🌠Web & SEO
21 free web & seo — DNS lookup, IP info, HTTP headers, meta tag checker, robots.txt tester, sitemap validator, keyword density and more. Live data, no sign-up required.
🌠IP Address Lookup
Find your public IP address and geolocation instantly — or look up any IP address to see its country, city, ISP, and coordinates. No sign-up, completely free, results in under a second.
🚀 Website Speed Test
Test website loading speed and get Core Web Vitals metrics. Check LCP, CLS, FID, TTFB, and page size — free online website speed analyser.
🔠Website SEO Checker
Free SEO analysis tool. Score your site across 30+ checks — title tags, meta, headings, speed, security headers, Open Graph, Twitter Card, JSON-LD schema, AEO readiness, robots.txt, sitemap, and more. Download PDF report.
🔠DNS Lookup
Look up DNS records for any domain: A, AAAA, MX, CNAME, TXT, NS, and SOA. Troubleshoot DNS propagation and email setup — free online DNS lookup.
📋 HTTP Status Codes
Complete HTTP status code reference: 1xx, 2xx, 3xx, 4xx, 5xx codes with descriptions and when to use each. Searchable and filterable — free online guide.
🌠Subnet Calculator
Calculate subnet ranges, broadcast addresses, host counts, and wildcard masks from any CIDR notation. IPv4 and IPv6 subnetting — free online tool.
âœ‰ï¸ Email Validator
Validate email addresses individually or in bulk. Check format, MX records, and disposable domains — free online email validation tool.
🔒 Password Strength Checker
Check password strength instantly with detailed scoring. See time-to-crack estimates and get improvement suggestions — free, no password ever sent to servers.
🟢 Server Status Checker
Check if any website or server is up or down right now. See HTTP status code, response time, and server headers — free online uptime checker.
📡 HTTP Header Checker
Analyse HTTP response headers for security, caching, and performance. Paste raw headers or fetch live from any URL — free online header checker.
💻 MAC Address Lookup
Look up the manufacturer (OUI) of any MAC address. Identify network device vendors from the first 6 digits of any hardware address — free online tool.
📈 UTM Builder
Build UTM tracking URLs for Google Analytics, Meta Ads, and email campaigns. Auto-validate and copy the complete tagged URL — free online UTM builder.
📊 Keyword Density Checker
Analyse keyword frequency and density in any text. See top keywords, bigrams, and trigrams with percentage and count — free online keyword density tool.
🔠User Agent Parser
Parse any user agent string to identify browser, OS, device type, and rendering engine. Detect bots and crawlers — free online user agent analyser.
📊 Open Graph Preview
Preview how your page looks when shared on Facebook, Twitter/X, LinkedIn, and WhatsApp. Test Open Graph and Twitter Card meta tags — free online OG previewer.
ðŸ·ï¸ Meta Tag Checker
Check a URL's meta tags for SEO completeness and correctness. Analyse title, description, canonicals, robots, and OG tags — free online meta tag checker.
📋 Schema Markup Validator
Validate JSON-LD schema markup for syntax errors and required field completeness. Test rich result eligibility for FAQ, HowTo, and Product — free online.
🔗 Link Extractor
Extract all links from any URL or HTML content. See internal, external, and broken links with anchor text and status codes — free online link extractor.
✅ Sitemap Validator
Validate XML sitemaps for proper format, required tags, and URL count. Check for errors before submitting to Google Search Console — free online.
📠Page Size Checker
Check the total page size, number of HTTP requests, and resource breakdown of any URL. Identify what's making your page slow — free online page size analyzer.
🤖 Robots.txt Tester
Test which URLs are blocked or allowed by your robots.txt. Enter a URL and user-agent to check access rules — free online robots.txt tester.
About Web & SEO
21 web and network diagnostic tools for developers, SEO professionals, and site owners. Look up IP addresses and DNS records, check HTTP headers and server status, validate meta tags and robots.txt, analyse keyword density, and test site speed — all using live data fetched in real time directly from the target server.
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Frequently Asked Questions
Are these web diagnostic tools free?
Yes. All tools on this page are completely free with no sign-up, no API key, and no usage limits for standard queries.
How current is the data from these web tools?
The tools fetch live data in real time. DNS records reflect current propagation state (which can take up to 48 hours after a change). HTTP headers and server status reflect the current server response at the moment of the request.
Why might results differ from other tools?
Results depend on live server state, geographic DNS resolver location, and CDN caching. If you see inconsistencies, wait a few minutes and re-run — DNS propagation and CDN caches update continuously.
Do these tools work on private/internal networks?
No. These tools query publicly reachable servers and DNS resolvers. Internal domains, private IPs, and localhost addresses are not accessible from a browser-based tool without a local proxy.
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