UWTools
Developer Tools

Base64 File Encoder / Decoder

Encode files to Base64 or decode Base64 back to a file in your browser.

—File size
—Base64 chars
—MIME type

Files are processed locally in your browser.

Base64 overhead

Base64 text is typically about one-third larger than the original binary data.

Encoding and decoding

The encoder outputs raw Base64 without a data URL prefix. The decoder accepts raw Base64 or a data URL.