Base64 Encode / Decode

Convert text to Base64 and back, with full Unicode support. You can also turn a small file into Base64 or a data URI.

Runs in your browser — nothing is uploaded
Mode
Max 5 MB. Stays on your device.

How to use Base64 Encode / Decode

  1. Choose Encode or Decode.
  2. Type or paste your text — the result updates instantly.
  3. Copy the result.

Questions

Is Base64 encryption?

No. Base64 is an encoding, not encryption — anyone can decode it. Don’t use it to protect secrets.

What is URL-safe Base64?

A variant that replaces “+” and “/” with “-” and “_” and drops the “=” padding, so the value can be used in URLs and filenames.

Is there a file size limit?

Files up to 5 MB can be encoded. Everything happens in your browser; files are not uploaded.