SEO Audit: Free Tools + Fixes

An SEO audit is a structured health check of your website: does Google find every important page, can it understand them, do they load well, and do they earn links. You can run a serious version for free using tools Google publishes itself. This guide explains what a free SEO audit checks, how to read each result, and the exact fix for the issues it surfaces most often.

What an SEO audit actually checks

Strip away the marketing and every audit examines the same four questions. Can search engines crawl and index your pages? Do those pages clearly answer the queries you want to rank for? Is the site technically healthy, meaning fast, mobile-friendly, secure, and free of broken links? And does the site earn enough trust through quality links? Google's own explanation of how Search works breaks the process into crawling, indexing, and serving, and an audit simply checks that your site behaves well at each stage.

If you want the wider strategic picture behind the checklist, our complete guide to SEO sets out how these pieces fit together. This article stays focused on the audit itself.

Free tools that run an SEO audit (there is no 404Pulse scanner)

404Pulse does not operate a proprietary crawler or produce a magic score. You do not need one. A capable free audit stack looks like this:

• Google Search Console. Free for any site you verify. The Search Console overview shows which queries you appear for, how often searchers click, which pages are indexed, and where indexing fails.
• Google PageSpeed Insights. Reports Core Web Vitals and specific speed opportunities for any URL, using both lab and real-user data.
• Screaming Frog SEO Spider (free tier). Crawls up to 500 URLs at no cost and lists broken links, redirect chains, missing titles, duplicate meta descriptions, and orphan pages.
• Bing Webmaster Tools. Adds a free Site Scan and a second search engine's view of your indexing.

Run all four once and you have a real audit. Anything labelled "free instant SEO score" from an unknown vendor is usually a lead-capture form, not a substitute for these sources. For an honest look at that category, read our SEO checker guide.

Step 1: fix indexing before anything else

There is no point optimising a page Google will not index. In Search Console, open the Pages report and read the reasons under "Not indexed". Common causes and their fixes:

• Excluded by noindex tag. Remove the noindex directive from pages you actually want ranked. It is easy to leave one behind after a site launch.
• Blocked by robots.txt. Check that you are not disallowing a directory you meant to keep crawlable.
• Crawled, currently not indexed. Usually a quality signal. The page is thin or duplicative. Improve it or consolidate it with a stronger page.
• Duplicate without user-selected canonical. Add a canonical tag pointing at the version you want to keep.

Step 2: fix broken links and redirect chains

A crawl almost always turns up internal links pointing at pages that now return a 404, plus redirect chains where one URL hops through several others before landing. Broken internal links waste crawl effort and frustrate readers. Fix them by updating the link to the correct live URL, or by adding a single permanent redirect from the old URL to the right destination. Collapse redirect chains so each old URL points directly at the final page in one hop. Our guide to broken links covers the full repair workflow.

Step 3: fix Core Web Vitals

Speed and stability are ranking-relevant and, more importantly, they decide whether visitors stay. The three Core Web Vitals, per web.dev, are Largest Contentful Paint, which should be within 2.5 seconds; Interaction to Next Paint, which should be 200 milliseconds or less; and Cumulative Layout Shift, which should be 0.1 or less, all measured at the 75th percentile of real page loads. PageSpeed Insights tells you which of these you are failing and why.

The most common wins are compressing and correctly sizing images, deferring non-critical JavaScript, reserving space for images and ads so the layout does not jump, and serving a modern image format. Our dedicated Core Web Vitals guide walks through each metric in depth.

Step 4: fix on-page relevance

With the plumbing sound, audit the pages themselves. For each important page confirm it has a unique, descriptive title tag that includes the primary term, a compelling meta description, one clear H1, a logical heading structure, and content that genuinely answers the query rather than skimming it. The Screaming Frog crawl flags missing or duplicate titles and descriptions directly. Rewrite thin pages so they earn their place, and merge near-duplicates that compete with each other for the same query. A detailed page-level review lives in our website SEO checker guide.

Step 5: review links and authority

Finally, look outward. Use the Search Console Links report to see who links to you and which pages attract them, then plan to earn more links to the pages that matter most to your business. Links are a trust signal, and no amount of on-page tuning fully substitutes for other reputable sites vouching for you.

A simple free-audit checklist you can run today

If you want a repeatable routine rather than a one-off, work through this list in order. Each item maps to a free tool and a clear pass or fail:

1. Indexing. Search Console Pages report shows your key URLs as indexed, with no accidental noindex or robots.txt blocks.
2. Crawl errors. A Screaming Frog crawl returns no unexpected 404s or long redirect chains on internal links.
3. Titles and descriptions. Every important page has a unique, descriptive title and meta description, with no duplicates flagged.
4. Headings. Each page has exactly one H1 and a logical heading order beneath it.
5. Speed and stability. PageSpeed Insights reports passing Core Web Vitals on your top templates, mobile and desktop.
6. Mobile and HTTPS. Pages render correctly on a phone and load over a valid HTTPS certificate.
7. Links. The Search Console Links report shows a steady, natural profile with no sudden spam spikes.

Anything that fails becomes a task. Handle the structural items, indexing and crawl errors, before the cosmetic ones, because a page Google cannot reach gains nothing from a polished title.

Common audit mistakes to avoid

Two traps catch people running their first audit. The first is chasing a single "SEO score" from a third-party widget and treating a higher number as the goal. Those scores are arbitrary marketing devices, not something Google measures, and optimising for them wastes effort. The second is trying to fix everything at once. A real site has dozens of small issues, and most are minor. Rank them by impact, fix the handful that block indexing or break the experience, and let the trivial ones wait. An audit is a prioritised to-do list, not a demand for perfection.

Turning an audit into an ongoing process

A one-off audit fixes today's problems and then decays. The sites that stay healthy schedule a light monthly check: scan for new broken links, watch the indexing and Core Web Vitals trends in Search Console, and confirm new pages are getting indexed. That habit turns the audit from an occasional fire drill into steady maintenance.

Frequently asked questions

Can I do an SEO audit for free?

Yes. Google Search Console, Google PageSpeed Insights, the free Screaming Frog tier, and Bing Webmaster Tools together cover indexing, speed, technical health, and links at no cost. That combination is a genuine audit, not a cut-down demo.

What does an SEO audit check?

It checks four areas: whether search engines can crawl and index your pages, whether each page clearly answers its target query, whether the site is technically healthy and fast, and whether it earns enough quality links to be trusted.

What should I fix first after an audit?

Fix indexing problems first, because an unindexed page cannot rank at all. Then repair broken links and redirect chains, then Core Web Vitals, and finally on-page relevance and content gaps. Structural fixes give the biggest return.

What are good Core Web Vitals scores?

Largest Contentful Paint should be within 2.5 seconds, Interaction to Next Paint should be 200 milliseconds or less, and Cumulative Layout Shift should be 0.1 or less, measured at the 75th percentile of real page loads across mobile and desktop.

Does 404Pulse have its own SEO audit tool?

No. 404Pulse does not run a proprietary scanner or generate a magic score. This guide points you to real, free tools such as Google Search Console and PageSpeed Insights, and explains how to fix what they report.