Where good sites get found.
The free alternative to paid SEO suites. Audit your site across 24 checks, research keywords and domains, and fix technical issues — no credit card, no locked results.
Results in under a minute · a free product by OpenLoop
SEO
6/7 passed
Performance
4/5 passed
Security
5/5 passed
Best Practices
6/6 passed
Everything you need to get found.
The essentials of technical SEO, without the $99/month gatekeeping.
Every check. One score.
Paste a URL and get graded across 24 checks — meta tags, speed, SSL, headers, mobile-readiness — grouped into four clear categories.
Run a Site AuditAsk AI. Your key, your rules.
Bring your own ChatGPT, Claude, Gemini, or DeepSeek key and get a prioritized, plain-language action plan for any audit.
Free means free.
One toolbox. Zero tabs of pricing pages.
DNS, WHOIS, SSL grades, SERP position, keyword density, subdomains, the Wayback Machine — it's all here, and it all works without an account.
“Search engine optimisation should be free for the people who need it most — not priced for the people who need it least.”
Why OpenLoop built SEO Loop
Pick a tool. Get an answer.
- SERP Checker
- DNS Lookup
- Keyword Density Checker
- Keyword Suggestion
- Google Index Checker
- WHOIS Lookup
- Plagiarism Checker
- Website Status Checker
- SSL Checker
- Subdomain Finder
- Domain Authority Checker
- Meta Tags Checker
- Wayback Checker
- Social Share Preview
- HTML Validator
- SSL Grade Checker
- Broken Link Checker
- Redirect Chain Checker
- Schema Markup Validator
- Blacklist & Malware Checker
- Robots.txt Tester
- Favicon & Security.txt Checker
- Readability Score Checker
- XML Sitemap Validator
Your site, found.
Run your first audit in under a minute. It's free, and it stays free.