What are HTTP Headers?
Imagine sending a letter in the mail. The letter inside is the "Website Content," but the HTTP Headers are the information written on the envelope. They tell the postman (the browser) who sent the letter, how to open it, and most importantly, what security rules to follow. If the envelope doesn't have the right "Security Stamps," hackers can easily tamper with your mail.
HSTS Protocol
This header forces browsers to only connect via HTTPS. It's like locking the front door so no one can listen to your conversation.
CSP Policy
A Content Security Policy tells the browser exactly which scripts are allowed to run. It's the best way to stop Cross-Site Scripting (XSS) attacks.
Why you should audit your headers
Most web owners forget about headers because they are "invisible." But Google and security systems use them to judge your website's trust. Using a http headers analyzer like AirOI Checker helps you find missing security layers that could leave your users' data exposed to theft or malware.
Pro Tip: Hide Your Server!
Look at your "Server" header. If it says something like nginx/1.18.0, you are telling hackers exactly which software you use. It's safer to hide this version info so they don't know which exploits to try!
Frequently Asked Questions
What does an HTTP 200 status mean?
It’s the "Everything is OK" code. It means your browser asked for a page and the server successfully sent it back.
Can headers affect my SEO?
Yes! Correct 301 (Permanent Redirect) and 404 (Not Found) headers help Google crawl your site properly. Also, security headers improve user trust, which is a confirmed ranking signal.
Is this tool free for developers?
100% Free. AirOI Checker provides this audit tool so developers can verify their server configuration and keep the web safe for everyone.