Base64url Encode / Decode

Base64 is encoding, not encryption — anyone can decode it.

Encode Decode

Base64url encoder/decoder — free, no upload (FAQs)

FAQs

Is base64url padded?: No, padding is removed for base64url.
Are + and / used?: Replaced by - and _ respectively.

Base64URL encoding FAQs

FAQs

Base64 vs Base64URL?: Base64URL replaces +/ with -_ and usually omits padding to be URL-safe.
Why no = padding?: Padding is optional in Base64URL and often removed for brevity; decoding can infer length.
When to use Base64URL?: Use in URLs, JWT, and systems where + and / are problematic.