Base64 Converter

Convert text and files into Base64 encoded strings, or decode existing Base64 data back into its original format directly in your browser.

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Base64 Technical Standards

What is Base64?

Base64 is a binary-to-text encoding scheme. It represents raw binary data (like images or executables) as a printable string of ASCII characters. It is heavily used to embed files directly into HTML/CSS or safely transmit data over text-based protocols like HTTP or SMTP.

Unicode Support

Standard btoa() functions break when exposed to modern Unicode characters (like emojis or foreign languages). This engine uses URI encoding techniques to safely map all characters into binary arrays before converting them to Base64, preventing data corruption.

File Size Overhead

Encoding a file into Base64 increases its size by roughly 33%. This happens because Base64 uses 4 ASCII characters to represent every 3 bytes of binary data. Use it strategically for small assets, not massive videos.