What Base64 is for
Base64 represents bytes using text-safe characters. It is common in data URLs, email MIME, API payloads and small configuration snippets. It is encoding, not encryption.
Example
The text "CalcMentor" encodes to "Q2FsY01lbnRvcg==". Decoding that Base64 string returns the original text.
Common mistakes
Do not treat Base64 as a security layer. Anyone can decode it. Also watch for missing padding characters at the end of copied strings.
Privacy note
The conversion runs locally in the browser, but you should still avoid pasting secrets or access tokens into tools unless you understand the processing context.
Last reviewed: 2026-05-17