What is LibreCrawl?
LibreCrawl is an open-source SEO crawler used to perform technical website audits. It analyzes meta tags, schema markup, hreflang, and PageSpeed metrics to help SEO professionals identify and fix issues on their sites. Agent Analytics can track when it visits your website.
Category
Expected Behavior
LibreCrawl maps sites the way its customers' SEO tools need, following internal links to build a full picture of structure, content, and ranking signals. Expect thorough crawls rather than spot checks, with frequency rising when your site or your competitors are actively monitored in its tools.
Overview
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | July 6, 2026 |
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
As of July 6, 2026, 0% of top websites block LibreCrawl in their robots.txt files.
Overall SEO Crawler Traffic
As of July 6, 2026, 2.4% of all web traffic came from SEO crawlers.
This data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the world's top 1000 websites and their robots.txt files.
LibreCrawl's User Agent
| User Agent | LibreCrawl/1.0 (Web Crawler) |
Access other known user agents and IP addresses using the Enterprise API.
How To Block LibreCrawl
Add this rule to your robots.txt file to block LibreCrawl from accessing your entire website. You can customize which pages are blocked by swapping out / for a different path.
User-agent: LibreCrawl # https://knownagents.com/agents/librecrawl
Disallow: /Frequently Asked Questions
Should I Block LibreCrawl?
Only if you want your own pages and outbound links out of those tools. LibreCrawl collects the ranking and backlink data behind SEO tools, likely including ones you or your agency use, and it does not change how search engines rank you. Blocking it will not hide your backlink profile either, because backlinks are discovered on the sites that link to you. Almost none of the top websites we track have robots.txt rules for LibreCrawl right now.
Does LibreCrawl Respect Robots.txt?
Yes. LibreCrawl is expected to honor robots.txt rules, so a disallow rule is the right first move. Automatic Robots.txt adds and maintains that rule for you, and Agent Analytics confirms LibreCrawl actually honors it.
Does LibreCrawl Access Private Content?
Login walls stop it. LibreCrawl analyzes public pages for rankings, links, and site structure.
Why Is LibreCrawl Visiting My Website?
Your domain shows up in the ranking, backlink, and competitor data LibreCrawl's operator sells. If anyone tracks your site or your competitors in an SEO tool, LibreCrawl visits you.
How Can I Tell if LibreCrawl Is Visiting My Website?
Agent Analytics tracks LibreCrawl visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user agent string contains "LibreCrawl". Look for full site crawls that follow your internal links. Keep in mind that LibreCrawl doesn't publish a verification method, so any client can claim its user agent string and a log match is a hint rather than proof.