Free SEO and webmaster tools built by 365i for checking headers, DNS, meta tags, and more.
We build free tools because they solve problems we run into ourselves. Checking HTTP security headers, inspecting DNS records, scanning for mixed content, previewing meta tags before publishing. Quick checks that used to mean digging through browser dev tools or running command-line queries.
These articles announce new tools, explain how to use them, and show what the results mean. All eight tools are free, run in your browser, and don't require an account. They're powered by a Cloudflare Worker backend, so they're fast from anywhere.
Your WordPress site is being probed by bots right now. Our free scanner checks eight things attackers look for, grades your site A+ to F, and tells you how to fix every issue. No plugin, no signup, 30 seconds.
Most hosting companies sell you a server and disappear. 365i does things differently. From personalised screencast tutorials to one-click DKIM setup and 37 built-in control panel tools, here's what WordPress hosting looks like when someone actually cares whether you succeed.
The AI Discovery Files plugin is now on WordPress.org. Free, no premium tier. Fill in your business details and it generates up to 10 AI discovery files for ChatGPT, Claude, and Perplexity. The more you put in, the better the output.
56% of deployed AI discovery files fail validation. The files exist, the server returns 200 OK, and AI systems still can't use them. Here's how to test what AI actually sees when it reads your files, fix the three most common failures, and prove your business shows up correctly.
Your XML sitemap is the best inventory of what Google knows about your site. Our free Post Sitemap to CSV tool discovers every sitemap, fetches all page titles, and exports the lot as a spreadsheet. No sign-up, no page limits.
Over 150,000 domains expire every day. Our free WHOIS Lookup tool queries RDAP servers to show registration dates, expiry, nameservers, EPP status codes, registrar info, and DNSSEC for any domain. No sign-up needed.
73% of websites have robots.txt errors that hurt their search visibility. Our free Robots.txt Checker parses every crawl rule, lets you test URL paths against them, and flags the mistakes that block search engines and AI crawlers from your best content.
One HTTP image on an HTTPS page is all it takes to kill your padlock icon and trigger browser warnings. Our free mixed content scanner checks your pages in seconds, grades your SSL setup A to F, and shows you exactly which resources need fixing.
Your emails might not be arriving, and your domain's DNS could be the reason. Our free DNS Lookup tool checks every record type, grades your SPF, DKIM, DMARC, MX and DNSSEC setup, and flags problems in under 10 seconds. No sign-up required.
Your SSL padlock doesn't protect against clickjacking, XSS, or downgrade attacks. Security headers do. Our free HTTP Header Inspector grades your headers A to F, traces redirect chains, and flags server version leaks. Here's what to check and how to fix it.
We built eight free SEO tools and gave them away. HTTP header grading, DNS health checks, HTTPS inspection, meta tag analysis, robots.txt testing, WHOIS lookups, WordPress security scanning, and sitemap-to-CSV export. No sign-up, no limits, no catch.
Google rewrites 61% of title tags. Social platforms grab whatever they can find when OG tags are missing. Our free Meta Tag Checker shows you exactly how any page looks in Google results and social feeds, then flags the issues costing you clicks.
