Convert text or files to and from Base64, with full UTF-8 handling and a Base64URL option for tokens and query strings. You can swap input and output, download decoded files, and read clear validation messages along the way. Worth remembering: Base64 is encoding, not encryption — and none of it leaves your device.
Base64 Encoder and Decoder is a quick, no-nonsense developer utility that runs entirely client-side, so your code and data never leave your machine.
No. Base64 is a reversible encoding, not encryption. Anyone can decode it, so never use it to protect secrets.
A URL-safe variant that replaces + and / with - and _ so the output is safe in URLs and filenames.
Yes. Switch to File mode to encode a file to Base64, or decode Base64 back into a downloadable file.
Base64 is encoding, not encryption