Online Tools & Utilities
Free, fast, and easy-to-use web tools for everyone. Streamline your workflow with our comprehensive suite of 149+ utilities.
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Popular Tools
Most used and highly rated developer utilities
✨ New Tools
12 new toolsInvoice 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
Density Converter
Convert between density units including kg/m³, lb/ft³, g/cm³, and more. Perfect for physics, chemistry, engineering, and material science calculations
Angle Converter
Convert between angle units including degrees, radians, gradians, and more. Perfect for mathematics, engineering, navigation, and scientific calculations
Power Converter
Convert between power units including watts, kilowatts, horsepower, BTUs per hour, and more. Perfect for electrical engineering, mechanical systems, and power calculations
Energy Converter
Convert between energy units including joules, calories, kilowatt-hours, BTUs, electron volts, and more. Perfect for physics, engineering, chemistry, and everyday calculations
Flow Rate Converter
Convert between flow rate units including L/s, m³/h, gal/min, cfm, and more. Perfect for HVAC, plumbing, chemical engineering, and irrigation applications
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