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