Base64 Encoder

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

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How to Use

  1. Paste text into the input field
  2. Click "Encode" or "Decode"
  3. Swap input and output if needed
  4. Copy the output when ready

Features

  • Client-side encoding for privacy
  • UTF-8 safe encoding and decoding
  • One-click swap between input and output

What Base64 Is (and Is Not)

Base64 is an encoding format for representing binary data as text characters.

Base64 is not encryption and does not protect confidentiality.

Practical Notes

  • Standard Base64 often uses = padding; URL-safe Base64 uses a related alphabet.
  • Encoded output is typically larger than the original input.
  • This tool runs fully in your browser and does not upload your text.

References