What does a technical SEO checker test?

A technical SEO checker tests the signals search engines use before they can rank a page: whether the page can be crawled, whether it is allowed to be indexed, whether it has a canonical tag, how its headings are structured, whether it uses valid schema.org markup, and whether its links work. Stackra checks all of these and explains each result in plain English with the business impact.

What schema markup should a small business add?

For most small businesses, Organization, WebSite, and Service or LocalBusiness schema cover the essentials. They tell search engines and AI assistants who you are, what you offer, and where you operate. Avoid SoftwareApplication schema, which triggers a Google install or login rich result that ordinary visitors cannot complete and that causes confusion.

What is a canonical tag and do I need one?

A canonical tag tells search engines which version of a page is the original when similar content exists at more than one URL. Most pages should have a self-referencing canonical tag pointing to themselves. This prevents duplicate content from splitting your ranking signals across several URLs.

Why is crawlability and indexability important?

If search engines cannot crawl a page because robots.txt blocks it, or cannot index it because of a noindex directive, the page will never appear in search results no matter how good the content is. Crawlability and indexability are the foundation that every other SEO effort depends on, which is why this checker tests them first.

Technical SEO Checker

Q: Are multiple H1 headings bad for SEO?

No. Modern search engines handle more than one H1 heading on a page without any problem. Stackra only flags a page when it has zero H1, because that leaves the main topic of the page unstated. If a page has one or several H1 headings, it passes this check.

See what search engines see. Check crawlability, indexing, metadata, schema, headings, and links in one focused pass, in plain English.

This is one slice of the full scan

See your complete website report

This checker covers one part of your site. A full Stackra scan grades the whole thing and shows you the screenshots, expert reviews, and action plan a single check cannot.

Your Growth Readiness Score
One 0 to 100 score across conversion, search, and technical health, with the weak spots ranked.
Expert AI reviews and visuals
A CMO, SEO expert, and CTO read your site, with screenshots and evidence this quick check leaves out.
A prioritized action plan
The fixes that move the needle first, in plain language, tagged by impact and effort.

Free to sign up. Results in about 5 minutes.

A Stackra Growth Readiness Score report with conversion, search, and technical pillar scores, expert review summaries, and a prioritized action plan

How the Technical SEO Checker works

Enter your URL and Stackra reuses a recent scan of your site, or runs a fresh one, then reads the technical signals search engines care about: whether the page can be crawled and indexed, your canonical and social tags, your heading structure, your schema markup, and your link health.

Is more than one H1 a problem?

No. Modern search engines handle multiple H1 headings without issue. This checker only flags a page when it has zero H1, because that leaves your main topic unstated.

What schema should I add?

For most small businesses, Organization, WebSite, and Service or LocalBusiness schema cover the essentials. They tell search engines and AI assistants who you are and what you offer.

Does this check performance?

Yes. Because page speed is a Google ranking signal, this checker includes a quick page-speed read (load speed, layout stability, and responsiveness). For a deeper look with mobile and desktop side by side, use the Core Web Vitals Checker. The full Stackra scan combines everything.