Fetch and inspect the robots.txt file of any domain.
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robots.txt tells crawlers which URLs they may and may not request. A single misplaced Disallow can wipe a site from search results, while a missing one can leak staging environments. This tester fetches any site's robots.txt, displays the rules grouped by user-agent, and highlights conflicts that block legitimate bots. Use it before launching, after every CMS update, and when traffic suddenly drops.
Type or paste the target you want to inspect into the input field at the top of the page.
Click the check button — the tool queries live data sources and returns results in seconds.
Review each finding: status, score, and the reason behind every warning are listed line by line.
Follow the linked remediation guides to fix issues, or copy the report to share with your team.
When something in your stack misbehaves, half the battle is figuring out whether the problem is you, the network, or the other side. Robots.txt Tester gives you a fast, opinionated readout so you can rule things in and out in seconds. Because the check runs on live infrastructure and reports raw results — not marketing-safe summaries — you can trust what you see and act on it. Toolzer's design philosophy is simple: privacy-first (no tracking, no accounts), performance-first (the page is interactive in under a second on a 3G connection), and honesty-first (no fake ratings, no dark patterns, no upsells). Robots.txt Tester follows the same rules as every other utility on the site. You can bookmark this page, share the URL with a colleague, or pin it to your browser's toolbar — the experience will be identical every visit, and it will keep working even if you're on airplane Wi-Fi. Real people use this tool for real work — freelancers cleaning up client deliverables, sysadmins triaging tickets, students finishing assignments — and it is tuned for those workflows, not for demo videos.
It blocks crawling. Pages that are already indexed can stay in search results without a snippet. Use noindex meta tags for true removal.
An optional line that points crawlers at your XML sitemap. It speeds up discovery of new and updated pages.
Yes — and protect it with auth too. robots.txt is a polite request, not a security control.
Compliant search engines obey it. Malicious scrapers do not. Combine robots.txt with rate limits and firewall rules for real defence.
No. Every utility on Toolzer is free, anonymous, and works in any modern browser without registration.
Yes. Whenever the tool can produce an answer entirely in the browser, the data never leaves your device.
Yes. The interface is fully responsive and works on iOS Safari, Android Chrome, and every modern mobile browser.
Yes. Every Toolzer page has a clean permanent URL you can bookmark or share.
Meta tags tell search engines and social networks how to display your page.
robots.txt tells crawlers which URLs they may and may not request.
An XML sitemap lists every URL you want indexed and the date it was last modified.
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