Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings back to plain text. Everything runs in your browser.

Input
Output

How to Use

  1. Paste your text or Base64 string into the input box.
  2. Click Encode to convert to Base64, or Decode to convert back.
  3. Copy the result.

Common Use Cases

  • Encoding binary data for JSON or XML transmission
  • Embedding images as inline Base64 in HTML/CSS
  • Encoding credentials for Basic HTTP Authentication
  • Decoding JWT payload data for inspection