1 · See it
The agent view
The answer an agent receives about any domain, rendered for a person: each action’s decision and the reason.
What is a website audit? What it checks, what it costs, and how to run one free
In one sentence
A website audit is a structured check of a website's technical health, search visibility, security, accessibility, speed and content, producing a list of specific problems with evidence and a prioritised plan to fix them.
A website audit is a check of everything that decides whether a site works for the people and machines that visit it: whether search engines and AI assistants can reach and read it, whether it is secure, fast, accessible and consistent about who runs it. A useful audit names each problem with the exact URL and evidence and puts the fixes in order. Type a domain below to run one now, free.
Measured
What the scan measures for this
Reach
Whether search engines, AI crawlers and a normal browser all receive the same page, or some are refused or served less.
Readability
Whether the content is visible text before JavaScript runs, and how much of the page is code.
Accessibility
Headings, landmarks, labels and the structure a screen reader needs.
See this section on a real report: Accessibility structure →
For agents
What an agent is told about the same site
An agent does not read the report. It asks one endpoint before it reads, cites, connects or transacts, and gets a signed answer built from the same measurement.
2 · Call it
One endpoint
GET /api/v1/resolve?domain= returns the signed answer; preflight returns a decision and a receipt for one action.
3 · Check it
Without trusting us
Every answer is Ed25519-signed and logged; it verifies offline with the published key.
Workflow
The workflow
- Scan the homepageThe free scan reads the homepage and the files around it: about thirty requests, about twenty seconds.
- Fix in orderReach first, then readability, then everything else. A page nobody can reach cannot be improved by anything else.
- Audit every pagePaid plans walk every URL the sitemap declares and name each page with a problem.
- Keep a recordA site that passed once can break on the next deploy. Re-measuring catches the regression.
Free
Free tools for this
Each one is a single request to the domain you name, answered as text or a download. Put the domain on the end of the URL, or use the form on the tools page.
Free SEO auditThe technical SEO checks, with every crawler compared.Technical SEO auditCrawl access, sitemap, hosts, links and speed.Compare two sitesYour site against a competitor, side by side.
Reading
Read next
- SEO audit tools: what each one actually fetches
- Nine things a screen reader needs before contrast matters
- PageSpeed Insights and Lighthouse vs an AI crawler audit
Start from what you are checking
llms.txt auditdoes yours resolve, parse and match the site it describes?robots.txt for AI crawlerswhat yours actually permitsEntity map validatordoes your entitymap.json parse, and does every claim in it resolve?SEO audit toolthe technical checks, plus what AI crawlers actually receiveTechnical SEO auditcrawl access, sitemap, hosts, links and speed, checked in one scanLocal SEO auditdoes your site say who you are, where, and does every listing agree?SEO audit reports for agenciesyour name on the report, the proof still attachedWhat is an SEO auditWhat is an SEO audit? The checks that matter, in the order to fix themAEO auditcan ChatGPT, Claude, Perplexity and Google reach, read and quote your site?
You cannot pay to improve a score. A licence adds the lists behind the counts and the record over time - never a better grade.
Questions about this page
QWhat is a website audit?
A structured check of a site's crawl access, content, security, accessibility, speed and identity, which produces a list of problems, each with the URL and the evidence, in the order they should be fixed.
QWhat is the difference between a website audit and an SEO audit?
An SEO audit is the part that decides search visibility: crawl access, sitemaps, structured data, titles and speed. A website audit is broader and also covers security, accessibility and how the site serves real visitors.
QHow much does a website audit cost?
Automated audits range from free to a few hundred dollars a month; a manual audit by a consultant usually costs more. The CrawlCheck scan is free with no signup; paid plans add the whole-site walk, history and alerts.
QHow long does a website audit take?
An automated homepage audit takes under a minute. A full crawl of a large site takes longer, and a manual review takes days.
QWhat is an AI website audit?
An audit that also checks how AI systems see the site: whether AI crawlers such as GPTBot, ClaudeBot and PerplexityBot are served the same page as a browser, and whether the site publishes files like llms.txt that machines read. CrawlCheck runs both halves in the same scan.