AI Bot Blocker — Free robots.txt to Block GPTBot, ClaudeBot & More

About This Free Online AI Bot Blocker (robots.txt)

Our free AI Bot Blocker builds a robots.txt file that stops AI crawlers from scraping your website to train their models or feed their answer engines. AI companies run dozens of crawlers — OpenAI's GPTBot, Anthropic's ClaudeBot, Google-Extended (Gemini), Applebot-Extended, PerplexityBot, ByteDance's Bytespider, Amazonbot, Meta's crawler, Common Crawl's CCBot and many more — and most site owners have no idea they are even there. This tool lists every major AI user-agent with a plain-English description of exactly what it does, so you can decide who gets access to your content. Toggle individual bots, or use the one-click presets: block all AI crawlers, allow all, or block only the bots that use your content for model training while still allowing the ones that drive referral traffic (like search and live-browsing user agents). You can paste your existing robots.txt to merge the new rules in cleanly, add your sitemap URL, and the file updates live. When you are done, copy it or download robots.txt and upload it to the root of your site. Note that robots.txt is a respected convention, not a hard technical block — the major, well-behaved AI crawlers honor it. Everything runs in your browser: nothing is uploaded, there is no signup and no watermark.

Features of Our AI Bot Blocker (robots.txt)

Every major AI crawler listed with a plain-English description
Covers OpenAI, Anthropic, Google, Apple, Perplexity, Meta, Amazon, ByteDance, Common Crawl and more
Toggle bots individually, or use Block all / Allow all / Block training-only presets
Merge the rules into your existing robots.txt
Add your sitemap URL; file updates live
Auto-saves your selection in your browser
One-click copy and download as robots.txt
100% private and free — built entirely in your browser, no signup

How to Use the AI Bot Blocker (robots.txt)

The AI Bot Blocker (robots.txt) works right in your browser — no signup, no installation. Follow these steps:

Review the AI crawlers grouped by company, each with what it does.
Toggle the bots you want to block, or use a one-click preset.
Optionally paste your current robots.txt to merge, and add your sitemap URL.
Copy or download the generated robots.txt.
Upload robots.txt to the root of your site (e.g. https://example.com/robots.txt).

Frequently Asked Questions About AI Bot Blocker (robots.txt)

Does blocking AI bots in robots.txt actually work?

robots.txt is a widely respected convention. The major, well-behaved AI crawlers (GPTBot, ClaudeBot, Google-Extended, PerplexityBot and others) document that they honor it. It is not a hard firewall — bad actors can ignore it — but it is the standard, recommended first step.

What is the difference between training bots and search bots?

Some crawlers (like GPTBot, Google-Extended, CCBot) collect content to train AI models; others (like OAI-SearchBot, PerplexityBot) index pages so your site can appear and be linked in AI answers. The "block training-only" preset blocks the former while keeping the latter, which can still send you traffic.

Will this hurt my Google search ranking?

No. Blocking Google-Extended only affects use of your content for Gemini/AI training — it does not affect Googlebot or your normal search indexing.

Can I combine this with my existing robots.txt?

Yes. Paste your current robots.txt into the merge box and the AI-blocking rules are added cleanly below your existing rules.

Is my data uploaded anywhere?

No. The file is generated entirely in your browser. Nothing you enter is sent to a server, and there is no signup or watermark.

Why Choose the AI Bot Blocker (robots.txt)?

The AI Bot Blocker (robots.txt) runs AI directly in your browser, on your device. There is no signup, no API key, and no upload — the model processes your input locally, so you get the result without handing your data to a third party.