A technical SEO crawler built for complex websites

Collect and analyze thousands of metrics across your site with full JavaScript rendering, at any scale.

Crawl what you need, when you need it

What Oncrawl offers

Comprehensive auditing
Crawl your site's structure, content, performance, and internal linking with hundreds of standard metrics and the ability to add custom ones.

JavaScript rendering
See your site the way search engines and AI systems do, including JavaScript-rendered content and Core Web Vitals.

Scalability
Crawl millions of URLs without artificial limits on speed, depth, or site size. Built for the sites other crawlers can't handle.

The data foundation behind every technical SEO audit

Configure crawls to match your workflow

Oncrawl manages multiple projects, configurations, and schedules so your team can focus on analysis.

• Define scope, frequency, and notification options for each crawl configuration.
• Run different crawl types for different use cases: audits, monitoring, indexability checks, or custom analysis.
• Manage multiple projects and sites from a single platform.
• Solve rendering, access, and complexity issues that limit other crawlers.

Analyze the metrics that matter for your site

Every website is different. Understand how your content and structure work together.

• Audit crawlability, indexing signals, internal linking, content quality, and performance across your entire site.
• Use custom extraction to collect any on-page data point specific to your site’s setup.
• Contextualize crawl data with signals from GA4, Google Search Console, and other connected sources.
• Focus on the site sections that are most viewed or the highest converting.

Track changes and stay ahead of issues

Discover how changes impact technical health before they affect performance.

• Compare crawl results over time to detect regressions and track improvements.
• Monitor the technical factors that influence how search engines and AI systems evaluate your site.
• Incorporate new metrics as search and answer engines evolve.
• Set up alerts to flag critical changes automatically.

See your site the way search engines do, then make it better

Our clients' results speak for themselves

• "Oncrawl: My Go-To for Technical SEO"

“Oncrawl is key for analyzing large marketplaces and tracking Googlebot. Its strength: combining crawl data, bot hits, and external sources to uncover high-impact SEO actions. I also love the scraping feature and insights on emerging bots like ChatGPT.”

Zbigniew Dróżdż,
Senior SEO specialist

• "Reliable, Insightful & Actionable for Large Sites"

“Oncrawl is my go-to for large sites. Reliable and clear, it visualizes data and offers powerful segmentation. The monitoring system detects issues early. Combining crawl and live log analysis, it helps make smart SEO decisions that improve performance and ROI.”

Andor Palau,
SEO & Online Marketing Consultant

• "Highly recommend Oncrawl’s suite of tools"

“Oncrawl is a fast, scalable tool that helps our team deliver technical audits on large sites. Its speed makes it easy to spot crawlability and indexation issues, and automated reports simplify client communication. Strong integrations enhance our analyses, making Oncrawl highly valuable.”

Mark Stanford,
Organic Performance Lead (Technical)

• "I'd recommend Oncrawl for technical SEO challenges."

“What I really enjoy is that you have pre-defined reports but can also export all the data raw if you like. Big bonus points for the seamless API. Even bigger bonus points for being able to cross-reference with the GSC API and even simple spreadsheets – huge value add when building custom SEO models.”

Kevin Indig,
Growth Advisor