Robots.txt Generator
Robots.txt Generator always starts with User-agent: *. A nonempty Disallow field is inserted verbatim as one Disallow line; otherwise it emits Allow: /. An optional Sitemap value is also inserted verbatim. The tool does not validate paths or absolute sitemap URLs, escape line breaks, support multiple groups/rules, test crawler-specific interpretation, publish the file, or protect content from access or indexing.
Runs locally — files stay on your deviceCan robots.txt keep confidential pages private?
No. It is a crawl-control convention, not authentication.
Crawl control differs from indexing and access
Compliant crawlers may avoid disallowed paths, but URLs can still be known or indexed from other signals and malicious clients can ignore the file.
How it works
Three fixed lines are composed from wildcard agent, one rule, and optional sitemap text, then blank trailing content is trimmed.
Key concepts
Verbatim fields
No path or newline validation is performed.
Root location matters
A deployed robots.txt normally belongs at the origin root.
When to use it
- Draft a minimal wildcard rule.
- Add one sitemap declaration.
- Create a starting point for manual review.
When not to use it
- Do not block secrets.
- Do not expect a disallowed page's meta noindex to be read.
- Do not use unreviewed line breaks or crawler-specific syntax.
Worked examples
Block area
- Input
Disallow /private/- Expected output
One wildcard rule
This does not require login.
Blank rule
- Input
No Disallow- Expected output
Allow: /
The fallback is explicit allowance.
Sitemap
- Input
Absolute sitemap URL- Expected output
Sitemap line
The URL is not checked.
Common mistakes
Publishing private paths
The file itself can advertise them. Correction: Use authorization.
Blocking noindex
Crawler cannot see the tag. Correction: Coordinate crawling and removal.
Assuming syntax validity
Fields are inserted raw. Correction: Validate final file.
Best practices
- Keep rules minimal and reviewed.
- Use absolute sitemap URLs.
- Test the deployed root file with crawler tooling.
Related operations and differences
Canonical Tag Generator
Choose Canonical Tag Generator when you need to generate a canonical link element from a URL.; use Robots.txt Generator specifically for robots txt.
HTML Link Extractor
Choose HTML Link Extractor when you need to extract href values from pasted HTML.; use Robots.txt Generator specifically for robots txt.
Internal Link Extractor
Choose Internal Link Extractor when you need to extract relative and same-host links.; use Robots.txt Generator specifically for robots txt.
Meta Tag Generator
Choose Meta Tag Generator when you need to generate title and description HTML tags.; use Robots.txt Generator specifically for robots txt.
SERP Snippet Preview
Choose SERP Snippet Preview when you need to preview title, URL and description as text.; use Robots.txt Generator specifically for robots txt.
Sitemap XML Generator
Choose Sitemap XML Generator when you need to create a simple sitemap from a URL list.; use Robots.txt Generator specifically for robots txt.
Limitations and privacy
- One wildcard group and one rule only.
- No validation, newline defense, multiple agents, crawl test, indexing control, deployment, or security.
The pasted text or URL is processed locally in this browser and is not fetched or submitted by the tool.
Frequently asked questions
Does blank Disallow block everything?
No; this generator outputs Allow: /.
Is Sitemap validated?
No.
Does it create the server file?
No.
Can bots ignore it?
Noncompliant clients can.