Free tools
Check any website in seconds
Security, search tags, AI visibility, email and the platform behind it: five checks from our full audit, run together. No sign-up.
Takes 5–15 seconds. Or pick a single tool below.
Reading the page, testing 13 AI crawlers, looking up DNS and the certificate…
Or use one tool
AI crawler checker
Can ChatGPT, Claude, Perplexity and Google’s AI read the site, or do robots.txt or the firewall shut them out?
- 13 AI crawlers, one by one
- Search vs training bots
- Firewall blocks caught
Meta tag checker
See the page as a Google result and as a shared link, and check every tag behind them.
- Google result preview
- LinkedIn, Slack and X card
- Title and description lengths
SSL & security checker
HTTPS, the certificate’s expiry date, the five security headers, redirects and mixed content.
- Days until the certificate expires
- Each header explained
- robots.txt and sitemap
SPF & DMARC checker
Can scammers send email as the domain? Plus who handles its email and when the domain expires.
- SPF, DKIM and DMARC
- Mail and DNS provider
- Domain expiry date
Website platform detector
What any site is built with: CMS or builder, SEO plugin, page builder, shop, CDN and analytics.
- 20+ platforms recognised
- Plugins and builders
- The evidence for each answer
llms.txt checker
Does the site have an llms.txt file for AI assistants, and does it follow the format?
- Title, summary and links
- Sections counted
- llms-full.txt too
Before a sales call
Check a prospect’s site in seconds and open the call with something specific: the expiring certificate, the AI bots it blocks, the platform it runs on.
After a fix
Confirm a change is live: the new security header, the robots.txt edit, the DMARC record, the shorter title.
Share a link
Every tool takes ?url=, so a link like this one opens with the result already running.
https://mendmysites.com/tools/ssl-security-checker?url=example.com Questions
Are these really free?
Yes, with no sign-up. Each tool allows a handful of checks every ten minutes per visitor so the service stays fast for everyone.
Do you change anything on the site?
No. We only read what the site shows to everyone, the way a browser or search engine does.
Do you keep the results?
No. To stop abuse we log which domain was checked and a shortened, hashed form of your IP address, and delete those entries after 30 days.
What does the full audit add?
A 50-page crawl for broken links and missing tags, Google’s speed test with real-visitor data, a fix plan with steps for the site’s platform, white-label reports, weekly monitoring and proposals.
This is one of 50+ checks in a full audit
Run the complete audit free: SEO, speed, security, a 50-page crawl, AI visibility and email security, with a step-by-step fix plan for your platform. Share it with your clients under your own brand.
Run a full audit free