What is Base64 Encoding?
Base64 encodes binary data into ASCII text using 64 characters. It is widely used to embed images in HTML/CSS, encode API credentials, and transmit binary data through text-based protocols. Our tool encodes and decodes with full UTF-8 support, entirely in your browser.
Frequently Asked Questions
Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode it. Do not use it to protect sensitive data.
Why does it increase file size?
Base64 uses 4 characters for every 3 bytes, resulting in ~33% size increase.
Does it support Unicode?
Yes. Full UTF-8 support including emoji and characters from all languages.