Base64 Encode / Decode

Encode text to Base64 or decode Base64 back to plain text.

Input data is processed in your browser
Data is never sent to a server

Tool

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or drag & drop a file

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What is Base64?

Base64 is an encoding scheme that converts binary data or text into an ASCII string. It is widely used for email attachments, data URIs, and API data transfer.

How to Use

  1. Enter the text you want to convert in the input field.
  2. Click "Encode" or "Decode".
  3. The result appears in the output field.
  4. Click "Copy Result" to copy to clipboard.

FAQ

Is this tool free?

Yes, it is completely free to use.

Is my data sent to a server?

No. All processing happens in your browser. Nothing is sent to a server.

Does it support Japanese and Unicode characters?

Yes. It supports Unicode strings including Japanese. The input is encoded as UTF-8 internally.