Ahrefs Site Audit vs. Our Free SEO Checker: What You Actually Get
Ahrefs Site Audit is a genuinely good tool. It's also $129+ a month, minimum.
You might just want to know whether a specific page is technically sound before you publish it, or why a page isn't ranking. Paying for a full subscription just to find that out is overkill. So we built a free SEO checker that runs the same category of checks Ahrefs Site Audit runs, with no signup and no cost.
This is an honest, specific comparison, not a "we replace Ahrefs" pitch. Some of what Ahrefs does, our free tool now does too. Some of it, it deliberately doesn't, and won't pretend to. Here's exactly where the line sits.
What Ahrefs Site Audit Actually Does
Ahrefs Site Audit crawls your entire site (every page it can reach, up to whatever crawl-credit limit your plan allows). It cross-references what it finds against Ahrefs' own backlink and rank-tracking index. That combination is the actual product. A crawl alone (checking titles, headings, broken links) is commodity work plenty of free tools do. What you're paying for is the crawl plus the index sitting behind it: which pages have backlinks, how your rankings move, how your internal link equity is distributed across thousands of URLs.
That's a genuinely hard problem to solve for free, and we're not going to pretend otherwise.
What Our Free Checker Does
Our free SEO checker runs 40 checks across 7 categories (indexability, foundations, content signals, media, technical, structured data, and links) against whatever URL you paste in. No account, no card, results in seconds.
As of August 2026 it also has a second mode: "Scan whole site." That crawls up to 10 pages of a site in one pass, discovered via your sitemap, or your homepage's own internal links if there's no sitemap. It scores each page individually, plus a site-wide average. It's bounded on purpose: a free, instant tool can't run an unlimited crawl without either costing us real money per request or taking minutes instead of seconds.
Side by Side
| Area | Ahrefs Site Audit (paid) | Our Free Checker |
|---|---|---|
| Access | Paid plan required, from ~$129/mo, crawl-credit limited | Free, no signup, instant |
| Scope | Full-site crawl, unlimited pages (within plan credits) | 1 page instantly, or up to 10 pages per site-wide scan |
| Indexability (HTTPS, noindex, canonical, redirects) | Yes, sitewide | Yes, per page |
| On-page content (titles, meta, headings, word count) | Yes, sitewide | Yes, plus readability score and a content-freshness signal Ahrefs doesn't surface |
| Images (alt text, dimensions, lazy-load, formats) | Partial | Yes, including CLS-relevant sizing and WebP/AVIF detection |
| Structured data | Presence + partial validation | Spot-check against 15 schema.org types' required properties (documented as a spot-check, not full conformance) |
| Internal links | Yes, sitewide, with authority distribution | Yes, per page, plus a sampled broken-link/redirect check |
| Duplicate content, orphan pages, crawl depth | Yes, needs cross-page comparison | No |
| Backlinks, referring domains, ranking keywords | Yes, Ahrefs' actual moat | No |
| Competitor / SERP benchmarking | Yes | No, needs a keyword/rank index |
| Real Core Web Vitals field data | Yes, via CrUX | No, see our CWV explainer instead |
| Historical tracking, scheduled re-checks, alerts | Yes | No, no accounts, keeps the no-signup positioning |
Where They're Genuinely Equivalent
For the actual on-page and technical checklist (the stuff that decides whether a page is crawlable, well-structured, and free of obvious technical debt), there's very little daylight between the two tools. Both check HTTPS, canonical tags, title/meta length, heading structure, image alt text, structured data presence, and internal link health. If you're auditing a page you just published or one you're actively fixing, our free tool gets you the same actionable list Ahrefs would, without opening a billing tab.
Where Ahrefs Still Wins
Three things a free tool genuinely can't replicate without either a rank index or an ongoing crawl infrastructure most businesses don't need to own themselves:
- Backlink and authority data. Ahrefs' link index is the product. There's no free substitute for knowing who links to you, what your domain rating is, or how your internal PageRank-style authority is distributed across thousands of pages.
- Competitor and SERP benchmarking. Comparing your word count, keyword coverage, or content gaps against the top 10 ranking pages needs a keyword/rank index behind it: that's a subscription product, not something a single-URL fetch can do.
- Unlimited, ongoing crawling. Ahrefs will crawl a 10,000-page site on a schedule and alert you when something breaks. Our free tool is bounded to 10 pages per scan, on demand, with no history, by design, so it stays free and instant.
A free tool that claims to replace Ahrefs is lying to you. One that's honest about exactly where the line sits is actually useful.
Which Should You Use?
- Checking a page before or after publishing? Use our free checker. It's instant, and it covers everything on the standard technical/on-page audit checklist.
- Auditing a small site (under ~10 pages) end to end? The site-wide scan mode covers you in one pass, for free.
- Need to know your backlink profile, competitor gaps, or track rankings over time? That's Ahrefs' actual job: pay for it, or bring in a team that already has the subscription and knows how to read the output.
- Managing a larger site with ongoing SEO work? You need both: the free checker for quick spot-checks while you're working, and a proper paid crawler (or an SEO audit from a specialist) for the sitewide, competitive picture.
Frequently Asked Questions
Is your free checker as good as Ahrefs Site Audit?
For single-page on-page and technical checks, yes, it covers the same category of issues. For backlinks, competitor benchmarking, and unlimited sitewide crawling, no. Those need a rank/link index a free tool doesn't have.
How many pages can the free checker scan at once?
Up to 10 pages per scan, discovered via your sitemap (or your homepage's internal links if there's no sitemap) — choose exactly which 10 to scan, or let it auto-pick your top 10. Run it again on a different selection to cover a bigger site over a few passes. It's bounded on purpose to keep the tool free and instant. Ahrefs has no such limit on a paid plan.
Does the free checker show backlinks?
No. Backlink data needs a link index built from crawling the entire web, which is exactly what you're paying Ahrefs (or SEMrush, Moz, etc.) for. Our checker only analyses the page(s) you give it.
Can I use the free checker instead of paying for Ahrefs?
If all you need is on-page/technical checks on a small number of pages, yes. If you need backlink data, competitor gaps, or rank tracking, no. Those are different jobs and a free single-URL tool can't do them without the underlying index.
How often should I run the site-wide scan?
Any time you make structural changes (new pages, template updates, a redesign) or before a launch. It's free and instant, so there's no reason to ration it the way you might a paid crawl-credit budget.
Wrapping Up
Ahrefs Site Audit and our free checker aren't really competing for the same job anymore, and we'd rather tell you that plainly than oversell a free tool. For the on-page and technical checklist (the stuff you can actually fix yourself, page by page), our free checker gets you there instantly, now across up to 10 pages at once. For backlinks, competitive benchmarking, and unlimited sitewide crawling, that's what a paid tool (or a team that already runs one) is for.
Rather have it done for you? Get SEO, web, content, branding and marketing as one team — explore Growth Partner plans from $750/mo.
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