What Is a Website Audit? Meaning, Types and Three Depths
A plain definition of a website audit, the six common types and the three depths an agency uses.
Robbert Veer, Founder
4 min read
A website audit is a structured review of a website that checks how well it loads, reads, ranks and turns visitors into customers. It ends in a ranked list of fixes. An agency also uses a website audit to decide which businesses to contact, because a weak site is a reason to write.
What is a website audit used for?
A website audit is used to find what costs a site its visitors and to put the fixes in order. The purpose shifts with the person who runs it.
- An owner runs one to learn why the site brings in fewer calls than it should.
- A developer runs one before a redesign, to know what to keep.
- An agency runs one on a business it has never spoken to. The result decides whether that business gets a letter, and what the letter says.
The third use has data behind it. We scored 20,000 Dutch company websites and emailed three groups. Businesses with the weakest 20% of sites replied positively about 3.2 times as often as a random sample of the rest. The test covered email only, and the method is in our write-up of the test.
What are the types of website audits?
There are six common types of website audits, and a full audit combines all six.
| Type | What it checks |
|---|---|
| SEO audit | Whether search engines can find, read and index the pages |
| Content audit | Whether each page is accurate, current and useful |
| Performance audit | How fast the pages load and respond |
| Accessibility audit | Whether people with disabilities can use the site, measured against WCAG |
| Security audit | HTTPS, certificates and signs of a hacked site |
| UX and conversion audit | Whether a visitor can find the next step and take it |
Twip, the AI inside Leadodo, covers the same ground in 10 domains. The first five are design, speed, mobile, security and SEO. The other five are accessibility, content, conversion, trust and technology. Our website audit checklist gives three manual checks for each one.
How deep does a website audit go?
A website audit comes in three depths, and each one fits a different moment.
| Depth | What it is | Time per site | Used for |
|---|---|---|---|
| Quick check | A few signs anyone can see from the outside | A few minutes | Picking prospects by hand |
| Score | Software rates every site on a list | None by hand | Ranking a whole list |
| Full audit | 30 or more checks, with evidence for each | About an hour | A sales call or the start of a project |
The times are our own estimates. For scale, our write-up of an earlier campaign puts a manual review of 1,382 websites at about 8 minutes a site, or about 184 hours.
Most definitions describe only the full audit. An agency needs all three. The quick check is in our guide to the 9 signs that a business needs a new website.
Who runs a website audit, a tool or a person?
Both do. A tool measures, and a person decides what matters.
Tools handle what can be counted. Google counts a page as good when its main content appears within 2.5 seconds (web.dev), and a scanner reports that figure for any address. The scoring model in our October 2026 study used Google Lighthouse and axe-core for the technical and accessibility checks, and an AI model for the visual and content analysis.
A person handles the order of the fixes. A quote form that fails costs a roofer more than a slow page, and no tool knows what the business sells.
Some agencies deliver audits under their own brand from software they license. Our guide to the white label website audit covers that route.
Questions
What is a website audit report?
A website audit report is the document that presents the findings to the owner of the site. A useful one fits on two pages, with a summary, a scorecard, three findings and a fix list in order. Our website audit template has a version to copy.
What is the difference between a website audit and an SEO audit?
An SEO audit is one type of website audit. It checks whether search engines can find and rank the pages. A full website audit also covers speed, accessibility, security, content and whether a visitor can take the next step.
How often should a website be audited?
After every redesign or change of platform, and once a year otherwise. That is our advice, and no rule sets it.
Can you audit a website you do not own?
Yes. Speed, mobile layout, security, content and broken forms are all visible from the outside. Visitor numbers and search queries stay hidden, so an outside audit should say what it could not see.
Next step. See how Twip scores a website out of 100 across 10 domains. See AI analysis.
