Base64 Encoder/Decoder
Encode and decode Base64
How Base64 Encoding and Decoding Works
The Base64 Encoder/Decoder converts data between its original form and Base64 representation. Base64 encoding transforms binary data into ASCII text using a 64-character alphabet, making it safe for transmission through text-based protocols like email, JSON, and HTML.
Formula
Encoded size = 4 * ceil(input bytes / 3) \u2014 approximately 133% of original size
Key Features
- ✓Encode text or files to Base64 format instantly
- ✓Decode Base64 strings back to their original content
- ✓Support for UTF-8 text and binary file encoding
- ✓One-click copy for quick integration into code or APIs
Pro Tip
Base64 encoding increases data size by approximately 33%. Use it for embedding small images in CSS or HTML, but for larger files, consider direct file hosting instead.
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