64 is a way of representing binary or text data using only 64 safe characters (A–Z, a–z, 0–9, + and /). It’s widely used to embed data in URLs, JSON, emails, data-URIs and config files where unusual characters could otherwise break things.

How to use it

  1. Encode: paste your text in the input and press Encode →.
  2. Decode: paste Base64 in the input and press Decode ←.
  3. Copy the result with one click.

Why a private, in-browser tool matters

Developers often decode JWTs or API tokens that contain sensitive data. Pasting those into a random website that uploads them is risky. ToolFern does everything locally in your browser, so your tokens and secrets never leave your device.

Frequently asked questions

Is it safe for secrets?

Yes — nothing is uploaded; it all runs in your browser.

Does it support Unicode?

Yes, it’s UTF-8 safe, so emoji and accents work.