Amumu Webtools

Free Online Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 to text. All processing in your browser.

Encode (Text → Base64) or Decode (Base64 → Text). UTF-8 safe. Option: auto-update as you type.

Auto-update as you type

What is Base64 Encoder/Decoder?

Base64 encoding converts binary or text data into a safe ASCII string. This tool lets you encode or decode Base64 entirely in the browser, with no data sent to any server.

How to Use This Tool?

Paste your text or Base64 string in the input. Choose Encode or Decode. The result appears instantly. Invalid Base64 will show an error.

  1. Paste or type your input in the tool area above.
  2. Adjust any options (format, encoding, etc.) if needed.
  3. Use the action buttons to format, convert, or process.
  4. Copy or download the result as needed.

100% Secure & Client-Side

All processing runs 100% in your browser. We do not upload, store, or transmit your data to any server. Your privacy and data security are guaranteed.

Frequently Asked Questions

Base64 is an encoding scheme that represents binary data as ASCII text. It is often used in URLs, emails, and APIs.