Base64 Encoder / Decoder

Encode and decode Base64 strings with full UTF-8 support. Your text is processed entirely inside your browser. Handles emoji and international characters.

Encode or Decode Base64

Paste your text, choose encode or decode, or toggle auto-conversion

Characters: 0

How It Works

  1. Paste your text in the input area
  2. Click Encode to convert to Base64
  3. Click Decode to convert back to plain text
  4. Copy or download the output

Common Use Cases

  • Embed images in HTML/CSS as data URIs
  • Encode binary data for API transmission
  • Store complex data in text formats
  • Transfer data through text-only systems

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Frequently Asked Questions

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is commonly used for transmitting data over media that are designed to handle textual data.

Does this tool support UTF-8 characters?

Yes. The tool properly handles UTF-8 characters and non-ASCII text by first encoding the string as UTF-8 before applying Base64 encoding. This ensures emoji and international characters work correctly.

What happens if I try to decode invalid Base64?

The tool will show an error message if the input is not valid Base64. It validates the input before attempting to decode and handles errors gracefully.

Is my text uploaded to a server?

No. All processing happens entirely in your browser. Your text never leaves your device.