Block specific paths, add allow exceptions and your sitemap URL, optional AI bot blocking, copy-ready output, no sign-up.
Starter robots.txt for a new site, blocking AI crawlers, adding a sitemap line before launch.

Useful that the toggle exists, and one thing worth spelling out next to it: blocking AI bots is not one decision. Training crawlers (GPTBot, CCBot, Google-Extended) and search or retrieval crawlers (OAI-SearchBot, PerplexityBot, ChatGPT-User) do different jobs, and blocking the second group means your pages cannot be cited in AI answers at all. A split option, block training but allow search bots, would cover what most product sites want. Also worth reminding people that a blanket "Disallow: /" under "User-agent: *" blocks those search bots too.
The AI bot blocking toggle is what sets this apart — most robots.txt generators just handle allow/disallow paths and ignore the AI crawler question entirely. Including the sitemap URL line in the generated file is a genuinely useful touch, since that is the step people forget right after editing. One question: does the preview let you edit or reorder rules before copying the file, or do you start over if you spot a mistake?
Useful, and the AI bot toggle is what I'd use it for. From running two content sites: robots.txt only stops the polite crawlers (GPTBot, ClaudeBot, CCBot); most of the scraping we saw came from datacenter IPs with browser user-agents that never read the file. It might help to say that next to the toggle, and maybe note that Google-Extended is only a token: blocking it keeps content out of Gemini training but does not touch Googlebot or search.
No sign-up and copy-ready output is exactly right for a file you touch maybe twice a year. The AI bot blocking toggle is the reason I would pick this over writing the file by hand. One thing I would check: the AI crawler list changes fast (ClaudeBot, PerplexityBot, Bytespider all appeared recently) - how often do you update the list of agents the toggle covers?

This is a handy tool for website owners who want to manage crawling and improve their technical SEO workflow. I also found some useful free SEO and website analysis tools here: https://tools.corenexis.com — worth checking out if you're looking for practical web utilities without signing up.

Useful that the toggle exists, and one thing worth spelling out next to it: blocking AI bots is not one decision. Training crawlers (GPTBot, CCBot, Google-Extended) and search or retrieval crawlers (OAI-SearchBot, PerplexityBot, ChatGPT-User) do different jobs, and blocking the second group means your pages cannot be cited in AI answers at all. A split option, block training but allow search bots, would cover what most product sites want. Also worth reminding people that a blanket "Disallow: /" under "User-agent: *" blocks those search bots too.
The AI bot blocking toggle is what sets this apart — most robots.txt generators just handle allow/disallow paths and ignore the AI crawler question entirely. Including the sitemap URL line in the generated file is a genuinely useful touch, since that is the step people forget right after editing. One question: does the preview let you edit or reorder rules before copying the file, or do you start over if you spot a mistake?
Useful, and the AI bot toggle is what I'd use it for. From running two content sites: robots.txt only stops the polite crawlers (GPTBot, ClaudeBot, CCBot); most of the scraping we saw came from datacenter IPs with browser user-agents that never read the file. It might help to say that next to the toggle, and maybe note that Google-Extended is only a token: blocking it keeps content out of Gemini training but does not touch Googlebot or search.
No sign-up and copy-ready output is exactly right for a file you touch maybe twice a year. The AI bot blocking toggle is the reason I would pick this over writing the file by hand. One thing I would check: the AI crawler list changes fast (ClaudeBot, PerplexityBot, Bytespider all appeared recently) - how often do you update the list of agents the toggle covers?

This is a handy tool for website owners who want to manage crawling and improve their technical SEO workflow. I also found some useful free SEO and website analysis tools here: https://tools.corenexis.com — worth checking out if you're looking for practical web utilities without signing up.
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