Website problems you can't see from the inside
Each page explains the problem, how to check it yourself for free, and what a Preventionlabs report shows.
- How do I know if my website is working?
- How do I stop missing website problems?
- How do I monitor my website without being a developer?
- How do I take control of my own website?
- Which Cloudflare rule is blocking my visitors?
- What changed right before my website broke?
- Why are my website contact form emails going to spam?
- Google shows spam for my site, but the site looks fine
- Website monitoring for freelancers who look after client sites
- Is a secret API key exposed in my website code?
- Is phpMyAdmin or a debug tool open to anyone on my site?
- My missing pages return 200 OK instead of 404
- My website calls an API address that no longer exists
- Is my website hidden from Google by mistake?
- Pages in my sitemap return errors or redirects
- Is my robots.txt blocking ChatGPT and other AI crawlers?
- Do all versions of my web address go to the same place?
- My website doesn't work for some visitors: is it IPv6?
- Is DNSSEC set up properly on my domain?
- My MX record points at a mail server with no address
- When does my domain expire, and is it locked?
- Is my Cloudflare SSL mode set wrong?
- My website traffic dropped from one country
- My live site isn't showing my latest deploy
- Why are my Cloudflare Workers failing?
- Is my Shopify store still showing the password page?
- Did I leave placeholder text or test links on my live site?
- Is my security.txt file missing or expired?
- Cloudflare error 1026 and HTTP 451: why is my own site blocked?
- My DMARC is set to p=none: is that enough?
- Why are bots requesting /.env and /wp-login.php on my site?
- Are my WordPress plugins out of date?
- Is my Shopify cart working?
- Are my Shopify products showing as in stock?
- Which pages on my site return errors to visitors?
- When does my Cloudflare SSL certificate expire?
- Did someone change my DNS records?
- What is wrong with my website?
- Free website health check
- Why is my favicon not showing?
- Is my DNS set up properly?
- How do I find broken links on my website?
- Is my website missing security headers?
- What is making my website slow?
- Are my website cookies set securely?
- Why does my link preview look wrong?
- Do my pages have duplicate titles or missing descriptions?
- Do my images have alt text?
- Is my website's language set correctly?
- Does my website have structured data?
- Is my ads.txt file set up?
- Does my website have an llms.txt file?
- Does my domain have CAA records?
- Is my WordPress site up to date and secure?
- How do I find JavaScript errors on my website?
- Can anyone download my website backup files?
- Is old JavaScript on my website a security risk?
- My website has errors I can't see. How do I find them?
- Who changed my Cloudflare settings?
- How do I check a website before taking on a new client?
- Is my .env file visible to the public?
- Can people see my website's .git folder?
- Can people see my WordPress usernames?
- Can someone take over my old subdomain?
- My SSL certificate expired and I didn't know. How do I stop it happening again?
- My Shopify store looks fine but nobody can buy. What's wrong?
- How do I know if my website is secure, without a developer?
- How do I get told when a client's website breaks?
- My website got slow after AI changes. How do I find out why?
- My AI built my website. How do I know it's working?
- How do I check a website built with AI?
- How do I check what my AI deployed?
- AI said it fixed my website, but it's still broken. What now?
- Did AI break my website?
- How do I make Claude Code check my website after a deploy?
- Why can't my AI agent see my live site?
- AI broke my redirect. How do I find it?
- AI broke my SSL. How do I check HTTPS?
- AI broke my email records. How do I check SPF and DMARC?
- Did AI leave my .env file public?
- Did AI remove my security headers?
- Did AI add noindex to my site?
For error codes and messages, see the fix guides.