Generate Basic Auth headers from credentials instantly. View Base64 output, header text, and decoded samples. Use practical exports for audits, docs, training, and testing.
| Username | Password | Raw Credentials | Base64 Value | Authorization Header |
|---|---|---|---|---|
| aladdin | open sesame | aladdin:open sesame | YWxhZGRpbjpvcGVuIHNlc2FtZQ== | Authorization: Basic YWxhZGRpbjpvcGVuIHNlc2FtZQ== |
| apiuser | secret123 | apiuser:secret123 | YXBpdXNlcjpzZWNyZXQxMjM= | Authorization: Basic YXBpdXNlcjpzZWNyZXQxMjM= |
| admin | P@ssw0rd! | admin:P@ssw0rd! | YWRtaW46UEBzc3cwcmQh | Authorization: Basic YWRtaW46UEBzc3cwcmQh |
Raw Credentials = Username + ":" + Password
Base64 Value = base64_encode(Raw Credentials)
Authorization Value = "Basic " + Base64 Value
Authorization Header = "Authorization: " + Authorization Value
Header Length = total characters in the full header string
A Basic Auth header calculator helps developers, testers, students, and security teams create a valid HTTP Authorization header quickly. It joins a username and password with a colon. It then encodes that value with Base64. The result becomes a header for APIs, admin panels, staging systems, and internal tools.
The format looks simple. Small mistakes still cause many failed requests. A missing colon breaks the payload. An extra space changes the encoded output. This calculator reduces those errors. It shows the raw credential string, encoded token, full header, and a request example. That makes debugging faster and cleaner.
Use this calculator when an endpoint expects the Authorization: Basic format. It is useful for REST APIs, webhooks, routers, lab systems, proxies, and temporary development environments. It also helps during authorized security reviews. Teams often use it while checking API clients, cURL commands, monitoring jobs, and integration scripts.
Basic authentication is not encryption. Base64 only transforms text. Anyone who can read unprotected traffic can decode it. Always send Basic Auth over HTTPS. Avoid storing live production passwords in screenshots, logs, tickets, or exported files. Good handling habits matter in cybersecurity and software delivery.
This page calculates the credential pair, Base64 output, full Authorization header, header length, and decoded preview. It also creates a reusable request example. The CSV export supports documentation. The PDF export supports handoffs, reviews, and audit notes. These details make repeated testing more consistent.
Header accuracy matters because authentication failures can hide larger issues. A clean header lets you verify permissions, reproduce requests, compare environments, and document expected behavior. Common mistakes include encoding each field separately, copying only the token, adding spaces before the colon, or using stale credentials. This calculator helps learners understand the format and helps experienced teams work faster during approved testing and troubleshooting.
It is only safe over HTTPS. Base64 is not encryption. Anyone who can read plain traffic can decode the credentials quickly.
The calculator encodes the combined string username:password. It does not encode the username and password separately.
Yes. Many APIs, admin tools, proxies, and staging endpoints accept an Authorization header that uses the Basic scheme.
Yes. The encoded value still includes the colon. For example, user: remains a valid input format.
Common causes are wrong credentials, a missing Basic prefix, extra spaces, hidden newline characters, or an endpoint that expects another auth method.
Yes. Base64 is reversible encoding, not encryption. Treat any exported or copied header as sensitive data.
Only with approved teammates and sanitized values. Exports can reveal credentials, endpoints, or internal testing patterns.
No. It is a formatting and testing helper. It does not replace a password manager or a secure vault.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.