- Encoding
Base64URL vs Base64: when the extra characters matter
The + / = characters in standard Base64 break URLs, filenames, and JWT headers. Base64URL is the fix — and it's almost but not quite a drop-in replacement.
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Base64 explained: what it is, what it isn't, and when to use it
Base64 is everywhere — emails, JWTs, data URLs, certificates. Here's what it actually does, and what it doesn't (encryption!).
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