Basic Auth Generator
Generate a Base64-encoded HTTP Basic Authentication header from a username and password, with header and cURL examples. Runs in your browser.
How to use Basic Auth Generator: Open Basic Auth Generator — it runs entirely in your browser with no setup. Paste or type your input into the text area, or upload a file where supported. Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server. Everything runs inside your browser, so your data never leaves your device.
Generate a Base64-encoded HTTP Basic Authentication header from a username and password, with header and cURL examples. Runs in your browser. Basic Auth Generator is a free, browser-based tool in the Filevane developer tools collection — there is nothing to install, no account to create and no watermark on your results. It works on desktop, tablet and mobile, and because the work happens on your own device it stays fast even with large inputs.
How to use Basic Auth Generator
- Open Basic Auth Generator — it runs entirely in your browser with no setup.
- Paste or type your input into the text area, or upload a file where supported.
- Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server.
- Review the output instantly; large inputs are handled locally without lag.
- Copy the result to your clipboard or download it. Your data never leaves the page.
Why use Basic Auth Generator?
- 100% free with no limits, no sign-up and no watermarks.
- Private by design — your data are processed in your browser and never uploaded to a server.
- Fast and lightweight, with instant results even on a phone or a slow connection.
- Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
- Part of a full developer tools suite, so related basic auth tasks are one click away.
Is it private and secure?
Your privacy is built in. Basic Auth Generator runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.
Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.
You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.
Learn more
Is It Safe to Paste Production Data Into Online Tools? — JWTs, API responses and env files get pasted into online formatters every day. Here's what actually happens to that data and how to check before you paste.
Frequently asked questions
How does HTTP Basic authentication work?
The username and password are joined with a colon, Base64-encoded, and sent as the header Authorization: Basic <encoded>. The server decodes it and checks the credentials on every single request — Basic auth is stateless and carries no session.
Is Basic auth secure?
Only over HTTPS. Base64 is encoding, not encryption — anyone who can see the request can decode the credentials instantly. Over plain HTTP, Basic auth transmits the password in what is effectively clear text on every request.
Why is my header rejected when the password has non-ASCII characters?
Because the original specification did not define a character encoding, so a password containing accented or non-Latin characters can be encoded differently by client and server. RFC 7617 added a charset parameter for UTF-8; where it is not supported, restrict passwords to ASCII.
Should I use Basic auth in production?
It is reasonable for internal tools, health-check endpoints and machine-to-machine calls over TLS. For anything user-facing, prefer a token or session-based scheme — Basic auth cannot log out, cannot expire and offers no protection against credential replay.
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