robots.txt is a plain-text file placed at the root of your website that instructs web crawlers which pages or sections they can or cannot access. It's the first file crawlers read when visiting your site.

Does robots.txt block all crawlers?

No. robots.txt is a convention, not a security measure. Well-behaved crawlers (Googlebot, Bingbot) respect it, but malicious scrapers may ignore it entirely. For true access control, use authentication or IP blocking.

How do I block AI crawlers?

Add specific User-agent groups for AI crawlers like GPTBot, ChatGPT-User, CCBot, and Google-Extended with "Disallow: /" directives. This prevents these bots from crawling your content for AI training.

Where do I place the robots.txt file?

Place it at the root of your domain: https://example.com/robots.txt. It must be accessible at this exact path for crawlers to find and read it.

Can robots.txt improve my SEO?

Indirectly, yes. By blocking crawlers from wasting time on unimportant pages (admin, tags, archives), you concentrate crawl budget on your valuable content. This helps search engines index your most important pages more efficiently.

What is crawl budget?

Crawl budget is the number of pages a search engine will crawl on your site within a given timeframe. Large sites with thousands of pages need to manage crawl budget carefully by blocking低-value pages and focusing crawlers on important content.

Should I block login and admin pages?

Yes. Blocking /admin/, /wp-admin/, /login, and similar paths prevents crawlers from wasting crawl budget on non-public pages and avoids indexing sensitive areas of your site.

Crawler Directive Builder v1.0

Every crawler,ruled by one robots.txt.

Generate a properly formatted robots.txt file. Configure which crawlers can access which paths on your site.

FREE

Starter templates

Crawler rules

Valid syntax

0/7

Free to run

#robots.txt#user agent#disallow#allow directive#crawl delay#sitemap directive#googlebot#bingbot#ai crawlers#gptbot#robots.txt#user agent#disallow#allow directive#crawl delay#sitemap directive#googlebot#bingbot#ai crawlers#gptbot

#crawl budget#crawler access#noindex#blocked paths#admin pages#ccbot#google-extended#chatgpt-user#sitemap reference#crawl directives#crawl budget#crawler access#noindex#blocked paths#admin pages#ccbot#google-extended#chatgpt-user#sitemap reference#crawl directives

Ready to Generate

Enter a URL above to fetch existing robots.txt or generate a new one.

Frequently Asked Questions

Get answers to common questions about using this tool and understanding its metrics.

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Crawl-directive engine

Tell bots exactly
where they may go.

Syntax validation, rule simulation and sitemap cross-checks for robots.txt — the tiny file with site-wide ranking consequences.

Syntax validation

Directive-by-directive parsing against spec — typos and malformed rules flagged with line numbers.

syntaxspeclinesparse

benchmarkline audit

Rule simulation

Test any user-agent plus URL path to see allow / disallow outcomes before deploying.

simulateagentspathsoutcomes

benchmarksimulator

Block-risk scan

Over-broad disallows that starve CSS, JS or entire sections — the accidental de-indexers.

blocksover-broadstarverisk

benchmarkrisk flags

Sitemap cross-check

Sitemap directives verified reachable and consistent with allow rules.

sitemapsreachabilityconsistencydirectives

benchmarkcross-check

Bot coverage

Googlebot, Bingbot, AI crawlers and common SEO tools — who is addressed and who is wildcarded.

GooglebotAI-botswildcardscoverage

benchmarkagent map

Deploy checklist

Fetch-status, propagation and verification steps so edits go live without surprises.

fetchdeployverifylive

benchmarkchecklist

How it works

Master the smallest powerful file.

Twenty lines control your entire crawl budget. Validate them like production code.

Step 01

Enter your domain

The live robots.txt is fetched and parsed against specification.

live fetch

Step 02

Rules decoded

Every allow, disallow and sitemap line explained in plain language.

decoded

Step 03

Risks flagged

Blocking mistakes and bot-coverage gaps ranked by crawl impact.

ranked

Step 04

Deploy safely

Apply fixes behind the checklist and re-fetch to confirm.

confirmed

Robots, decoded

Small file, total authority.

Robots.txt gates crawl budget for the whole domain. Precision here multiplies every other SEO effort.

One typo can de-index you

A misplaced slash or wildcard blocks entire sections. Line-level validation catches what eyes miss.

Spec-conformant parsing
Line-numbered error flags
Before/after diff guidance

Dimension benchmark89/100

most robots disasters are single-character errors

Why Amaris vs. the rest

Capability

Amaris

Generic

Manual

Live fetch with line-level audit

Agent + path simulation

Over-block risk detection

AI-crawler coverage mapping

Free with instant re-fetch

Multi-site fleet management

Audit robots now

Free · Live · No signup

Gate with precision

Control the crawl, control the rankings.

Validate syntax, simulate outcomes, close block risks — and deploy crawler policy with confidence.

Audit robots now Talk to an expert

Free · No signup · Live fetch

Crawler Directives

Understanding how robots.txt controls search engine and AI crawler access.

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