Free Robots.txt Generator & Validator Tool
A robots.txt generator is an online SEO and web administration tool that builds a standardized `robots.txt` text file — formatted according to the Robots Exclusion Protocol — to instruct automated web crawlers and AI bots which sections of a website they are permitted or forbidden to index.
Configure User-Agent directives, toggle access settings for popular search crawlers and AI bots (Googlebot, Bingbot, GPTBot, ClaudeBot), enter Disallow/Allow URL paths, specify your sitemap location, and click Generate to copy or download your valid `robots.txt` file.
Introduction to Robots.txt and Crawler Control
The Robots Exclusion Protocol (REP) is a web standard used by website owners to manage how automated search engine crawlers, indexing bots, and AI web scrapers interact with site resources. Properly configured robots.txt files protect staging environments, admin panels, and duplicate content while directing crawlers to your XML sitemap for efficient indexing.
ScanSuite's free online robots.txt generator creates clean, syntax-validated `robots.txt` files directly in your browser. Easily configure access rules for major search engines like Google and Bing, block aggressive AI scrapers (such as GPTBot and ClaudeBot), define path exclusions, and declare XML sitemaps without syntax errors.
What Is a Robots.txt File?
A `robots.txt` file is a plain text document placed at the root directory of a domain (e.g., `https://example.com/robots.txt`). Search engine bots check this file before crawling site URLs.
Using `User-agent`, `Disallow`, `Allow`, `Crawl-delay`, and `Sitemap` directives, you can protect sensitive admin endpoints, preserve crawling budget on high-volume sites, and prevent AI models from scraping proprietary content.
The file is publicly readable — it guides well-behaved crawlers but must not be treated as an authentication or access-control mechanism for confidential data.
Why Use an Online Robots.txt Builder?
Syntax errors in `robots.txt` files (such as missing slashes or incorrect wildcard placements) can accidentally de-index an entire website from Google Search results.
ScanSuite's interactive generator prevents syntax mistakes with visual toggles for popular bots, path validation rules, and built-in templates for WordPress, Laravel, React, and e-commerce platforms.
SEO teams use generated files to declare sitemap locations, block faceted navigation URLs, and opt out of AI training crawlers without editing raw text by hand.
Who Uses Robots.txt Generators?
SEO specialists and webmasters use robots.txt generators to optimize search engine crawl budgets and declare XML sitemaps.
Web developers and sysadmins configure rule files to block crawlers from indexing staging environments and internal admin paths.
Content publishers and site owners block generative AI scrapers to protect intellectual property from training sets.
How the Robots Exclusion Protocol Works
When a compliant crawler visits a domain, it sends an HTTP GET request for `/robots.txt`. It evaluates the file top-to-bottom for the group matching its specific `User-agent` string or the fallback wildcard `User-agent: *`.
The crawler checks `Disallow` rules against requested URL path prefixes. If a match is found without an overriding `Allow` directive, the compliant bot skips crawling that URL.
Sitemap directives at the file footer help search engines discover XML sitemap URLs even when certain paths are disallowed from crawling.
Sample Robots.txt Configuration
User-agent: *
Disallow: /admin/
Disallow: /cart/
Allow: /
Sitemap: https://scansuite.io/sitemap.xml
Common Robots.txt User-Agent Identifiers
| User-Agent | Bot Name / Type | Purpose | |
|---|---|---|---|
| Googlebot | Google Search Crawler | Discovers and indexes pages for Google Search | |
| Bingbot | Bing / Microsoft Crawler | Indexes pages for Bing and Yahoo Search | |
| GPTBot | OpenAI AI Scraper | Collects web data for AI model training | |
| ClaudeBot | Anthropic AI Scraper | Scrapes content for Claude AI models | |
| * | All Web Crawlers | Default fallback rule group for all bots |
Why Is My Page Still Showing in Google After Disallowing It in Robots.txt?
If other websites link to the URL, Google may index the address without crawling page content. To remove a page completely, use a `<meta name="robots" content="noindex">` tag.
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Frequently Asked Questions
How do I create a robots.txt file?
Choose which crawlers to target, add the paths to allow or disallow and add your sitemap URL. The generator writes the file. Then upload it as `robots.txt` to the root of your domain (`https://example.com/robots.txt`).
Does robots.txt stop a page from being indexed?
No. It controls crawling, not indexing, so a blocked URL can still appear in results if other sites link to it. To keep a page out of search, use a `noindex` meta tag or header and leave the page crawlable.
Where does robots.txt go?
In the root of each host and protocol. `https://example.com/robots.txt` does not cover `https://blog.example.com`.
Should I add my sitemap to robots.txt?
Yes. A `Sitemap: https://example.com/sitemap.xml` line helps every search engine find it. Google ignores `Crawl-delay`.
What is a robots.txt file?
A plain text file placed in a domain's root folder that instructs search engines which paths they can or cannot crawl.
Where should robots.txt be located?
Must be located in the domain root directory, accessible via `https://yourdomain.com/robots.txt`.
Does robots.txt guarantee my pages will not appear in Google?
No. To guarantee a page is excluded from search results, use a `<meta name="robots" content="noindex">` header tag.
How do I block AI crawlers like ChatGPT?
Add `User-agent: GPTBot` and `Disallow: /` to your robots.txt file.
What is the Sitemap directive in robots.txt?
An explicit URL reference telling crawlers where to find your XML sitemap (e.g. `Sitemap: https://site.com/sitemap.xml`).
Are robots.txt directives case-sensitive?
Yes, URL path patterns in Disallow rules are case-sensitive.
What is Crawl-delay in robots.txt?
A directive asking crawlers to wait a specified number of seconds between consecutive page requests.
What happens if I have no robots.txt file?
Search engines assume unrestricted access and crawl all discoverable public pages.
Is robots.txt free to generate on ScanSuite?
Yes, ScanSuite provides unlimited free robots.txt generation without registration.
What is the wildcard character (*) in robots.txt?
Represents any sequence of characters in path matching patterns.
How do I block an entire folder in robots.txt?
Use `Disallow: /foldername/` with trailing slash.
What is the difference between Allow and Disallow?
Disallow forbids crawling a path; Allow explicitly permits crawling a subpath within a disallowed folder.
Can I use comments in robots.txt?
Yes, lines starting with `#` are treated as comments and ignored by crawlers.
How do I test my robots.txt file?
Use Google Search Console's Robots Testing Tool or test URL paths in your browser.
Does robots.txt affect SEO rankings?
Correctly managing crawl budget helps search engines focus on your high-value content.
Can I download the generated file directly?
Yes, click the Download button to save a clean `robots.txt` file.
Should I block CSS and JS files in robots.txt?
No! Search engines need CSS and JavaScript to render pages correctly for mobile indexing.
Does Googlebot respect Crawl-delay?
Googlebot ignores Crawl-delay; configure crawl rate inside Google Search Console settings instead.
Summary
ScanSuite's free robots.txt generator creates valid Robots Exclusion Protocol files to manage search engine crawlers and block AI scrapers like GPTBot. Generate and download custom rules instantly.