Base64 Encoder & Data URI Generator
Encode plain text, emojis, and binary files into Base64 format. Supports URL-Safe encoding and inline CSS/HTML Data URIs with 100% in-browser RAM privacy.
Frequently Asked Questions
How does Base64 encoding work?
Base64 is a binary-to-text encoding scheme that translates binary data into a sequence of 64 printable ASCII characters (A-Z, a-z, 0-9, +, /). It represents 6 bits of data per character, resulting in approximately a 33% size increase.
What is URL-Safe Base64?
Standard Base64 uses `+` and `/`, which have special meanings in URL query strings and path segments. URL-safe Base64 replaces `+` with `-` and `/` with `_`, stripping trailing `=` padding characters.
Does this tool support emojis and non-English text?
Yes. Our engine uses UTF-8 TextEncoder bytes rather than legacy 8-bit ASCII atob/btoa, guaranteeing full support for emojis (🎉), Arabic, Chinese, and European accented letters.