Robotstxt Generator
Generate a robots.txt file with crawl directives for search engine bots. Enter values for instant results with step-by-step formulas.
Formula
User-agent → Disallow/Allow → Crawl-delay → Sitemap
A robots.txt file uses directives to instruct crawlers. User-agent specifies which bot, Disallow blocks paths, Allow overrides within blocked directories, Crawl-delay sets request intervals, and Sitemap points to your XML sitemap.
Worked Examples
Example 1: Standard Business Website
Problem: Generate a robots.txt for a business site that blocks admin, login, and staging areas while providing the sitemap location.
Solution: User-agent: *\nDisallow: /admin/\nDisallow: /login/\nDisallow: /staging/\nDisallow: /api/\nAllow: /api/public/\n\nSitemap: https://example.com/sitemap.xml
Result: Clean robots.txt with 4 disallow rules, 1 allow override, and sitemap
Example 2: Blog Blocking AI Crawlers
Problem: Create a robots.txt for a blog that allows all search engines but blocks AI training crawlers.
Solution: User-agent: *\nDisallow: /draft/\nDisallow: /preview/\n\nUser-agent: GPTBot\nDisallow: /\n\nUser-agent: Google-Extended\nDisallow: /\n\nUser-agent: CCBot\nDisallow: /\n\nSitemap: https://blog.example.com/sitemap.xml
Result: Search engines can crawl freely; AI training bots are fully blocked
Frequently Asked Questions
How do I interpret the result?
Results are displayed with a label and unit to help you understand the output. Many calculators include a short explanation or classification below the result (for example, a BMI category or risk level). Refer to the worked examples section on this page for real-world context.
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
What formula does Robotstxt Generator use?
The formula used is described in the Formula section on this page. It is based on widely accepted standards in the relevant field. If you need a specific reference or citation, the References section provides links to authoritative sources.
Can I use Robotstxt Generator on a mobile device?
Yes. All calculators on NovaCalculator are fully responsive and work on smartphones, tablets, and desktops. The layout adapts automatically to your screen size.
Can I use the results for professional or academic purposes?
You may use the results for reference and educational purposes. For professional reports, academic papers, or critical decisions, we recommend verifying outputs against peer-reviewed sources or consulting a qualified expert in the relevant field.