Website QA used to mean one question: does it work? Do the buttons click, do the forms submit, does it render in Safari. That's still true, but in 2026 the definition has widened. "Quality" now also covers the typo in your hero headline, the © 2021 still sitting in your footer, the broken image on your pricing page, the missing meta description quietly dragging down your rankings, and the lorem ipsum a developer forgot to delete before launch. None of those crash anything. They just quietly tell visitors the page wasn't finished.
The tools below all do the same core job in different ways: crawl your site automatically and surface the problems your team stopped seeing months ago, from broken links and dead images to typos, SEO gaps, accessibility barriers, and slow pages. Here are the eight worth knowing this year, and who each one is for.
1. Steterly, best all-in-one site quality scanner
Steterly reads your whole site the way an editor reads a galley proof. In a single pass it flags typos and grammar (an AI proofreader across six languages that won't trip over your brand names), broken links followed through redirect chains, dead images, missing alt tags, duplicate or missing H1s, outdated copyright years checked on every page, leftover placeholder text, missing meta titles and descriptions, Core Web Vitals, and automated WCAG 2.1 AA accessibility checks.
What sets it apart is breadth without setup. Most tools in this list do one or two of those things well; Steterly bundles content quality, SEO hygiene, performance, and accessibility into one report. There's nothing to install, because it renders your frontend in a headless browser like a real visitor, which makes it platform-agnostic across WordPress, Shopify, Webflow, Squarespace, Wix, Framer, React/Next.js, Vue, and static HTML, with zero impact on page speed. A per-site custom dictionary kills repeat false positives, ignore rules silence patterns you don't care about, and reports export to CSV or PDF, white-labeled on the Agency plan.
- Pricing: free scan up to 50 pages, no credit card. Personal $9/mo, Studio $59/mo, Agency $179/mo.
- Best for: agencies, freelancers, and content-heavy sites that want typos, broken links, stale copyrights, SEO gaps, and accessibility issues caught in one pass before launch.
You can start with a free scan and get a clear list of what's still sitting on your live pages.
2. Screaming Frog SEO Spider, best for deep technical SEO
The veteran desktop crawler. Screaming Frog excels at raw crawling power and granular configuration, surfacing broken links, duplicate content, metadata errors, redirect chains, and orphan pages, with deep integrations into Google Analytics, Search Console, and Ahrefs. It returns raw data that rewards people who already know what they're looking for.
- Pricing: free up to 500 URLs; around £199/year for unlimited.
- Best for: technical SEOs and developers who want maximum control over a deep audit.
3. Sitebulb, best for visual, client-friendly audits
Sitebulb crawls the same kinds of issues as Screaming Frog but turns the data into prioritized, visually rich reports with sensible defaults and clear recommendations. Many SEO professionals run both: Screaming Frog for raw extraction, Sitebulb for audits they can hand to a client without translation.
- Pricing: Lite from around $165/year; cloud tiers for teams.
- Best for: teams and agencies that want readable, prioritized audit reports.
4. Ahrefs Site Audit, best for ongoing monitoring inside an SEO suite
If you already live in Ahrefs for backlinks and keywords, its Site Audit adds automated weekly crawls that flag new issues, assign health scores, and track fix progress over time, with broken links sitting alongside backlink and ranking context. It's overkill if you only need quality checks, and ideal if site health is part of a broader SEO workflow.
- Pricing: from around $129/mo (Lite) upward.
- Best for: teams running site health as part of a full SEO program.
5. Semrush Site Audit, best for marketing teams
Similar story to Ahrefs from the other major suite. Semrush bundles technical site auditing with keyword research, PPC, and competitive analysis, so marketing teams can spot crawl errors, slow pages, and meta issues without leaving their reporting hub.
- Pricing: from around $139.95/mo (Pro) upward.
- Best for: marketing teams that want auditing alongside their wider toolkit.
6. SE Ranking, best value all-in-one for small teams
SE Ranking offers a clean website health dashboard that sorts issues into errors, warnings, and notices, detects 3xx and 4xx URLs, orphan pages, and redirect loops, and sends automated daily or weekly reports, which is handy for agencies keeping clients updated. Its entry plans cover large crawls at a lower price than the two big suites.
- Pricing: affordable entry tiers covering tens of thousands of pages per audit.
- Best for: small agencies wanting solid auditing plus light SEO features on a budget.
7. Dead Link Checker, best free broken-link tool
When you only need one thing, broken links, Dead Link Checker does it free. It scans single or multiple sites, reports 404s and dead URLs, and tells you where each one lives. No content or SEO analysis, but a fast, no-cost option for a focused check.
- Pricing: free, with a paid multi-site option.
- Best for: quick, no-cost broken-link sweeps.
8. Axe by Deque, best dedicated accessibility checker
Accessibility is no longer optional, and Axe by Deque is the de facto standard for catching WCAG violations, like missing alt text, unlabeled forms, broken ARIA roles, and empty buttons. It plugs into dev tools and CI so issues get caught before they reach users. Steterly bundles WCAG 2.1 AA checks too; Axe is the choice when accessibility is your sole, deep focus.
- Pricing: free core tooling; paid enterprise tiers.
- Best for: teams treating accessibility as a first-class, dedicated workflow.
How to choose the right tool
There's no single best tool, only the best fit for the gap you actually have.
- Want everything in one scan? Start with Steterly, especially if you manage client sites or content-heavy pages and want typos, broken links, dead images, SEO gaps, slow pages, and accessibility issues caught in a single pass with nothing to install.
- Need deep technical SEO control? Reach for Screaming Frog or Sitebulb.
- Want auditing inside a broader SEO suite? Ahrefs or Semrush.
- On a budget but want all-in-one coverage? SE Ranking.
- Have one specific job? Dead Link Checker for links, Axe for accessibility.
Frequently asked questions
What is a website QA tool?
A website QA tool checks your live site for problems that hurt the visitor experience or your search rankings, such as broken links, dead images, typos, leftover placeholder text, missing meta tags, slow pages, and accessibility barriers. The tools in this list automate that check by crawling your pages so you don't have to review each one by hand.
What's the difference between a QA scanner and a testing framework like Selenium?
Frameworks like Selenium, Playwright, and Cypress are built for functional testing: developers write scripts to confirm features behave correctly. Site quality scanners like Steterly, Screaming Frog, and Ahrefs instead crawl your rendered pages to surface content, SEO, and quality issues automatically, with no scripts to write or maintain. Most teams need both layers, but only the second catches a typo or a stale copyright year.
Which website QA tool is best for agencies?
Agencies usually want broad coverage across many client sites plus client-ready reports. Steterly fits well with its multi-site plans, white-label PDF exports, and a single scan covering content, SEO, performance, and accessibility. Sitebulb and SE Ranking are also strong for client-facing audit reports.
Can I check my website quality for free?
Yes. Several tools offer free tiers: Screaming Frog crawls up to 500 URLs free, Dead Link Checker handles broken links at no cost, and Steterly offers a free scan of up to 50 pages with no credit card, covering placeholder text, broken links, dead images, meta tags, and more.
How often should I run a QA scan?
At minimum before every launch, and after any major content push or site migration, which is where fresh issues tend to creep in. Teams managing active sites benefit from a recurring scan, weekly or monthly, so new broken links and content slips get caught before visitors find them.
Do these tools work with my CMS or site builder?
The crawl-based scanners do, because they read your site the way a visitor's browser does rather than plugging into a specific platform. Steterly, for example, renders each page in a headless browser, so it works across WordPress, Shopify, Webflow, Squarespace, Wix, Framer, React or Vue apps, and plain static HTML with nothing to install.
Ship it clean
There's no single best tool, only the best combination for how you work, and the smartest move is to start with the layer you're currently missing. If your functional tests are solid but nothing is watching your content and on-page quality, that's your biggest blind spot, and the one your visitors will find first.
Steterly is built for exactly that gap. Start with a free scan (no credit card required) and get a clear list of the typos, broken links, dead images, missing tags, and leftover placeholders still on your site, so you can fix them before a visitor does.