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.
Website audit: SEO, security headers, accessibility and speed, checked in one free scan
In one sentence
A website audit is the check of a site's reach, readability, security headers, accessibility structure and speed, with each problem named against the URL and the bytes that decided it. The definition of the term, and what an audit costs, is a different page.
This is the audit, not the definition of one. Type a domain. The free scan checks whether search and AI crawlers can reach the page, whether the content is readable before JavaScript runs, whether HTTPS and HSTS are in place, whether the page has the structure a screen reader needs, and how fast it is where Chrome publishes field data. What a website audit is, and what one costs, is a separate page.
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.
Discovery
robots.txt, the sitemap and the pages the homepage links to that the sitemap never declares.
Security headers
HTTPS, HSTS and whether the www and bare hostnames both answer with the same page.
Accessibility
Headings, landmarks, labels and the structure a screen reader needs. Contrast is not what this row measures.
See this section on a real report: Accessibility structure →
Speed
Core Web Vitals from field data where Chrome publishes it, and a lab reading where it does not.
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 homepageAbout thirty read-only requests and about twenty seconds. Nothing is installed and nothing on the site changes.
- Read the grade in orderReach first, then whether the words are in the HTML, then security, accessibility and speed. A page no crawler can fetch cannot be improved by a faster one.
- Open the explainer if you wanted the definitionWhat the audit includes, what it costs and how it differs from an SEO audit is on the what-is page, linked below.
- Re-scan after the fixThe second scan is the evidence. A watched domain is re-measured twice a day.
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.
What a website audit isThe definition, what it costs, and how it differs from an SEO audit.The SEO halfCrawl access, sitemap, structured data, titles and what each crawler is served.Technical SEO auditHosts, redirects, internal links and speed, in more detail.
Reading
Read next
- SEO audit tools: what each one actually fetches
- Nine things a screen reader needs before contrast matters
- HSTS 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 a website auditWhat is a website audit? What it checks, what it costs, and how to run one freeWhat 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?Local SEO auditname, phone, address and listings, in the order to fix themSEO NAP checkername, address and phone, on the site and on the directories
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 does a website audit check?
Whether crawlers can reach the page, whether the words are in the HTML, whether HTTPS and HSTS are sent, whether the page has headings and landmarks a screen reader can use, and how fast it is where field data exists.
QHow is this different from the page that explains what a website audit is?
That page defines the term and what one costs. This page is the audit: the same free scan as the homepage, opened on those checks.
QDoes a website audit include SEO?
Yes. Crawl access, the sitemap, structured data and what each named search and AI crawler is served are part of it. The SEO audit tool is that half on its own.
QIs the website audit free?
Yes. The scan, the grade and the fix list are free with no signup. Paid plans add the whole-site walk, the dated record and alerts.