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Base64 Encoder/Decoder

Encode text or files to Base64, or decode Base64 strings back to plain text. Perfect for data encoding and embedding.

No uploads • Client-side only • Your data stays on your device

Base64 Encoder/Decoder workspace

Or Choose File to Encode or drag and drop

Maximum file size: 50MB

About Base64 Encoding:

  • Converts binary data to ASCII text format
  • Commonly used for embedding images in HTML/CSS
  • Used for transmitting binary data over text-based protocols
  • Increases data size by approximately 33%
  • Safe for URLs and email transmission

Common Use Cases:

  • Embedding images in HTML/CSS (data URIs)
  • Encoding binary files for transmission
  • API authentication tokens
  • Email attachments (MIME encoding)
  • Configuration files and serialization

Your Privacy Guaranteed

All processing happens directly in your browser using JavaScript. Your files, passwords, and data never leave your device and are never uploaded to our servers. We cannot see, store, or access anything you process with this tool.

No account required • No tracking • No data collection • Works offline after initial load