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HTTP Basic Auth Header Generator

Generate HTTP Basic Authorization headers from username and password values. Create Basic Auth headers, cURL examples, Fetch snippets, Axios snippets, and JSON header objects in your browser.

Credentials

Request Output

Optional. Used only for cURL, Fetch, and Axios output.

Safety note: Basic Auth is Base64 encoded, not encrypted by itself. Avoid using real production passwords unless you need to.

Options

Keep generated Authorization headers private. Basic Auth credentials can be decoded from the header value.

Output

Generated Basic Auth output will appear here.

Generating HTTP Basic Authorization Headers

HTTP Basic authentication sends a username and password as a Base64 encoded value inside the Authorization header. It is commonly used for quick API testing, internal tools, staging endpoints, legacy APIs, and simple protected resources.

This HTTP Basic Auth Header Generator creates the Authorization header and request snippets for cURL, Fetch, Axios, JSON, and plain header output directly in your browser.

Using the Basic Auth Header Generator

  1. Enter a username and password.
  2. Choose an output format such as plain header, cURL, Fetch, Axios, or JSON.
  3. Optionally add an endpoint URL and request method for request snippets.
  4. Review warnings about empty passwords, colons, and secret handling.
  5. Copy the generated output into your API client or test request.

Basic Auth Header Format

Authorization: Basic base64(username:password)

The encoded part is not encryption. It is only a Base64 representation of the credential string.

Basic Auth Should Use HTTPS

Because Basic Auth credentials can be decoded, Basic Auth should only be sent over HTTPS. Avoid logging generated headers, sharing screenshots with real credentials, or committing generated headers to code.

For production APIs, token-based authentication or short-lived credentials may be safer depending on the system.

Frequently Asked Questions

What does a Basic Auth header generator do?

It creates an Authorization header by joining username and password with a colon and Base64 encoding the result.

Is Basic Auth secure?

Basic Auth should only be used over HTTPS. The header value is Base64 encoded, not encrypted by itself.

Can I use this for cURL testing?

Yes. Choose cURL output to generate a ready-to-copy test command.

Should I paste real passwords here?

Avoid using real production passwords unless necessary. The tool runs locally, but careful secret handling is still a safer habit.

Is anything uploaded when I generate the header?

No. The header is generated directly in your browser.