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.
24 free tools · no credit card, ever
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.
No trial that expires. No "pro" tier hiding the good checks. No credit card field waiting at the end.
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.
- DNS Lookup
- SERP Checker
- WHOIS Lookup
- Google Index Checker
- Keyword Suggestion
- Keyword Density Checker
- SSL Checker
- Plagiarism Checker
- Subdomain Finder
- Website Status Checker
- Meta Tags Checker
- Wayback Checker
- Social Share Preview
- HTML Validator
- Domain Authority Checker
- Broken Link Checker
- SSL Grade Checker
- Readability Score Checker
- Blacklist & Malware Checker
- Redirect Chain Checker
- Schema Markup Validator
- Robots.txt Tester
- XML Sitemap Validator
- Favicon & Security.txt Checker
Your site, found.
Run your first audit in under a minute. It's free, and it stays free.