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Base64url Encode — URL-Safe Base64 Encoding

Quick Answer: Base64url encoding replaces + with -, / with _, and removes = padding. This variant is required by JWT (RFC 7519), used in URL query parameters, and safe for filenames. Paste text to get the URL-safe encoded output.

FAQ

When do I need Base64url instead of Base64?

Use Base64url for JWTs, URL query parameters, filenames, and any context where + / = characters cause issues.

Can I convert standard Base64 to Base64url?

Yes. Replace + with -, / with _, and remove trailing = characters. The underlying data is identical.

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