About

A technical SEO crawler that respects your time and your data

Crawlens is a free desktop app for Windows that crawls websites, runs 70 technical SEO checks, and lines every issue up with Search Console, Analytics and Core Web Vitals data, so you know what to fix first.

70built-in audit rules
100,000URLs per crawl, free
19releases shipped since v0.3.0
v0.20.1current version

Why Crawlens exists

A crawl produces thousands of rows. The useful part, deciding what actually matters for this site and explaining it to the person who'll fix it, is still mostly manual. Crawlens is built to shorten that part.

It does that by putting the audit first: every crawl ends with a health score and a list of issues with plain-English explanations. It joins Google's own data to every URL, so problems on pages that bring traffic stand out. And it lets AI assistants read the audit directly, so the summary, the prioritised plan and the developer ticket take minutes instead of an afternoon.

What's next

Crawlens ships often. You can follow every release in the changelog. Mac and Linux versions are planned; this site will be updated when they're available.

How we build it

Five principles

  1. 1

    Your data stays on your computer

    Crawls, audits and Google data are stored in a folder you choose. Crawlens doesn’t upload them, and the AI integration is read-only and local.

  2. 2

    Free, with room to work

    Crawlens is free, for crawls of up to 100,000 URLs, with JavaScript rendering, Search Console, GA4 and Core Web Vitals included.

  3. 3

    Explain, don’t just flag

    Every one of the 70 checks says why the issue matters and how to fix it, so the audit is something you can hand to a developer or a client.

  4. 4

    Fit into the tools you already use

    Import exports from Screaming Frog, Sitebulb, Ahrefs or Semrush, connect Google’s APIs, and let Claude, Codex, Cursor or VS Code read your audits over MCP.

  5. 5

    Be honest about trade-offs

    Our comparison pages say where other tools are the better choice, and every competitor fact links to their own website.

Try it on your own site

Questions first? Get in touch.

Download free for Windows