I Tested 7 Free Website Audit Tools. Three Wanted an Account First

Three of the seven best-known free website audit tools would not show us a single number until we created an account. Not a limited number. Not a blurred number. Zero.

The test was the same for all seven: open the free page, decline the cookie banner, type rtings.com, press the button, wait. No account was created. No CAPTCHA was answered. No paid seat was used. Whatever the free tier handed back on the first attempt is what got screenshotted, and what you are about to read.

The surprise was not which tool won. It was how many of them are not really free website audit tools at all — they are free lead forms with an audit-shaped promise attached. One of them, after running a visible analysis with a progress bar, stopped at the last second and asked for an email. Another returned exactly one sentence: the data is not publicly available.

One disclosure before anything else, because it changes how you should read the rest: UNmiss makes one of the tools below, and we ranked it first. That is a conflict of interest, and the only honest way to handle it is to show you every screenshot, name every number, and tell you plainly where our own tool is weaker than the ones underneath it. There is a whole section further down called "Our own inconvenient number." Read that one before you decide whether to trust the rest.

That middle number is the one worth sitting with. Half the market for "free website audit" is occupied by tools whose free tier is an email capture. They rank for the phrase, they take the click, and then they ask you to sign up before you learn anything about your own site. That is a legitimate business model. It is just not what the phrase "free website audit tool" means to the person typing it.

What a website audit actually checks

A website audit is a machine reading your page the way a search engine reads it, then telling you where the two of you disagree. Strip away the branding and every tool in this comparison is doing some subset of five jobs.

Can it be found? Does the page answer with HTTP 200, is indexing allowed, is there a canonical URL, does robots.txt exist, is there a sitemap, does only one version of the domain resolve. These are the checks where a single wrong character costs you every ranking you have.

Can it be understood? Title, meta description, one H1, image alt text, enough words on the page to establish a topic, structured data that names what the page is. This is the layer that decides how your result looks in the search listing, and increasingly whether an AI assistant can quote you at all.

Is it fast enough? Time to first byte, load time, page weight, oversized CSS and JavaScript, and Google's own Lighthouse scores. Speed is the one area where free tools differ enormously, because running Lighthouse properly costs the vendor real compute.

Does it work on a phone? The viewport meta tag, tap target spacing, and mobile-specific Core Web Vitals. Most traffic is mobile; a surprising number of free auditors still report only desktop.

Is anyone linking to it? Domain-level authority, backlink counts, referring domains. This is not strictly an audit — it is a different dataset entirely — but it is the context that tells you whether your technical problems are the reason you are not ranking, or whether the real answer is that nobody links to you.

Why "free" means six different things

Every tool here calls itself free. In practice we found six distinct meanings, and the difference between them is the whole story of this comparison.

Free with a daily allowance and no account. You type a domain, you get a report, and a counter goes down. This is the only version of "free" that behaves the way readers expect. Three tools did this.

Free with an allowance of exactly one. You get a single check, ever, tied to your IP address. Useful once, useless as a working tool. Two tools did this.

Free after an account. The tool is genuinely free, but the price is your email address and whatever marketing follows it. Three tools did this, and two of them presented the wall only after we had typed our domain and pressed the button.

Free as a teaser. Some numbers are shown, the useful ones are blurred or locked. None of the seven did this outright, though several came close by making the free report a preamble to a paid crawl.

Free as a trial. Fourteen days, then a card. Seobility's banner offered exactly this, though its checker itself works without one.

Free, but not to software. One tool, SEOptimer, sits behind a bot-protection interstitial that never cleared for us — not in headless Chromium, not in a real Chrome window with a persistent profile. A human visitor almost certainly does not hit that wall, so reporting it as "blocked" would have described our tooling rather than their product. We dropped it from the comparison rather than publish a verdict we could not earn. WooRank took its place.

How I tested

One subject, seven tools, one afternoon: rtings.com, the product review site. It is a third party we have no relationship with, it is large enough that every tool finds something to say, and choosing someone else's site avoids the obvious trap of picking a page our own tool happens to score well on.

The 7 tools at a glance

Prices are deliberately absent from that table. Every one of these companies sells a serious paid product, several of them excellent, and a column of monthly figures would invite you to compare a $50 subscription against a $200 one as though that were the question. It is not. The question this article answers is narrower and more useful: if you pay nothing and sign nothing, what do you actually get?

The tools, ranked

1. UNmiss Website Audit — the most complete report you can get without an account

The UNmiss Website Audit is our own tool, so treat the prose with suspicion and read the screenshots instead. Two fields, one button, no account, and about 70 seconds later a full report.

The headline is 95 out of 100 site health, scored by SE Ranking's audit engine and shown unadjusted — the number the crawler returned, not a number we reweighted to look friendlier. Underneath it: 0 critical issues, 0 warnings, 4 notices, 118 checks passed, broken into four groups — on-page 25/25, technical 65/67, speed 27/29, mobile 2/2.

The four notices are named in plain words rather than error codes: no social preview card tags, nofollow internal links, a CSS file is very large, CSS not compressed. Each one expands into what it costs you and what to change.

What separates this report from the others is that passes are shown as explicitly as failures, with the measured value attached. The title is not "good" — it is 32 characters. The meta description is 89 characters. There is one H1 and it is 34 characters. All 34 images have alt text. There are 593 words on the page. When a check fails it says so just as plainly: tap targets sit too close together on phones, which is a real defect on a real site, printed without softening.

Two things in that second screenshot are worth more than the score. The first is the authority block: Domain Trust 86/100, 28.9K pages Google knows about, 722.6K backlinks, 35.6K linking domains. No other free tool in this comparison put link data next to technical data, and that pairing is what tells you whether your problem is the page or the profile.

The second is a single grey line of text: "1 link-related checks were skipped because this free check crawls a single page." That is the tool admitting, unprompted, that it withheld a result and why. A one-page crawl cannot honestly evaluate internal-link checks like "orphan page" or "low inlinks" — every page looks orphaned when you only fetch one. Most tools quietly report those as failures, which inflates the issue count on a site that has no such problem. Ours drops them and tells you it did.

The same restraint governs the whole check list: a row is omitted rather than guessed at when the data cannot support a verdict. If a page has no images, there is no image-alt row. If there are no hreflang tags, there is no hreflang row. A blank verdict is worse than no verdict.

Free outputs are genuinely free: Share this report, Copy summary, Export CSV, Print / save as PDF. No tool in this comparison offers CSV without an account. The daily allowance is 3 checks, enforced on the server, with no signup and no card.

2. Seobility SEO Checker — the best on-page detail, and it asks for nothing

Seobility was the surprise of the test. It runs without an account, it produced a complete report in one attempt, and on pure on-page depth it is the most thorough free tool here.

The headline is 86 % on-page score with an Issues: 2 warning badge, split into sub-scores: meta data 100 %, page structure 100 %, page quality 76 %. The two warnings are specific and, unusually, semantic rather than mechanical: "Some words from the page title are not used within the pages content" and "Words from the H1 heading are not used in the page content." No other tool in this test noticed that.

The depth below is real. Seobility counts 533 words, works out that 19.5 % of the text are stop words, counts 5 paragraphs, measures average sentence length at 14.13 words, notes that the page loads 2 JavaScript files, and recommends up to 11 strong or bold tags for a page of that length. Section rollups run all the way down to frames (1/1), mobile optimisation (3/3) and image SEO (1/1).

Here is a detail worth more than either score. Seobility counted 533 words on the same page where our audit counted 593. Neither is lying. They disagree about what counts as body text — navigation, captions, boilerplate. If two careful tools can differ by 11 % on something as simple as counting words, treat any single number from any single auditor as an estimate with a method behind it, not a fact.

Its quota line reads "You have 1 of 3 checks left today", while the pricing block on the same page advertises the free Basic plan at 5 checks per day. So an anonymous visitor gets 3; the extra two are what the signup buys. Paid tiers were listed at $50.00 a month for 50 daily checks and $200.00 a month for 200.

What it does not do: no Lighthouse or PageSpeed scores, no Core Web Vitals, no domain authority or backlink context. It is an on-page checker, and an excellent one, rather than a whole-site audit.

Try Seobility's free SEO Checker →

3. Sitechecker — one good report a day, after a detour

Sitechecker produced a genuine report, and a good one. It just makes you walk through a funnel first.

Typing a domain and pressing their crawl button does not start an audit. It opens a chooser: "Website crawling — free account needed — crawl for 300+ issues" against "One-page crawling — instant report — crawl for 100 issues." Pick the second and you get a real report with no account.

That report gives 69 of 100 for the page, 1 critical and 5 warnings, plus a clean status panel: 200 OK, indexable, 2.58 MB page size. The single critical is specific and useful — Mobile PageSpeed Insights: 38 — and the report navigation breaks findings into content optimisation, structured data, images, search optimisation, links and PageSpeed Insights. Export PDF and Copy issues work free.

The catch is stated in their own words at the top of the report: "You've reached your daily limit of 1 checks. Please wait 24 hours for your limit to renew or create free account to get unlimited checks." One check a day. Fine for a spot check on your own homepage, unworkable for comparing three pages or checking a fix.

Try Sitechecker's one-page audit →

4. Semrush free SEO Checker — exactly one check, and ours came back empty

Semrush's free audit is easy to miss because the obvious URL is wrong: /site-audit/ returns a 404. The free, no-account surface lives at semrush.com/siteaudit/, branded "SEO Checker, powered by Semrush Site Audit."

Beside the button sits a small counter. It read 1/1 before our run and 0/1 afterwards, which makes the free allowance unambiguous: one check. Not one a day — one.

We spent it on rtings.com, and here is exactly what happened, because it matters more than a verdict. An "AI Visibility Toolkit" promo modal opened over the form. We repeated the run with the modal explicitly dismissed and cookies denied. After three minutes the page had still not rendered a readable report — what appeared was the modal over the hero and a row of report-section pills. Once the counter hit 0/1, pressing Analyze Website again did nothing at all: no report, no error, no message. Retrying from a different IP address produced the same 0/1.

So the honest position is narrow. We are not telling you Semrush's free report is bad; we never saw it. We are telling you the free allowance is a single check, that our single check produced nothing readable inside three minutes, and that when the allowance is gone the button fails silently rather than explaining itself. For a tool this widely recommended as "the free website audit", that is the finding.

Try Semrush's free SEO Checker →

5. Ahrefs Website Checker — the signup wall arrives after you type

Ahrefs makes the best-known site auditor in the industry, and its free Website Checker page is clean and inviting: one field reading "Enter domain".

Submit a domain and the page redirects to ahrefs.com/signup. The screen reads "Welcome to Ahrefs — Get website analytics, technical audits, and SEO metrics for your website with an Ahrefs Free account", offering Continue with Google or Continue with Email. Beside it, an illustration of the report you cannot see yet, with a score dial reading 60.

No number was shown before the account demand. We created no account, so this article makes no claim whatsoever about the quality of Ahrefs Webmaster Tools, which by every account is a serious product. The claim is only this: as a free website audit tool you can use right now without registering, it does not function as one. The signup arrives after you have typed your domain, not before.

6. Ubersuggest — it starts analysing, then stops for your email

Ubersuggest was the most frustrating of the three walls, because it very nearly works.

Enter the domain and it moves into the app and starts working in full view: Generating business summary… Analyzing Business… Generating Summary… Finding Topics. Then it halts on "Create a FREE account and get: More keyword suggestions · Weekly rank tracking · Personalized SEO suggestions" with a Create Free Account button.

Showing the work and then withholding the result is a deliberate conversion pattern, and it is effective precisely because you have already invested attention. No audit numbers were reached. As with Ahrefs, we make no claim about what sits behind the wall.

7. WooRank — one sentence, and that sentence is a sales pitch

WooRank was the shortest test of the day.

Enter a domain, press Check my website's score, land on a teaser-review page, and read the whole output: "The data for this URL is not publicly available. But you can easily access it with a WooRank account." No score, no checks, no partial result. A button labelled "Check my website's score" that returns no score is the clearest example in this test of the gap between how these tools are marketed and what they do.

The audit is the front door. Behind it are 39 more free tools

Here is the argument that no other tool in this comparison can answer, and the reason we built the audit the way we did.

Every free auditor tells you what is broken and then sells you the fix. The report ends, the upsell begins, and the actual work — rewriting the title, generating the schema, building the sitemap, finding the keyword you should have targeted — is either your problem or a subscription. The audit is the top of a funnel, and the funnel goes to a pricing page.

Ours goes somewhere else. Every finding in the UNmiss report has a free UNmiss tool sitting behind it that does the fixing. That is not a bundle in the marketing sense; it is a mapping, finding by finding.

Every finding, and the free tool that fixes it

Beyond those, the same account-free catalogue includes nine title generators — blog post, YouTube, podcast, course, newsletter subject line, affiliate product, comparison article, listicle and tutorial — plus five YouTube tools covering thumbnail CTR, opening hooks, script outlines, metadata and localisation. Thirty-nine tools in total, none of them requiring an account.

A further fifteen — toxic backlinks, domain overview, organic traffic, internal links, Google Business Profile audit, citation tracker, competitor analysis, backlink gap, market explorer, SERP analyzer, on-page checker, site speed, AI visibility, topical map and content brief — run in the signed-in workspace. We are deliberately quoting no free limits for those, because their quotas live in a different system from the one we can verify line by line. Every number in this article is one we could check in code or read off a screenshot, and we are not going to break that rule to pad a list.

Our own inconvenient number

Here is the thing our tool does worse than the paid products these companies are steering you toward, stated as plainly as we can manage.

It audits one page. One. The homepage, or whichever URL you hand it. Sitechecker's own chooser offers a website crawl of up to 100,000 URLs behind a free account. Semrush Site Audit and Ahrefs Site Audit crawl entire properties on their paid tiers and track the results over time. Our free check fetches a single page, runs the full battery against it, and stops.

That limitation is why the report carries a line admitting which checks were suppressed. Internal-link checks like "orphan page" and "low inlinks" are meaningless on a one-page crawl — every page is an orphan when you only fetch one — so we drop them rather than report a fake failure, and we say so on screen. It is also why the footer of the report reads, in our own words, "This checked 1 page. Your site has more."

Be clear-eyed about what a one-page audit can and cannot tell you. It will find the missing schema, the oversized CSS, the tap targets, the title length, the mobile speed score. It will not find the 400 orphaned product pages, the duplicate templates, the pagination that loops, or the subfolder nobody has linked to since 2021. Those are crawl problems, and a crawl is what finds them.

So the honest framing of this whole comparison is: among tools that give you a real report for free, right now, without an account, ours returns the most. That is a narrower claim than "best website audit tool", and it is the only one the evidence supports.

Which one should you pick

If you want the most complete free report and you want it now, use the UNmiss Website Audit. Three a day, no account, technical checks plus both PageSpeed scores plus link authority in one page, and every export free.

If you want a second opinion on on-page detail, run Seobility as well. It costs nothing, it also allows three a day, and it catches semantic mismatches between your title, your H1 and your body copy that nothing else here noticed. Running both and comparing is genuinely better than running either alone — the 533-versus-593 word count is a good reminder of why.

If you specifically want severity triage — a short list of "criticals" to hand a developer — Sitechecker's one-page report is nicely structured. Just remember you get one a day.

If you already pay for Semrush or Ahrefs, ignore this entire article and use their paid site audits. They crawl whole sites, they schedule, they track progress over time, and nothing free competes with that. This comparison is about the free doorway, not the paid building.

What no free audit can tell you

Three things, and it is worth knowing them before you over-trust any score on this page.

Whether the score matters. A 95 and a 69 on the same page, from two competent tools, are not a contradiction — they are two different weightings of two different check lists. Scores are useful for tracking your own direction over time. They are close to meaningless as a comparison between sites, and completely meaningless as a comparison between tools.

Why you are not ranking. An audit measures the page. It cannot measure intent, competition or authority. A technically perfect page targeting a keyword owned by three sites with 50,000 referring domains will not rank, and no auditor will tell you that. Keyword Research and Rank Tracker answer that question; an audit does not.

Whether AI assistants know you exist. This is the newest gap and the one most free auditors have not addressed at all. Every tool in this comparison checks how a crawler reads your page. None of them, ours included, checks whether ChatGPT, Claude, Gemini or Perplexity actually name your brand when someone asks a buying question — that is a separate job for the AI Visibility Checker. Technical health increasingly decides whether an AI system can quote you. It does not decide whether it does.

Frequently asked questions

The verdict

Seven tools, one domain, one afternoon. Three of them produced a report. Three of them produced a signup form. One produced a counter reading 0/1 and then, when pressed again, nothing whatsoever.

The UNmiss Website Audit ranks first here for a specific and limited reason: among the free tools that give you an actual report without asking who you are, it returns the most — 28 named checks, both PageSpeed scores, domain authority, free exports, three times a day. It also audits exactly one page, which the paid crawlers do not, and we would rather say that ourselves than have you find it out afterwards. Run Seobility alongside it and you have two independent readings of the same page for nothing, which is a better position than any single tool can put you in.

The broader finding is the one worth carrying away. "Free website audit tool" has quietly come to mean "free after you tell us who you are" for a large part of the market. That is worth knowing before you type your domain into the next one.

Tested on 14 August 2026. All seven tools were run against rtings.com on the same afternoon, from the same browser, with cookie banners declined, no accounts created and no CAPTCHAs answered. Every figure quoted above is read off a screenshot published in this article or off the tool's own on-screen text. SEOptimer was in the original shortlist and was dropped because its bot protection would not clear for automated testing, which would have produced a verdict about our tooling rather than their product.