How is Basic Auth encoded?

Concatenate user:password, Base64-encode, send as Authorization: Basic {value}.

Is Base64 encryption?

No — encoding only. Always use HTTPS.

Some APIs need Base64url — use URL encoder tools if +/= break your header.

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Encode username:password for HTTP Basic Auth and API headers. Safe patterns and free Base64 encoder.

Updated 2026-05-21

How is Basic Auth encoded?: Concatenate user:password, Base64-encode, send as Authorization: Basic {value}.
Is Base64 encryption?: No — encoding only. Always use HTTPS.
URL-safe Base64?: Some APIs need Base64url — use URL encoder tools if +/= break your header.