What is HTTP Basic Authentication?

HTTP Basic Authentication is a simple authentication scheme built into the HTTP protocol. The client sends an Authorization header containing the word 'Basic' followed by a space and a base64-encoded string of 'username:password'. It is widely supported and commonly used for API authentication and protecting simple endpoints.

How do I generate a Basic Auth header?

Enter your username and password in the Encode tab. The tool base64-encodes the combined string 'username:password' and formats it as 'Authorization: Basic '. Copy the full header or use the ready-to-use curl and JavaScript fetch() snippets.

Is HTTP Basic Auth secure?

HTTP Basic Auth transmits credentials as a base64-encoded string — not encrypted. Base64 is trivially decoded. Always use Basic Auth over HTTPS (TLS/SSL) to prevent credentials from being intercepted. Never use it over plain HTTP in production environments.

Are my credentials sent to your server?

No. All encoding and decoding happens entirely in your browser using built-in JavaScript APIs (btoa/atob). Your username and password never leave your device.

How do I decode a Basic Auth token?

Switch to the Decode tab, paste the raw base64 token, the full Authorization header value, or the string after 'Basic ', then click Decode. The tool reveals the original username and password.

Free Developer Tool

Generate HTTP
Basic Auth Headers

Instantly encode username + password into a valid Authorization: Basic header — or decode any token to reveal credentials. Nothing leaves your browser.

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Instant Encoding

Type username and password, get your Authorization: Basic header in milliseconds — ready to paste anywhere.

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Easy Decoding

Paste any Basic Auth token to instantly decode and inspect the embedded credentials.

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Ready-to-Use Snippets

One-click copy for the header value, curl command, and JavaScript fetch() example.

Username

Password

Enter a username and password to generate your Basic Auth header.

Frequently Asked Questions

Everything you need to know about HTTP Basic Auth Generator.

Generate HTTPBasic Auth Headers

Instant Encoding

Easy Decoding

Ready-to-Use Snippets

Frequently Asked Questions

Generate HTTP
Basic Auth Headers