Is Basic Auth encrypted?

No. Base64 is reversible encoding, so transport must use HTTPS.

Can a password contain colons?

Yes. Only the first colon separates the username from the password.

Can a username contain a colon?

No. RFC 7617 decoding would become ambiguous.

Are credentials uploaded?

No. Encoding and decoding run in this browser.

Basic Auth Header Generator

Generate or decode UTF-8 HTTP Basic Authorization headers locally.

Local browser processing

Your input is processed only in this browser and is not uploaded, stored, or proxied.

Base64 is not encryption. Use HTTPS for Basic authentication.

Mode

Generate

Input

Password

Result

What this tool does

HTTP Basic authentication Base64-encodes a username, colon, and password into an Authorization header. This tool generates or decodes that value locally and reminds you that Base64 provides no confidentiality without HTTPS.

How to use it

Enter or import the content you want to process.
Choose the required options and run the tool.
Review the output and limitations, then copy or download it.

Capabilities and limitations

This tool uses UTF-8 credentials, rejects colons in usernames, masks password input, and hides decoded passwords unless you explicitly reveal them. Base64 is reversible encoding; use HTTPS and do not treat the result as encrypted.

Related tools

Base64 Encoder Password Generator

Frequently asked questions

Is Basic Auth encrypted?: No. Base64 is reversible encoding, so transport must use HTTPS.
Can a password contain colons?: Yes. Only the first colon separates the username from the password.
Can a username contain a colon?: No. RFC 7617 decoding would become ambiguous.
Are credentials uploaded?: No. Encoding and decoding run in this browser.