Basic Auth Header Generator
Network & Ops · Free Online Tool
Generate Authorization: Basic header from username/password.
Authorization: Basic YWRtaW46czNjcmV0
Basic Auth sends credentials as a Base64-encoded string that is trivially decodable. Always pair it with HTTPS — never with plain HTTP.
Base64 Encoding
Uses native btoa to encode user:pass.
Ready-to-use Header
Output includes the full Authorization: prefix — paste into curl or fetch.
One-click Copy
Copy the header to clipboard instantly.
How to Use Basic Auth Header Generator
- 1Enter the URL, IP address, or network parameter to look up.
- 2Click the lookup or test button.
- 3Review the detailed results in the output panel.
- 4Use the information for your network operations.
Features
- ✓100% free — no signup, no subscription, no ads
- ✓Runs entirely in your browser — data never leaves your device
- ✓Fast and lightweight — instant results
- ✓Cross-platform — works on desktop, tablet, and mobile
Frequently Asked Questions
Are network lookups real-time?
Yes, IP lookups, DNS queries, and HTTP tests perform live network requests to provide current data.
Is my IP address logged?
The IP Lookup tool queries public geolocation APIs. We do not store your IP address or lookup history.
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Learn the concept
Learn the concept
Understand the programming ideas behind this tool.