
Mozilla Observatory
Hardenize
Qualys SSL Server Test
HTTP Observatory
Snyk
Sucuri Security Scanner
Detectify
Quickly and easily assess the security of your HTTP response headers.
Requestly
Charles Proxy
Fiddler
HTTP Toolkit
Header Editor
Proxyman.io
EditThisCookie
Free browser extension to modify HTTP request and response headers. No sign-up. Works on Chrome, Firefox, and Edge.

Which is more popular?
Based on our record, Security Headers seems to be more popular. It has been mentioned 70 times since March 2021.
Website, pricing, platforms and company facts side by side.
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modheader
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| Website | securityheaders.com | app.modheader.com |
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What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
Walkthroughs and reviews on video.
HTTP Security Headers | Part 01
More videos
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Security Headers and modheader. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

On the pricing front, Requestly strikes a balance between affordability and functionality. It is an open-source tool, offering freemium to individual developers and affordable pricing plans for team collaboration. We...
Recommendations tracked on public social media and blogs since March 2021.

Since we were back in the security settings anyway, Claude and I went through the whole guide: added headers, set up CSP with no inline scripts, no-store. The securityheaders.com score went from F to A+. - Source: dev.to / 18 days ago
Check: Go to securityheaders.com and enter your URL. A grade below B means you're missing important ones. - Source: dev.to / 5 months ago
The curl above is the fastest check; all four lines should come back. In a browser, DevTools, Network tab, click the document request, read Response Headers. For a letter grade, securityheaders.com scores you against a known rubric. One... - Source: dev.to / 5 months ago
Tracking modheader since Aug 2026.
When comparing Security Headers and modheader, you can also consider the following products.

The Mozilla Observatory is a project designed to help developers, system administrators, and security professionals configure their sites safely and securely.
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A Powerful API Mocking and Testing Tool
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Hardenize provides a comprehensive and free assessment of web site network and security configuration.
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HTTP proxy / HTTP monitor / Reverse Proxy
Compare Charles Proxy to Security Headers or modheader:
This free online service performs a deep analysis of the configuration of any SSL web server on the public Internet.
Compare Qualys SSL Server Test to Security Headers or modheader:

Fiddler is a debugging program for websites.
Compare Fiddler to Security Headers or modheader: