Base64 Encoder / Decoder

Encode text or files to Base64, or decode Base64 strings back to original text. All processing happens in your browser.

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How It Works

Uses browser-native `btoa()` / `atob()` for text encoding/decoding and `FileReader` for files — completely client-side, no server upload.

  • Encode: Text or file → Base64 string
  • Decode: Base64 string → original text
  • Supports small files (images, text, etc.) – large files may be slow in browser