Robots.txt Generator
Create, customize, and validate your robots.txt with AI crawler management
Google ignores Crawl-delay. Bing and Yandex support it.
This free robots.txt generator turns crawler control into a one-click job. Pick a template — Standard, WordPress, E-commerce, Block AI Training, or Strict — and the robots txt builder assembles a syntactically clean file with sitemap, allow, and disallow directives ready to paste at your domain root. Beyond search engines, it ships with structured AI crawler control: separate toggles for training bots like GPTBot, ClaudeBot, and Google-Extended versus AI search agents like ChatGPT-User and PerplexityBot. Furthermore, the built-in URL tester simulates a crawler hitting any path before deployment. In short, this robots txt creator covers 35+ user agents across Search, AI Training, AI Search, Social, and SEO categories — without ads, signups, or server-side processing.
Why This Robots.txt Generator
Most online robots.txt generators stop at User-agent: * and a Disallow line. That is fine for a brochure site in 2015, but it leaves a 2026 site exposed to dozens of AI training crawlers, AI search agents, and SEO scrapers that did not exist a few years ago. Consequently, this robots txt generator was built around the gaps in existing tools.
The generator covers five practical templates: Standard (search-friendly baseline), WordPress (admin and feed paths pre-filled), E-commerce (cart, checkout, and search results blocked), Block AI Training (opt out of LLM datasets), and Strict (lock down everything except homepage and sitemap). Each template is editable — pick the closest match, then refine.
For AI crawler control, 35+ user agents are organized into five collapsible groups: Search (Googlebot, Bingbot, YandexBot…), AI Training (GPTBot, ClaudeBot, Google-Extended, CCBot, Bytespider…), AI Search (ChatGPT-User, PerplexityBot, OAI-SearchBot…), Social (FacebookBot, Twitterbot…), and SEO (AhrefsBot, SemrushBot, MJ12bot…). Toggle individual bots or entire groups in one click.
Furthermore, the tool includes real-time validation (catches missing colons, malformed paths, and impossible Allow/Disallow combinations) and a built-in URL tester that simulates how Googlebot, Bingbot, or GPTBot would handle a specific path before you deploy. No other free generator combines these four features.
How it compares
| Tool | Templates | AI Crawlers | Validation | Free |
|---|---|---|---|---|
| CleverUtils Robots.txt Generator | 5 (incl. AI block) | 35+ across 5 groups | Real-time + URL tester | Yes, no signup |
| Smart Robots.txt Generator (Google’s basic) | 1 generic | Not categorized | None | Yes |
| SEOptimer Robots.txt Generator | 1 default | Limited list | Syntax only | Yes, account optional |
| Yoast SEO (plugin) | WordPress only | Manual entry | WP-bound | Free tier in WP |
| Manual editing | None | Whatever you remember | None | Yes, but error-prone |
In practice, you can pair this tool with the complete robots.txt guide for 2026 for context, then move to the Canonical URL Generator once your crawl rules are in place.
What is Robots.txt?
A robots.txt file is a plain text file placed at your website’s root (e.g., https://example.com/robots.txt) that tells crawlers which pages they can or cannot access. It follows the Robots Exclusion Protocol, defined in RFC 9309.
Every major search engine respects robots.txt. When Googlebot, Bingbot, or any compliant crawler arrives, it checks /robots.txt first. Robots.txt controls crawling (fetching pages) — not indexing (appearing in search results). For indexing control, use noindex meta tags.
Crawl Control
Specify which paths crawlers can and cannot access on your site.
AI Bot Management
Block AI training crawlers while allowing AI search bots for visibility.
Sitemap Discovery
Point crawlers to your XML sitemap for better content discovery.
AI Crawlers: Training vs. Search
In 2026, the most critical robots.txt decision is managing AI crawlers. There are two distinct categories:
AI Training Crawlers
These bots scrape content to build datasets for large language models. Blocking them prevents your content from being used for model training but has no effect on search visibility. Nearly 21% of top websites now reference GPTBot in their robots.txt.
AI Search Crawlers
These bots fetch pages on-demand for AI-powered search results (ChatGPT browsing, Perplexity, Google AI Overviews). Allowing them means your content can appear as a cited source in AI search, driving traffic to your site.
| Bot | Owner | Type | Recommendation |
|---|---|---|---|
GPTBot | OpenAI | Training | Block if protecting content |
Google-Extended | Training | Block to opt out of Gemini training | |
ClaudeBot | Anthropic | Training | Block if protecting content |
CCBot | Common Crawl | Training | Block to reduce AI dataset inclusion |
ChatGPT-User | OpenAI | Search | Allow for AI search visibility |
PerplexityBot | Perplexity | Search | Allow for AI search citations |
Directives Reference
| Directive | Purpose | Example |
|---|---|---|
User-agent | Target specific crawler | User-agent: Googlebot |
Disallow | Block path from crawling | Disallow: /admin/ |
Allow | Override broader Disallow | Allow: /admin/ajax.php |
Sitemap | Point to XML sitemap | Sitemap: https://example.com/sitemap.xml |
Crawl-delay | Seconds between requests | Crawl-delay: 10 |
* (wildcard) | Match any string | Disallow: /*.pdf$ |
$ (end) | Match end of URL | Disallow: /page?*$ |
Best Practices
- Test your robots.txt before deploying
- Use absolute URLs for Sitemap directives
- Include a Sitemap reference for better discovery
- Review quarterly — new bots appear regularly
- Use Allow to override broader Disallow rules
- Block AI training bots if protecting content
- Use robots.txt for security (it’s publicly readable)
- Block CSS/JS files (prevents page rendering)
- Expect robots.txt to remove already-indexed pages
- Use Disallow: / unless you want to block everything
- Forget the trailing slash on directory paths
- Assume all bots respect robots.txt
Common Mistakes
| Mistake | Impact | Fix |
|---|---|---|
| Blocking CSS/JS files | Search engines can’t render pages correctly | Allow /wp-content/, /assets/ |
| Using robots.txt for noindex | Pages may still appear in SERPs via backlinks | Use <meta name="robots" content="noindex"> |
| Relative sitemap URLs | Crawlers can’t find your sitemap | Use full URL: https://example.com/sitemap.xml |
| Blocking the entire site accidentally | Complete de-indexing over time | Use specific paths instead of Disallow: / |
| Not managing AI crawlers | Content used for AI training without consent | Explicitly block unwanted AI bots by user-agent |
| Forgetting case sensitivity | Rules may not match intended paths | Match the exact case of your URL paths |
Frequently Asked Questions
Not directly. Robots.txt controls which pages Googlebot can crawl, but it doesn’t influence how pages rank once indexed. However, misconfigured robots.txt can prevent important pages from being crawled and indexed at all, which effectively removes them from search results.
Yes. Each AI company uses specific user-agent tokens. For example, GPTBot for OpenAI’s training crawler, ClaudeBot for Anthropic, and Google-Extended for Google’s Gemini training. Block them individually with their user-agent names. Note: blocking GPTBot blocks training only — the separate ChatGPT-User agent handles AI-powered search.
Always at the root of your domain: https://example.com/robots.txt. It must be accessible at this exact URL. Subdomains need their own robots.txt files — https://blog.example.com/robots.txt is separate from the main domain’s file.
Google caches robots.txt for up to 24 hours. After updating, changes typically take effect within a day. You can request a re-crawl through Google Search Console for faster processing. Bing and other engines may take longer.
It depends. SEO tool crawlers (AhrefsBot, SemrushBot, etc.) index your backlinks and keywords. Blocking them hides your data from competitors but also prevents you from analyzing your own site in these tools. Most sites leave them at default settings.
Review at least quarterly. New AI crawlers emerge regularly, site structure may change, and outdated rules can harm SEO. After any major site restructure, migration, or launch, verify that your robots.txt still reflects current requirements.
A robots.txt generator is a tool that produces a syntactically valid robots.txt file from a checklist of crawlers and paths, instead of forcing you to memorize directive syntax. A good robots txt builder exposes templates, lets you toggle search and AI bots independently, and validates rules in real time. The output is a plain text file you upload to your site root at /robots.txt.
Add explicit user-agent blocks for each token. For example: User-agent: GPTBot followed by Disallow: /, then a separate stanza User-agent: ClaudeBot with Disallow: /. The “Block AI Training” template in this generator does both — plus Google-Extended, CCBot, and Bytespider — in one click. Note: blocking GPTBot stops training only; ChatGPT-User handles AI search and is a separate agent.
They control different things. Robots.txt blocks crawling (the bot does not fetch the page). The noindex meta tag blocks indexing (the page is fetched but excluded from search results). Use noindex for pages you want kept out of SERPs, such as thank-you pages or thin tag archives. Use robots.txt for paths you do not want crawled at all, such as /wp-admin/ or faceted-search URLs. A page blocked by robots.txt can still appear in SERPs if it has external links — only noindex reliably suppresses that.
Use the URL tester built into this generator: enter a path, pick a user-agent (Googlebot, Bingbot, GPTBot, or all), and see the allow/block verdict instantly. For an additional check, paste the file into Google Search Console’s robots.txt Tester before uploading. Subsequently, after deploying, fetch yoursite.com/robots.txt in a private browser window to confirm the file is publicly readable.
Mostly no. Googlebot ignores Crawl-delay entirely — set crawl rate inside Search Console instead. Bingbot, YandexBot, and most other crawlers do honor it. Therefore, treat Crawl-delay as a hint for secondary engines, not a Google control. For very large sites struggling with crawl budget, a properly structured sitemap and clean internal linking move the needle far more than crawl-delay ever will.
It depends on whether your content is a competitive asset. Block training bots (GPTBot, ClaudeBot, Google-Extended, CCBot) if you publish original research, paid content, or proprietary data you do not want absorbed into LLMs. Conversely, allow them if visibility in AI assistants is part of your traffic strategy — many publishers split the decision by blocking training agents while explicitly allowing AI search bots like ChatGPT-User and PerplexityBot, which can drive cited traffic back to your site.