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What is Base64?
Base64 represents bytes using text-safe characters so data can move through text-only channels.
Last updated 2026-07-12 · 3 min read
Encoding is not encryption
Base64 hides nothing. Anyone can decode it, so do not treat it as a security boundary.
Base64URL
Base64URL replaces URL-sensitive characters and is used in JWT segments and web-safe identifiers.