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Robots.txt Generator

Build a robots.txt with allow/disallow rules and sitemap reference.

Best for: Steering crawlers away from low-value or duplicate paths and pointing them to your sitemap.

Complete guide

Input

How it's calculated & sources
The Robots.txt Generator uses the standard method for this calculation. It runs entirely in your browser, so your inputs are never uploaded. Last reviewed June 2026.

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

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Complete guide

Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is Robots.txt?
A robots.txt generator creates the file that tells search-engine crawlers which parts of your site they may or may not crawl.
Why does Robots.txt matter?
A crawl policy for bots. To truly keep a page out of search, use a noindex tag or authentication — not robots.txt.
How is Robots.txt calculated?
robots.txt lives at your site root and uses User-agent, Disallow, Allow and Sitemap directives. It is a crawling instruction, not an access control: a disallowed page can still appear in search if other sites link to it, and the file is publicly visible.
What are common robots.txt mistakes?
Trying to hide sensitive pages with robots.txt — it is public and not enforced.
When should you use the Robots.txt Generator?
Steering crawlers away from low-value or duplicate paths and pointing them to your sitemap.

What is the Robots.txt Generator?

A robots.txt generator creates the file that tells search-engine crawlers which parts of your site they may or may not crawl.

How the Robots.txt Generator works

robots.txt lives at your site root and uses User-agent, Disallow, Allow and Sitemap directives. It is a crawling instruction, not an access control: a disallowed page can still appear in search if other sites link to it, and the file is publicly visible.

Common mistakes to avoid

  • Trying to hide sensitive pages with robots.txt — it is public and not enforced.
  • Accidentally blocking the whole site with Disallow: / .
  • Confusing blocking crawling with blocking indexing.
  • Placing the file anywhere other than the domain root.

Keywords: robots, seo, crawler.

Sources: Google Search Central — robots.txt

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the Robots.txt Generator free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the Robots.txt Generator?+

Robots.txt Generator uses the standard robots.txt formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The Robots.txt Generator runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Robots.txt Generator on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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Reddit post
Title: I built/used this free robots.txt generator — instant, no signup

Body: Build a robots.txt with allow/disallow rules and sitemap reference. Try it: https://freetoolsgalaxy.com/tools/robots-txt-generator
LinkedIn post
Robots.txt Generator on Free Tools Galaxy — Build a robots.txt with allow/disallow rules and sitemap reference. https://freetoolsgalaxy.com/tools/robots-txt-generator
Medium intro
# Robots.txt Generator — the free tool I keep coming back to

Build a robots.txt with allow/disallow rules and sitemap reference.

Try it: https://freetoolsgalaxy.com/tools/robots-txt-generator
Quora answer
The fastest way is to use a free in-browser robots.txt generator: https://freetoolsgalaxy.com/tools/robots-txt-generator. Build a robots.txt with allow/disallow rules and sitemap reference.

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Drop into any site — auto-resizes to its content height, theme-aware.
<iframe src="https://freetoolsgalaxy.com/tools/robots-txt-generator?embed=1" title="Robots.txt Generator" loading="lazy"
  style="width:100%;height:600px;border:0;border-radius:16px;background:#0b1020"
  allow="clipboard-write"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="ftg-embed-height"){document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source){f.style.height=e.data.height+"px";}});}});</script>
<p><a href="https://freetoolsgalaxy.com/tools/robots-txt-generator" target="_blank" rel="noopener">Powered by Robots.txt Generator on Free Tools Galaxy</a></p>
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<div style="position:relative;padding-bottom:75%;height:0;overflow:hidden;border-radius:16px">
  <iframe src="https://freetoolsgalaxy.com/tools/robots-txt-generator?embed=1" title="Robots.txt Generator" loading="lazy"
    style="position:absolute;inset:0;width:100%;height:100%;border:0" allow="clipboard-write"></iframe>
</div>
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Paste in a custom-HTML block or markdown file.
[Robots.txt Generator — free online tool](https://freetoolsgalaxy.com/tools/robots-txt-generator)

<iframe src="https://freetoolsgalaxy.com/tools/robots-txt-generator?embed=1" width="100%" height="600" frameborder="0"></iframe>
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<a href="https://freetoolsgalaxy.com/tools/robots-txt-generator" target="_blank" rel="noopener">Try the free Robots.txt Generator</a>

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Title
I built a free fraction calculator that works instantly in the browser — no signup, no ads in your face
Body
Hey r/[subreddit],

I kept needing a quick fraction calculator and most options online were slow or behind paywalls, so I built one that:

• Runs 100% in your browser (your data never leaves your device)
• No signup, no email wall, no popups
• Loads in under a second on mobile

It covers the standard fraction use cases (fraction, math) and links out to the formula + worked examples if you want to learn the math.

Link: https://freetoolsgalaxy.com/tools/fraction-calculator

Happy to take feedback — what's missing?
Post to a relevant subreddit (e.g. r/InternetIsBeautiful, r/webdev, r/productivity). Avoid spammy subs.
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