Online Tools & Utilities
Free, fast, and easy-to-use web tools for everyone. Streamline your workflow with our comprehensive suite of 154+ utilities.
🎉 Major Milestone Achieved!
We've reached an incredible milestone with our growing collection of developer tools
From simple text tools to advanced scientific converters, we've got everything you need
Building a Production CLI Tool with Node.js
Master the art of building professional command-line tools. From scaffolding to publishing—learn best practices, testing, and deployment strategies used in production.
- Production-ready patterns
- Testing & deployment
- Real-world examples
Find the Perfect Tool
Search through our collection of tools or browse by category to find exactly what you need
Popular Tools
Most used and highly rated developer utilities
✨ New Tools
12 new toolsSlug Generator
Convert titles and phrases to URL-friendly slugs: lowercase, hyphenate, strip diacritics for URLs, CMS, and SEO
HTTP Status Code Lookup
Look up HTTP status codes by number or name—see meanings, usage, and copy codes instantly
User-Agent Parser
Parse browser, OS, and device from any User-Agent string. Debugging, analytics, and support.
Factorial Calculator
Calculate factorial values (n!) with exact results, digit counts, and reusable history
Exponents Calculator
Calculate powers with negative and fractional exponents plus expanded form guidance
Invoice Generator
Create professional invoices with client details, line items, taxes, discounts, and totals. Perfect for freelancers and small businesses
Profit Margin & Markup Calculator
Calculate gross margin, net margin, and markup from revenue and costs in seconds
Sales Tax & VAT Calculator
Add or remove sales tax/VAT with support for multiple rates to price products accurately
Grocery List
Build a smart grocery list with categories, quantities, and mobile-friendly checkoff
Medication Reminder
Set medication schedules with doses, times, and browser reminders that stay private in your browser
Standard Deviation Calculator
Calculate standard deviation, variance, and other statistical measures from a dataset
Variance Calculator
Calculate variance, standard deviation, and other statistical measures from a dataset
Latest Articles
Read our latest insights on web development, programming tips, and industry best practices.