HTTP Headers Checker - Check HTTP Headers Online

Check the website's HTTP headers and security headers

Enter URL

Security Headers important

Strict-Transport-Security (HSTS)

Mandatory use of HTTPS

Content-Security-Policy (CSP)

Prevent XSS and injection attacks

X-Frame-Options

Prevent clickjacking

X-Content-Type-Options

Prevent MIME type sniffing

HTTP Headers Checker - Professional Free Online Website Security Headers Checker

Tan Phat Digital's free tool to check HTTP headers and security headers of online websites. Full analysis of response headers: Content-Type, Cache-Control, Set-Cookie, Server, X-Powered-By. Evaluate important security headers: Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options, X-Content-Type-Options, X-XSS-Protection, Referrer-Policy, Permissions-Policy. Calculate security score from 0-100 based on present/missing headers. Sort headers by category: security, cache, content, CORS. Display status with icons: good (green), warning (yellow), missing (red). Suggested detailed security improvements for each missing header. Copy results for reporting. Useful for security audit, penetration testing, web development.

Outstanding features

Check all HTTP response headers of URL
Evaluate the 7 most important security headers
Calculate Security Score from 0-100 points
Display HTTP Status Code (200, 301, 404, 500...)
Headers classification: Security, Cache, Content, CORS, Other
Status icons: Good (✓), Warning (⚠), Missing (✗)
Explain the meaning of each security header
Suggested improvements for missing or weak headers
Copy all headers to report
Display full header values ​​
Check CORS headers: Access-Control-*
Check Cache headers: Cache-Control, ETag, Expires
No need to log in, completely free

Why is it necessary to check HTTP Security Headers?

HTTP Security Headers are the first line of defense protecting websites from common attacks. Lack of security headers makes the website vulnerable to: XSS (Cross-Site Scripting) - hackers inject malicious scripts into the page. Clickjacking - website embedded in an iframe to trick users into clicking. MIME sniffing - browser misunderstands content type, executes malicious code. Man-in-the-middle - traffic is intercepted when HTTPS is not enforced. Data leakage - sensitive information is sent through the Referrer header. According to OWASP, missing security headers are in the Top 10 Web Security Risks. Google also prioritizes websites with HTTPS and security headers in ranking. This tool helps you quickly audit your website's security posture, detect missing headers, and know how to fix them.

Benefits when used

  • •Audit website security in seconds
  • •Detect missing or misconfigured security headers
  • •Understand the meaning of each header to fix
  • •properly Improved security score for compliance (PCI-DSS, SOC2)
  • •Increase SEO ranking - Google prioritizes secure sites
  • •Protect users from XSS, clickjacking, MITM attacks
  • •Report to stakeholders with clear results
  • •Compare with competitors in terms of security posture

How to check website's HTTP Headers

  1. 1Enter the full URL of the website to test (https://example.com)
  2. 2Click the
  3. 3button to send request
  4. 4See HTTP Status Code - 200 is OK, 301/302 is redirect
  5. 5See Security Score - target 80+ points
  6. 6Check each Security Header - green means present, red means missing
  7. 7Read the explanation and recommendations for missing headers
  8. 8See other headers: Cache, Content, CORS
  9. 9Copy the results to send to the dev team or report
  10. 10Implement missing headers according to recommendations
  11. 11Check again after deploying to verify

Cooperate immediately with Mavis Digital

We not only design websites, but also help businesses build strong digital brands. Providing comprehensive website design services from design to SEO optimization. Please contact Mavis Digital immediately to create breakthrough, effective and sustainable technology solutions for your business in Ho Chi Minh.

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