🛠️ pakheritagestore

Robots.txt Generator

Create professional robots.txt files to control search engine crawling and indexing

Basic Settings

Used for sitemap URL generation

Delay between requests (0 = no delay)

User Agents

Crawling Rules

One path per line (leave empty to allow all)

One path per line

Sitemaps

One sitemap URL per line

Quick Presets

Generated Robots.txt

Installation Instructions

1. Save the File

Save the generated content as robots.txt

2. Upload to Root Directory

Place the file in your website's root directory (same level as index.html)

3. Test Access

Verify it's accessible at yoursite.com/robots.txt

4. Submit to Search Console

Test and submit your robots.txt in Google Search Console

Features

  • 🤖 Support for all major search engine bots
  • ⚙️ Customizable crawl delay settings
  • 📁 Flexible allow/disallow path rules
  • 🗺️ Automatic sitemap integration
  • 📋 Copy and download functionality
  • ✅ Built-in validation and error checking
  • 🎯 Ready-to-use presets for common scenarios

Use Cases

  • 🌐 Website SEO optimization
  • 🔒 Protect private content from indexing
  • ⚡ Control server load from web crawlers
  • 📊 Guide search engines to important content
  • 🛡️ Block malicious or unwanted bots
  • 🎯 Optimize crawl budget allocation
  • 📱 Mobile and desktop site management

Example algorithm (days)

// Using date objects in most languages:
days = (date2 - date1).days
Example: Days between 2025-01-01 and 2025-03-01 = 59 days (non-leap year).

6. Days Until

What it does: "Days Until" calculates how many days remain until a target date (a birthday, holiday, event). It is essentially a date-difference from today to a future date but often presented with friendly copy and optional recurrence handling for yearly events.

Features

Example: Today is 2025-09-24 — Days until 2025-12-25 (Christmas) = 92 days.

Putting it all together — Building reliable web calculators

Here are practical tips for developers and product managers building these tools on websites and mobile apps:

Sample HTML form (simplified)

<form id="percentage-form">
<label>Base: <input name="base" type="number" step="any" /></label>
<label>Percentage: <input name="percent" type="number" step="any" /></label>
<button type="submit">Calculate</button>
</form>

Attach client-side JS to compute results instantly and show them inside an accessible result container.

Design & SEO considerations

These calculator pages are highly searchable. Follow these quick SEO tips:

Conclusion

Age, Percentage, Loan, BMI, Date Difference, and Days Until calculators are simple but powerful tools that deliver immediate value. When implemented carefully — with correct formulas, clear UX, accessibility, and privacy considerations — they can significantly improve user engagement and trust. Developers should prefer reliable libraries for date and numeric handling, clearly document assumptions, and provide helpful explanations so users can understand and act on their results.

If you’d like, I can also provide ready-to-use JavaScript snippets for any of the calculators above (for example, a full amortization table script for the Loan Calculator or a BMI widget with unit toggles). Tell me which one you want first and I’ll include a copy-pasteable implementation.

Written as a detailed guide for developers and product teams building small utility calculators for web and mobile. Updated: 2025-09-24.