Best SEO & Website Testing Tools for Builders
Here are useful tools for checking websites before and after launch.
Use these for SEO, speed, indexing, technical checks, user behaviour, structured data, and site quality.
Add more tools in the replies.
1. Google Search Console
Link: https://search.google.com/search-console/
Best for:
- Submitting sitemaps
- Checking indexing
- Inspecting URLs
- Seeing search clicks
- Finding crawl issues
- Checking search performance
- Monitoring Google visibility
Why it is useful:
Google Search Console shows how Google sees your site. It is one of the first tools to set up after launching a website, forum, blog, shop, or web app.
Good for:
- New websites
- Forums
- Blogs
- Landing pages
- SEO monitoring
- Sitemap checks
Free or paid:
Free.
Warning:
Data can take time to appear, especially on new sites.
2. PageSpeed Insights
Link: https://pagespeed.web.dev/
Best for:
- Website speed checks
- Mobile performance
- Desktop performance
- Core Web Vitals checks
- Finding slow images
- Finding render-blocking scripts
- Checking launch readiness
Why it is useful:
PageSpeed Insights helps show what is making a page slow and gives performance suggestions for both mobile and desktop.
Good for:
- Landing pages
- Forums
- Blogs
- Shops
- Web apps
- Client websites
Free or paid:
Free.
Warning:
Do not chase perfect scores blindly. Fix the problems that actually affect users first.
3. Ahrefs Webmaster Tools
Link: https://ahrefs.com/webmaster-tools
Best for:
- SEO audits
- Technical SEO checks
- Backlink checks
- Organic keyword checks
- Finding SEO issues
- Monitoring website health
Why it is useful:
Ahrefs Webmaster Tools gives useful SEO data for sites you own. Good for checking technical SEO problems and seeing which pages and keywords bring traffic.
Good for:
- Website owners
- Bloggers
- Forum owners
- SEO beginners
- Indie founders
- Builders launching public sites
Free or paid:
Free for verified websites. Paid Ahrefs plans exist for advanced SEO work.
Warning:
SEO tools show signals and suggestions. You still need judgement before changing pages.
4. Screaming Frog SEO Spider
Link: https://www.screamingfrog.co.uk/seo-spider/
Best for:
- Crawling websites
- Finding broken links
- Checking page titles
- Checking meta descriptions
- Finding redirect problems
- Finding duplicate content
- Technical SEO audits
Why it is useful:
Screaming Frog is powerful for technical site checks. It crawls your website like a search engine and shows problems at scale.
Good for:
- Bigger websites
- SEO audits
- Client sites
- Forums
- Blogs
- Shops
- Migration checks
Free or paid:
Free crawl limit available. Paid licence unlocks more.
Warning:
Can feel technical at first. Start with small crawls.
5. Microsoft Clarity
Link: https://clarity.microsoft.com/
Best for:
- Heatmaps
- Session recordings
- User behaviour
- Click tracking
- Scroll tracking
- Finding confusing layouts
- Seeing where users get stuck
Why it is useful:
Microsoft Clarity helps you see how visitors actually use your website. Useful when a page looks good, but users are not clicking, scrolling, signing up, or converting.
Good for:
- Landing pages
- SaaS pages
- Forums
- Shops
- Signup flows
- Product pages
Free or paid:
Free.
Warning:
Use privacy-friendly settings and check your privacy policy before using analytics tools.
6. GTmetrix
Link: https://gtmetrix.com/
Best for:
- Website performance testing
- Speed monitoring
- Lighthouse-style reports
- Waterfall charts
- Tracking speed over time
- Finding heavy files
Why it is useful:
GTmetrix gives detailed speed reports and can help find slow images, scripts, fonts, and third-party files.
Good for:
- Web developers
- Site owners
- Launch checks
- Performance fixes
- Client reports
Free or paid:
Free version available. Paid plans exist.
Warning:
Test from a location close to your real users where possible.
7. W3C Markup Validator
Link: https://validator.w3.org/
Best for:
- HTML validation
- Markup errors
- Broken structure
- Standards checks
- Debugging strange layout issues
Why it is useful:
The W3C Markup Validator checks whether your HTML markup is valid. This can help find hidden page structure problems.
Good for:
- Developers
- Static sites
- Landing pages
- Templates
- Theme builders
- Debugging HTML
Free or paid:
Free.
Warning:
Not every warning is urgent. Focus on real errors first.
8. Google Rich Results Test
Link: https://search.google.com/test/rich-results
Best for:
- Structured data testing
- Schema checks
- Rich result previews
- SEO enhancements
- Product/article/page markup
Why it is useful:
The Rich Results Test checks if Google can generate rich results from structured data on your page.
Good for:
- Blogs
- Product pages
- Review pages
- Recipe pages
- Article pages
- FAQ-style pages
- SEO-focused websites
Free or paid:
Free.
Warning:
Structured data does not guarantee rich results. It only helps make the page eligible.
9. Bing Webmaster Tools
Link: https://www.bing.com/webmasters/
Best for:
- Bing indexing
- Sitemap submission
- SEO reports
- URL inspection
- Crawl checks
- Search visibility outside Google
Why it is useful:
Bing Webmaster Tools is worth setting up after Google Search Console. It helps your site get discovered by Bing and other search experiences connected to Bing data.
Good for:
- New sites
- Blogs
- Forums
- Business websites
- SEO monitoring
- Sitemap submission
Free or paid:
Free.
Warning:
Do not ignore Bing. It can still bring useful traffic.
10. Broken Link Checker
Link: https://www.brokenlinkcheck.com/
Best for:
- Finding dead links
- Checking external links
- Cleaning old pages
- Fixing resource lists
- Site quality checks
Why it is useful:
Broken links make a site feel abandoned. A broken link checker helps find links that need updating or removing.
Good for:
- Resource pages
- Forums
- Blogs
- Directories
- Old websites
- Documentation pages
Free or paid:
Free version available.
Warning:
For large sites, stronger crawling tools may be better.
Quick recommendations
First tools to set up after launching a website
Google Search Console
Bing Webmaster Tools
PageSpeed Insights
Best for technical SEO
Screaming Frog SEO Spider
Ahrefs Webmaster Tools
Best for speed testing
PageSpeed Insights
GTmetrix
Best for user behaviour
Microsoft Clarity
Best for checking HTML
W3C Markup Validator
Best for structured data
Google Rich Results Test
Add your own SEO or testing tools
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