One stray slash in a crawl file can pull a whole site out of Google. I have watched it happen to a client after a developer pasted a staging config straight into production, and organic traffic flatlined for weeks before anyone noticed. That is the quiet danger of this little text file, and it is exactly why a robots.txt generator exists. You fill in a few fields, the tool writes the syntax for you, and the silly mistakes that de-index sites never get the chance to happen.
The SnapZain robots.txt generator lets you pick a user-agent, list the paths you want blocked, allow back the folders you still need to crawl, drop in your sitemap, and walk away with a ready file. No memorising directives. No guessing whether a trailing slash matters (it does). Below you will find how to use it, what each setting means, and the AI-crawler rules most older guides skip entirely.
What Does a Robots.txt File Do?
A robots.txt file tells web crawlers which parts of your site they may and may not visit. It sits at your domain root, runs on the Robots Exclusion Protocol (RFC 9309), and cooperative bots like Googlebot read it before crawling. It controls crawling, not indexing.
That last distinction trips up most people, so it helps to see exactly what this file handles and what it does not:
- It guides crawlers, it does not enforce. The file is a polite request. Googlebot and Bingbot obey it, but aggressive scrapers can ignore it entirely.
- It lives at one fixed address: Crawlers only check https://yoursite.com/robots.txt. Place the file in any subfolder and bots will never find it.
- It manages crawl budgets: Steering bots away from admin screens, internal search results, and cart pages leaves more crawl effort for the pages you want ranked.
- It does not hide pages from search: A blocked URL can still appear in results if another site links to it, so use a noindex tag or password protection for anything truly private.
- It is publicly visible: Anyone can read your file, which is why listing a sensitive folder here just advertises its location.
How To Use the SnapZain Robots.txt Generator?
The form is built so a first-timer and a seasoned SEO get the same clean output. Work through it top to bottom:
- Choose Your User-Agent: Open the dropdown and select the crawler your rules apply to. Leave it on * (all bots) to cover every crawler at once, or name a specific one like Googlebot when you want a targeted rule.
- Add Your Disallow Paths: In the Disallow box, type one path per line for anything bots should skip, such as /admin, /api, /private, or /wp-admin. Each line begins with a forward slash. These are the directories crawlers will not access.
- List Allow Paths If You Need Exceptions: Use the optional Allow box to override a disallow for a specific folder, again one path per line. This is how you block a parent directory but still let bots reach /public or a single file inside it.
- Paste Your Main Sitemap URL: Drop the full address of your sitemap, like https://example.com/sitemap.xml, into the Sitemap field so crawlers can find your page list fast.
- Add Extra Sitemaps If You Run More Than One: Larger sites often split content across files. Use the Additional Sitemap URLs box to add each one on its own line, for example a posts sitemap and a pages sitemap.
- Generate, Then Copy or Download: Click Generate robots.txt, review the output, and grab your file.
That last review step matters more than it sounds. Read the file before you upload it. A two-line mistake is the difference between a tidy crawl and an invisible website.
The Directives The Tool Writes For You
Every rule in the file is built from a handful of commands. Knowing them helps you sanity-check what the generator produces.
A couple of quirks worth holding onto. Paths are case-sensitive, so /Photo/ and /photo/ are two different folders to a crawler. And a Disallow line left empty means the opposite of what beginners expect: Disallow: with nothing after it allows everything.
Block AI Crawlers Without Losing Search Traffic
The crawler landscape changed. Alongside Googlebot and Bingbot, your file now meets AI crawlers like GPTBot, ClaudeBot, Google-Extended, and PerplexityBot, and they do not all do the same job.
There are really two kinds. Training crawlers (GPTBot, ClaudeBot, CCBot, Google-Extended) pull content to train language models. Retrieval and search crawlers (OAI-SearchBot, Claude-SearchBot, PerplexityBot) fetch pages in real time to answer a user's question and often cite you back. Blocking the first kind protects your work from model training. Blocking the second kind quietly removes you from AI answers and the referral traffic that comes with them, and AI-referred visitors tend to convert well.
So the balanced setup most content sites want looks like this: block the training scrapers, keep the search crawlers open.
A starting point:
# Block AI training crawlers
User-agent: GPTBot
Disallow: /
User-agent: ClaudeBot
Disallow: /
User-agent: Google-Extended
Disallow: /
User-agent: CCBot
Disallow: /
# Allow AI search and retrieval
User-agent: OAI-SearchBot
Allow: /
User-agent: Claude-SearchBot
Allow: /
User-agent: PerplexityBot
Allow: /
Sitemap: https://example.com/sitemap.xml
Two things to verify. Google-Extended only opts you out of Gemini training; it does not touch your Google Search ranking or AI Overview eligibility. And skip the old Anthropic strings Claude-Web and anthropic-ai, which are deprecated. The live tokens in 2026 are ClaudeBot for training, Claude-SearchBot for the search index, and Claude-User for fetches a person triggers inside Claude.
- A Reality Check: this file is a polite request. Cooperative bots obey it. Aggressive scrapers ignore it and need server-side blocking or a firewall instead.
Platform Notes: WordPress, Blogger, and the Rest
WordPress serves a virtual robots.txt by default, so visiting yoursite.com/robots.txt shows a file even when none exists on the server. The moment you upload a real one to the root (usually public_html), it replaces that virtual version. A safe WordPress baseline blocks /wp-admin/ while keeping admin-ajax.php open, then points to your sitemap index. One trap to check first: under Settings to Reading, an enabled "Discourage search engines" box quietly blocks your whole site, and no generated file will override it.
Blogger and other hosted platforms handle this differently. Many expose a custom robots.txt setting in their dashboard rather than letting you upload a file by FTP, which is why "custom robots.txt generator for Blogger" is such a common search. The output from this tool drops straight into those settings fields.
Once your file is live, confirm it. Open yoursite.com/robots.txt in a browser to see the real file, then run it through the robots.txt report in Google Search Console to catch anything blocking pages you meant to keep.
Related Tools That You Might Need Further
A crawl file and a sitemap are two halves of the same job: one tells bots where not to go, the other shows them everything worth finding.
- After you generate this file, building or refreshing your page list with the XML sitemap generator gives crawlers the complete picture.
- From there, tighten your on-page signals with the meta tag generator.
- Check the whole setup through a quick SEO audit rounds out a technical foundation that holds up under both classic search and AI answer engines.
Frequently Asked Questions
Is The SnapZain Robots.txt Generator Free?
Yes, it is completely free with no sign-up. Configure your user-agent, disallow and allow paths, and sitemap, then copy or download the finished file as many times as you need.
Where Do I Put the Robots.txt File After Generating It?
Upload it to the root directory of your domain so it loads at yoursite.com/robots.txt. Crawlers only check the root, so a file placed in any subfolder is ignored completely.
Does Blocking a Page in Robots.txt Remove it From Google?
No. Robots.txt stops crawling, not indexing. A blocked page can still appear in results if other sites link to it. Use a noindex tag to keep a page out of search.
Will Blocking AI Crawlers Decrease My Google Rankings?
No. GPTBot, ClaudeBot, and Google-Extended are separate from Googlebot. You can block AI training crawlers without affecting your Google Search visibility or AI Overview eligibility.
Can I Have More Than One Robots.txt File?
No. Each domain origin uses exactly one robots.txt at its root. Subdomains like blog.example.com need their own separate file, but a single domain never has two.