OmniToolsFree

Base64 encode and decode

Encode or decode text and files as standard or URL-safe Base64.

  • Text 5 MB
  • Files 20 MB
  • Runs in the browser

Your file is processed in this browser and is not uploaded by this tool.

How to use it

Three steps

  1. 01

    Choose encode or decode.

  2. 02

    Paste text or choose a file.

  3. 03

    Turn on URL-safe if you need Base64url. Copy or download the result.

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Questions

What is URL-safe Base64?

It uses - and _ instead of + and /, and this tool omits padding on encode. Padding is restored before decoding.

Will Unicode text survive a round trip?

Yes for text mode. It encodes UTF-8 bytes, not the raw JavaScript string.