Base64 Encoder & Decoder, text and files

Encode or decode Base64 without uploading.

Input
Output

How to base64 encoder/decoder with Berlvis

  1. 1
    Pick direction

    Encode or decode.

  2. 2
    Paste input

    Text or Base64 string.

  3. 3
    Copy output

    Result updates live.

About Base64 Encoder/Decoder

Berlvis Base64 handles both directions, text to Base64 and Base64 back to text, in your browser using the standard btoa/atob APIs with full Unicode support. Especially useful for API auth headers, data URLs and JWT debugging.

Frequently asked questions

+Is Base64 really free?

Yes. Every Berlvis tool is free, with no signup, no email and no daily quota.

+Do you upload my files or data?

Never. Your file stays in your browser, nothing is uploaded, nothing is logged, nothing leaves your device.

+Will it work on my phone?

Yes, anywhere there's a modern browser (Chrome, Safari, Firefox, Edge, Brave, Arc).

+How accurate is the calculation?

We use the same formulas you'd find in official guidance and primary tax/regulatory sources. Numbers are calculated client-side so what you see is what's used, nothing hidden.