HTTP Security Headers Checker — HSTS, CSP, Grade A-F

Broken Link Checker - Find Dead 404 Links

logiover/broken-link-checker

Site-wide broken link checker: crawl any website, find 404 and dead links, export the link audit to CSV or JSON with source page and status code.

Website HTTPS & SSL Health Checker

pillowy_travel/website-https-ssl-health-checker

Checks HTTPS availability and SSL certificate health for given URLs

HTTP Status Code Checker & Bulk URL Checker API

pink_comic/http-status-code-checker

Bulk URL checker and HTTP status scraper for SEO audits. Check status codes, 301/302 redirect chains, response times, content types, and broken URLs. Use the API for website status checks, migrations, monitoring workflows, and link QA.

Security Headers Checker API - HTTP Security Scanner

pink_comic/security-headers-checker

Security Headers Checker API for bulk HTTP security scans. Audit HSTS, CSP, X-Frame-Options, referrer and permissions policies, missing headers, website hardening gaps, and compliance posture. Returns grades, findings, and header evidence for security audits.

HTTP Probe -- TLS, Security Headers, Redirects

jungle_synthesizer/ssl-security-headers-checker

Bulk site-health probe: TLS certificate, security-header grading (CSP, HSTS, X-Frame-Options, Permissions-Policy + 5 others, A/B/C/D/F grade), redirect chain, TTFB, HTTP/2 + HTTP/3, IPv6 reachability. Built for devops, security, and CI pipelines.

Check common HTTP security headers for one or more URLs (Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COOP/COEP/CORP). Useful for quick security hardening audits.

Audit HTTP security headers for any URL: CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy. Returns a 0-100 score + letter grade + actionable findings. $0.005 per URL.

Security Headers Checker

s3nafps/security-headers-checker

Check public URLs for common HTTP security headers including HSTS, Content Security Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy. Export a simple website security header report as JSON or CSV.

Web Accessibility Checker

louisdeconinck/web-accessibility-checker

Audit your entire website for WCAG 2.1 & 2.2 compliance using the industry-standard axe-core engine. Automatically crawl pages, detect accessibility violations, and generate detailed actionable reports to ensure legal compliance and improve SEO.

HTTP Security Headers Analyzer

andok/security-headers-analyzer

Audit HTTP response headers (CSP, HSTS, X-Frame-Options) to verify web application security and compliance standards.