FreeCrawl

FreeCrawl is an open-source desktop SEO crawler that runs locally with unlimited URL crawling. It is best suited to agencies, e-commerce teams, developers, technical SEO practitioners, and consultants who need deep audits plus automation without subscription costs. Its local privacy model and broad feature set are compelling, while capacity ultimately depends on your own computer.

Overview

FreeCrawl combines site auditing with Spider, List, SERP, and Compare modes, supporting up to 50 parallel workers. Crawl data remains in a SQLite project file on your machine; crawls are not uploaded, and there is no telemetry or sign-in requirement. That is a strong fit for confidential client or internal data, although local storage makes memory and disk space your responsibility.

The crawler has no URL quota. The publisher says 1,000,000 or more URLs are comfortable on a modern laptop, with available memory and disk space as the hard limits. This gives substantially more room than quota-based free crawlers, but actual throughput and project size still vary with the host computer.

Key features

Audits and rendering

More than 200 checks span 14 categories, including indexability, mobile, accessibility, performance, security, and structured data. Bundled Chromium through Playwright renders JavaScript and adds screenshots, LCP-candidate detection, and mobile-usability audits. Sites that rely heavily on client-side rendering therefore receive more useful coverage than a crawler limited to raw HTML.

Extraction and data access

Custom CSS and regular-expression extraction, plus literal and regex searches, let technical users define exactly what to collect. Exports in XLSX, CSV, JSON, and XML support spreadsheet analysis and downstream systems. Integrations cover Google Search Console, GA4, Google Sheets, BigQuery, PageSpeed Insights, Ahrefs, Moz, Semrush, Majestic, OpenAI, Anthropic, and Ollama, giving teams multiple ways to combine crawl and marketing data.

Automation and AI control

A headless CLI and GitHub Actions and GitLab CI templates make recurring audits practical in development pipelines. The MCP server lets Claude Code and other MCP-compatible clients start crawls, query results, and run reports. Optional AES-256-GCM encrypted project snapshots protect stored projects, while integration credentials use the operating system credential store.

Input limitation

List mode accepts URL lists from CSV, sitemap.xml, or Google Search Console exports. Screaming Frog .seospider project files cannot be imported, which is a meaningful obstacle for teams migrating established projects from that tool.

Pricing

FreeCrawl costs nothing, billed free forever, with unlimited URLs. The FreeCrawl plan is also free, billed Free forever, and includes unlimited URLs on Windows, macOS, and Linux. There is no paid tier and no free trial because the product is permanently free. The trade-off is that you provide the hardware and storage needed for large local crawls rather than buying hosted capacity.

Platforms

Desktop builds support Windows, macOS, and Linux. It is also self-hosted, matching organizations that want local control rather than a cloud account. The headless CLI and CI templates extend use beyond an interactive desktop workflow.

Who it's for

SEO agencies can run quota-free client crawls and keep projects local. E-commerce teams benefit from broad checks, JavaScript rendering, and repeatable CI audits across large catalogs. Developers and technical SEO specialists get extraction rules, command-line automation, and MCP control. Solo consultants receive a capable audit stack without recurring fees. It is less suitable when a team depends on importing Screaming Frog project files or lacks a machine with enough memory and disk capacity for its sites.

Pros and cons

• Pro: Unlimited URLs and a stated comfort level of 1,000,000-plus URLs on a modern laptop remove common free-plan quotas.
• Pro: Local SQLite storage, no telemetry, and no sign-in keep crawl data on the user's machine.
• Pro: More than 200 checks, Playwright rendering, and mobile and performance signals provide substantial technical coverage.
• Pro: CLI, CI templates, exports, integrations, and MCP support suit automated and developer-led workflows.
• Con: Memory and disk space are the hard scaling limits, so very large projects depend on the user's hardware.
• Con: Screaming Frog .seospider projects cannot be imported, complicating migration.
• Con: Bug reports and feature requests go through GitHub Issues; private email support is available with replies within 48 hours.

Alternatives

Choose Lighthouse instead for a free, open-source automated web-page audit available through API, extension, Linux, macOS, web, and Windows.

Open SEO Crawler is another free, MIT-licensed, self-hosted option with unlimited URLs and no account, API key, or per-URL billing.

Pick A1 Website Analyzer if you prefer a Windows or macOS freemium app whose free mode continues after a 30-day evaluation but limits sites to 500 page URLs and 500 imported URLs.

Beam Us Up is a completely free crawler for Linux, macOS, and Windows with no stated limits.

Checkbot offers a browser extension and desktop options, with a free Basic plan limited to 100 URLs per crawl and ad supported; its Professional yearly plan costs $10 a year.

Crab is free, open-source software for Linux, macOS, and Windows with no URL limits, subscriptions, or per-use charges.

Greenflare is a free, GPLv3+-licensed open-source crawler for macOS, Windows, and Linux.

Choose Netpeak Spider if a freemium desktop product with a 500-URL, five-thread free tier for two devices better matches your workflow.

For broader discovery, compare FreeCrawl with SEO Audit Software, SEO Crawler Software, and SEO tools.

Verdict

FreeCrawl is a strong recommendation for anyone needing a serious, open-source crawler with unlimited URLs, deep audit coverage, local privacy, and automation at no cost. Look elsewhere if your workflow depends on Screaming Frog project imports or if your machines cannot supply the memory and disk space that large local crawls require.