Open the project's Site Audit tab, choose Full Site (5 credits + 1 per page, default 50 pages) or Single Page (6 credits), set page limit and crawl depth, and start; results are scored 0-100 and stored as your baseline in the audit list.
Your first site audit takes a few minutes to set up and gives you a scored, prioritized snapshot of your site's technical health. This walkthrough uses the Site Audit tab inside a project; the standalone tool page works the same way (see Starting Your First Site Audit for that route).
You need a project (its domain pre-fills the audit) and enough credits: a full site audit costs 5 credits plus 1 credit per crawled page, so the default 50-page crawl is 55 credits. A single page audit is 6 credits.
Start at the top: the overall score (0-100) and the split of issues, warnings, and passed checks. Then work the grouped results in this order:
If a check doesn't apply to your site, use Skip this check so future audits stay focused (restorable any time from the skipped/hidden panel).
This first audit is your reference point. It's stored in the audit list with its date, score, and issue count; later audits line up next to it so improvement is visible without any spreadsheet work. Two follow-ups worth doing immediately:
How long does an audit take?
It depends on pages crawled and how fast your server responds - small crawls finish in minutes. The audit continues in the background if you navigate away.
Why were fewer pages audited than my limit?
The crawler found fewer pages within your crawl depth. Pages with no internal links only get included if they're in your sitemap.
Do I pay for pages that fail to load?
Crawled pages count toward the per-page cost; 4xx/5xx responses are themselves findings the audit reports.