How to Check an SSL Certificate and Fix 'Not Secure'
To check an ssl certificate and fix 'not secure', open the free SSL Checker on pdfseotools.com, enter the website URL in the box, then run the tool and download or copy the result. It takes under a minute, works on mobile and desktop, and needs no sign-up.
What Is SSL Checker and Why Use It?
An SSL certificate enables HTTPS, encrypting data between visitors and your site. HTTPS is a Google ranking signal and builds trust.
Check the SSL certificate of any website – issuer, validity and expiry date.
You can use it for tasks such as: checking certificate expiry, fixing 'not secure' warnings, security audits, after installing ssl.
How to Check an SSL Certificate and Fix 'Not Secure' – Step-by-Step
Follow these 4 simple steps. Each step takes only a few seconds.
Step 1: Enter the website URL in the box
Enter the website URL in the box. Make sure you use the original, best-quality input you have – a clean source always gives a cleaner result.
Step 2: Click the check button
Click the check button. The default settings work for most people, so change them only if you need a specific size, format or style.
Step 3: Wait a few seconds while the page is analysed
Wait a few seconds while the page is analysed. Processing usually takes a few seconds. Keep the browser tab open until the result appears.
Step 4: Read the results
Read the results and fix any problems that are found. Save the result with a descriptive file name so you can find it later, and keep your original as a backup.
When the result is ready you can download or copy it immediately. Try the SSL Checker now and see how quickly it works.
Online SSL Checker vs Other Methods
The table below compares doing the job by hand, with desktop software and with a free online tool.
| Criteria | Manual method | Desktop software | SSL Checker |
|---|---|---|---|
| Cost | Your time | Often paid | Free |
| Installation | None | Required | None |
| Works on mobile | Difficult | Limited | Yes |
| Learning curve | High | Medium | Low |
| Speed | Slow | Medium | Seconds |
Key Features to Look For
- Technical SEO check: Find issues that can hurt rankings and user experience.
- Quick report: Results are ready in seconds.
- Free: Use the SSL Checker as often as needed.
- No login: Start checking immediately.
- Any website: Works with WordPress, Blogger, custom and e-commerce sites.
- Device friendly: Run checks from desktop or mobile.
Common Problems and How to Fix Them
Website cannot be reached
Check that the site is online and not blocking automated checks.
Score did not improve after a fix
Clear server and CDN caches, then run the check again.
Different results for www and non-www
Redirect one version to the other with a 301 redirect.
Mistakes to Avoid
- Checking only the homepage instead of important inner pages.
- Ignoring the www vs non-www and http vs https versions.
- Fixing warnings before critical errors.
- Not re-testing after making a fix.
Tips for Best Results
- Check both the www and non-www versions of your site.
- Fix critical errors first, then warnings.
- Re-test after each change to confirm the fix.
- Run regular checks as part of your monthly SEO routine.
Related Tasks You Can Do
Htaccess Redirect Generator
The .htaccess file on Apache and LiteSpeed servers (including Hostinger) controls redirects. One preferred URL version avoids duplicate content. It is useful for forcing https, choosing www or non-www, fixing duplicate content. Try Htaccess Redirect Generator.
HTTP Header Checker
HTTP headers reveal how a server responds: status codes, caching, compression and security policies. They are essential for technical SEO. It is useful for checking redirects, verifying caching, security header audits. Try HTTP Header Checker.
Check GZIP Compression
Compression shrinks HTML, CSS and JS before sending them to visitors. Enabling it can reduce transfer size dramatically and improve page speed. It is useful for speed optimisation, server configuration checks, seo audits. Try Check GZIP Compression.
Worked Example
Example: an old blog post links to a page that was deleted. A broken link checker finds the 404; you either update the link to a relevant live page or add a 301 redirect, so visitors and crawlers no longer hit a dead end.
Quick Reference Table
| Check | Healthy result | Why it matters |
|---|---|---|
| SSL | Valid, not expired | Trust and HTTPS ranking signal |
| Compression | GZIP or Brotli on | Faster pages |
| Links | No 404 errors | Better user experience |
| Crawlability | Text readable by bots | Content can be indexed |
Glossary of Key Terms
- SSL/TLS certificate
- Enables HTTPS and encrypts data between visitors and your site.
- 404 error
- A page or link that cannot be found.
- GZIP / Brotli
- Compression methods that shrink files sent by the server.
- Crawler (spider)
- A bot that reads pages for a search engine.
- Index
- The database of pages a search engine can show in results.
Best Practices
Check SSL expiry dates, run a broken-link scan monthly, keep important text as real HTML (not inside images) and make sure compression is enabled on your server.
Key Takeaways
- To check an ssl certificate and fix 'not secure', open the free SSL Checker on pdfseotools.com, enter the website URL in the box, then run the tool and download or copy the result.
- Check both the www and non-www versions of your site.
- Fix critical errors first, then warnings.
- Use the free SSL Checker to get the job done in seconds.
Related Free Tools
- Htaccess Redirect Generator – Generate .
- HTTP Header Checker – Check the HTTP response headers of any URL – status code, cache, security and redirect headers.
- Check GZIP Compression – Check whether GZIP or Brotli compression is enabled on your website.
Explore all Free Website Checkers on pdfseotools.com.
Frequently Asked Questions
Is HTTPS a ranking factor?
Yes, it is a lightweight ranking signal.
How do I get free SSL?
Hostinger and many hosts offer free SSL certificates.
Is it free?
Yes, completely free.
Is it free to use?
Yes. All tools mentioned in this guide are free on pdfseotools.com, with no sign-up and no installation.
Does it work on mobile?
Yes. The tools work in Chrome, Safari, Firefox and Edge on Android, iPhone, Windows and Mac.
Conclusion
How to Check an SSL Certificate and Fix 'Not Secure' is quick and easy with the right tool. Bookmark the SSL Checker and explore more website checkers to finish your work faster – free, secure and on any device.