Is Base64 a form of encryption?

No. Base64 is an encoding, not encryption. Anyone can decode it. Never use Base64 to hide sensitive data.

Why is the Base64 output longer than the input?

Base64 uses 4 output characters per 3 input bytes, plus padding. Expect output roughly 33% larger than the original.

Yes. Drop any file into the file input and the tool returns a complete data URL you can paste into HTML or CSS.

A variant that replaces + and / with - and _ so the string can be used in URLs and filenames without escaping.

Encoders

Encode text to Base64, decode Base64 to text, or convert files to data URLs. Everything runs in your browser.

Mode:

Text Input

Base64 Output

Output will appear here

Choose File