Rext AI

Robots.txt Generator

One misconfigured line in this file can hide your entire site from Google. Get it right in under a minute with Rext AI.

Configure Rules

Generated robots.txt

User-agent: *
Allow: /

Robots.txt Best Practices

  • •Place robots.txt in your website's root directory
  • •Use "User-agent: *" to apply rules to all bots
  • •Always include your sitemap URL
  • •Test your robots.txt file before deploying

What Is a Robots.txt Generator?

A robots.txt file is a plain text file that lives at the root of your website, yoursite.com/robots.txt, and tells search engine crawlers and other automated bots which parts of your site they're allowed to access and which parts to leave alone. 

The robots.txt file sits quietly in your site's root directory, and most people never think about it until something's gone wrong, a staging site accidentally got indexed, or worse, an accidental "Disallow: /" blocked the whole site from search engines.

Rext AI's robots.txt generator builds a clean, correctly formatted file based on your actual crawling preferences, so you're not hand-writing syntax you only half-remember.

Writing one by hand isn't technically difficult, but it's easy to get subtly wrong. A stray forward slash, a rule applied to the wrong user-agent, or a "Disallow: /" left over from a staging environment can quietly deindex pages, or your entire site, without any obvious error message telling you it happened. This file has no undo button once search engines have already acted on it; you just see a slow, confusing drop in your indexed pages a few weeks later.

A robots.txt generator removes that risk by building the file from a structured set of choices instead of raw syntax. You decide which directories to block, which bots (if any) get special treatment, and whether to point crawlers toward your sitemap, and the tool assembles that into a correctly formatted file. It's a small file, but getting it wrong is one of the more avoidable, self-inflicted SEO mistakes a site can make.

How to Use the Robots.txt Generator

  1. Set your default rule. Most sites should start with "Allow all" and then selectively block specific directories, rather than starting from "Disallow all" and trying to remember to open everything back up.
  2. Add your sitemap URL. This isn't required, but including it helps crawlers discover your full site structure faster and more reliably than relying on internal links alone.
  3. List the paths you want blocked, one per line, typically admin panels, checkout or cart pages, internal search result pages, and staging or duplicate content directories.
  4. Set per-bot rules if needed. You might allow Googlebot and Bingbot full access while blocking specific AI crawlers, or vice versa, depending on your site's goals.
  5. Add a crawl delay only if you have a specific reason to. Most sites don't need one, and setting it unnecessarily can slow down how quickly new content gets discovered and indexed.
  6. Generate and review the output. Check the summary to confirm the rules match what you actually intended; this is the step where a misplaced rule gets caught before it goes live.
  7. Download the file and upload it to your site's root directory, then verify it's live by visiting yoursite.com/robots.txt directly in a browser.
  8. Test it in Google Search Console's robots.txt tester to confirm Google is reading the rules the way you expect.

Robots.txt Generator Examples

Example 1 — Standard blog

User-agent: *

Disallow: /wp-admin/

Disallow: /search/

Sitemap: https://yourblog.com/sitemap.xml

Example 2 — E-commerce site blocking checkout and cart pages

User-agent: *

Disallow: /cart/

Disallow: /checkout/

Disallow: /my-account/

Allow: /

Sitemap: https://yourstore.com/sitemap.xml

Example 3 — Site blocking specific AI crawlers while allowing search engines

User-agent: Googlebot

Allow: /

User-agent: GPTBot

Disallow: /

User-agent: *

Allow: /

Sitemap: https://yoursite.com/sitemap.xml



Key Features & Capabilities

  • Per-bot rule configuration: set different access levels for Googlebot, Bingbot, AI crawlers like GPTBot and ClaudeBot, and any custom user-agent.
  • Sitemap integration: add your sitemap URL directly into the generated file.
  • Syntax validation: catches conflicting or malformed rules before you download the file.
  • Crawl delay support: optionally throttle crawler request frequency for sites with server load concerns.
  • Live preview: see exactly how the file will read once it's uploaded.
  • One-click download: get a ready-to-upload robots.txt file, correctly named and formatted.
  • No coding required: build the file through form fields instead of writing raw syntax from scratch.

FAQ:

What happens if my site doesn't have a robots.txt file at all?

Search engines will generally still crawl and index your site normally; the absence of a robots.txt file is treated as "no specific restrictions," not as a block. That said, having one gives you deliberate control instead of leaving crawling behavior entirely up to default bot behavior.

Can robots.txt actually keep a page out of Google's index?

It's commonly misunderstood, but robots.txt controls crawling, not indexing directly. A page blocked in robots.txt can still occasionally appear in search results (often with no description) if other sites link to it. To reliably keep a page out of the index, use a noindex meta tag on the page itself, not just a robots.txt disallow rule.

Where exactly do I upload the robots.txt file?

It needs to sit at the root of your domain: yoursite.com/robots.txt,  not inside a subfolder. Most CMS platforms and hosting dashboards have a specific place to upload or edit this file; check your platform's documentation if you're not sure where that is.

Should I block AI crawlers like GPTBot from my site?

That depends entirely on your own position on AI training data using your content. Some site owners block them to prevent their content from training AI models; others allow them for visibility in AI-generated answers. There's no universally correct choice here; it's a decision worth making deliberately rather than by default.

Can one wrong line in robots.txt really block my entire site from search engines?

Yes, and it's one of the more common self-inflicted SEO mistakes. A rule like "Disallow: /" under "User-agent: *" tells every crawler to stay away from your entire site. This sometimes gets left in accidentally after moving a staging site to production. Always verify the live file after uploading.

Related tools:

Ready to Take Control of Your Crawlers?

A correct robots.txt gets you crawled, but with the help of great content, you rank. Rext AI handles both; start with a clean, validated robots.txt file, then use the same platform to plan, write, and optimize content built for search and AI visibility.