Crawl Lab
Crawl Lab is a free, browser-based SEO toolbox for analyzing server logs and AI crawler activity.
What Crawl Lab is
Crawl Lab is a free, browser-based SEO toolbox for analyzing server logs and AI crawler activity. It accepts Apache and Nginx common or combined logs, including compressed .gz files, and reports crawled pages, crawl frequency, wasted crawl budget and errors seen by bots. It detects AI crawlers such as GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, Google-Extended, Bytespider and Amazonbot, and verifies crawler authenticity against official IP ranges. Processing runs locally in the browser: log files and IP addresses do not leave the user’s machine, and files are not uploaded or stored. No account is required. Streaming file processing allows analysis of several gigabytes or a full month of logs without a server-imposed size limit. Crawl Lab is aimed at technical SEO practitioners working on SEO and generative-engine visibility. Its analysis indicates what crawlers fetched, but does not show whether pages were indexed or how they rank. An llms.txt generator and an AI citation audit are listed as coming soon.
Good
- Free with no paid tier
- Processes logs in the browser
- Accepts compressed .gz log files
- Verifies crawlers against official IP ranges
- No server-imposed file size limit
Watch out
- Does not show whether pages were indexed
- Does not report how pages rank
- Listed upcoming tools are not yet available
Who it suits
Crawl Lab suits technical SEO practitioners analyzing site crawl activity and AI crawler visits. It is useful for users who want to inspect logs locally without creating an account.
Verdict
Crawl Lab focuses on what bots fetched from server logs, with local processing and no account requirement. Its results do not establish indexing or ranking, so it addresses crawl activity rather than those outcomes.
Plans and prices
From Crawl Lab's own pricing page, checked 30 Sep 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | no sign-up · no paid tier · no server-side size limit |
The facts
Each one read from Crawl Lab's own pages, with the date it was checked.
What it does
- AI crawlers
- It detects GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, Google-Extended, Bytespider, Amazonbot and other crawlers.checked 30 Sep 2026
- Audience
- The product is aimed at technical SEO practitioners working on SEO and generative-engine visibility.checked 30 Sep 2026
- Bot verification
- The analyzer verifies crawler authenticity using official IP ranges.checked 30 Sep 2026
- Crawl metrics
- It reports crawled pages, crawl frequency, wasted crawl budget, and errors seen by bots.checked 30 Sep 2026
- Limitations
- Log analysis proves what crawlers fetched but does not show whether pages were indexed or how they rank.checked 30 Sep 2026
- Local processing
- All processing runs in the browser and log files and IP addresses never leave the user's machine.checked 30 Sep 2026
- Log formats
- The analyzer supports Apache and Nginx combined or common logs, including compressed .gz files.checked 30 Sep 2026
- No account
- The analyzer requires no registration or account.checked 30 Sep 2026
- Privacy
- Crawl Lab describes the analyzer as RGPD-safe because files are not uploaded or stored.checked 30 Sep 2026
- Purpose
- Crawl Lab is a free SEO toolbox for analyzing server logs and AI crawler activity.checked 30 Sep 2026
- Scale
- The tool reads files in streaming mode and can analyze several gigabytes or a full month of logs without a server-imposed size limit.checked 30 Sep 2026
- Upcoming tools
- Crawl Lab lists an llms.txt generator and an AI citation audit as coming soon.checked 30 Sep 2026
The company
- Headquarters
- Quebec, Canadachecked 23 Sep 2026
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