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Basic Auth Header Generator

Build an HTTP Basic Authorization header from credentials.

Header
Authorization: Basic YWRtaW46czNjcjN0
Encoded Credentials
YWRtaW46czNjcjN0

How HTTP Basic Auth works

HTTP Basic Authentication sends credentials in an Authorization header as Basic <base64(user:password)>. Base64 is encoding, not encryption — anyone who intercepts the header can trivially decode it, so Basic Auth must only be used over HTTPS. This tool builds the header locally in your browser; your credentials are never sent anywhere.

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