About
HTTP Observatory is a Mozilla tool that scans a website’s HTTP headers and related security settings to check compliance with common security best practices.
It provides automated findings and actionable feedback for developers and site administrators who want to review header-based protections and other basic web security configurations.
- HTTP header security assessment
- Automated compliance checks
- Actionable security feedback
- Mozilla-developed observatory tool
- Website security configuration review
Free Tier Value
This is a permanently available, free public HTTP header scanner with no signup and no paid tier found anywhere on the site - unbounded rather than a capped allowance.
What's included in the free tier
Verified
- Free and unlimited HTTP security header scanning with actionable recommendations for any public website.
Common questions
Is HTTP Observatory free forever?
Yes. HTTP Observatory is free forever, with no time limit and no usage threshold that forces a paid plan.
What is HTTP Observatory's free tier worth?
HTTP Observatory's free tier has no dollar cap - it's unlimited, with no usage threshold that forces a paid plan. That maps to an FTV score of 90/100. The FTV score is explained at freetier.co/ftv.