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65 toolsJSON & Data
2 toolsText
2 toolsEncoding & Security
3 toolsWriting & Design
3 toolsDeveloper Tools
4 toolsRegex Tester
Validate expressions, switch flags, and highlight every match visually.
Hash Generator
Create MD5, SHA-1, or SHA-256 hashes from UTF-8 text strings.
QR Code Generator
Turn URLs or text into crisp, downloadable QR code PNG images.
SQL Formatter & Minifier
Format or minify SQL with dialect-aware keyword and indentation controls.
Security & IDs
2 toolsFinance
5 toolsCompound Interest Calculator
Project investment growth with flexible compounding and contributions.
Simple Interest Calculator
Calculate interest and total value from principal, rate, and time.
Credit Card Payoff Calculator
Estimate payoff time, total interest, and annual card balances.
Debt-to-Income Ratio Calculator
Compare required monthly debt payments with gross monthly income.
Loan Calculator
Estimate fixed payments, interest, payoff time, and amortization.
Health & Fitness
5 toolsBMI Calculator
Calculate adult BMI, screening category, and healthy-weight range.
BMR / Calorie Needs Calculator
Estimate basal metabolic rate and daily maintenance calories.
Body Fat Percentage Calculator
Estimate body fat with the Navy circumference method.
Heart Rate Zone Calculator
Calculate five training zones with two heart-rate methods.
Running Pace Calculator
Calculate pace per mile, pace per kilometer, and running speed.
Design
2 toolsConverters
7 toolsUnit Converter
Convert length, weight, temperature, area, volume, speed, and time.
Volume Converter
Convert kitchen and everyday volume units with an at-a-glance comparison.
Weight Converter
Convert metric and customary weight or mass units instantly.
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin with clear comparisons.
Fuel Economy Converter
Convert US MPG, Imperial MPG, km/L, and L/100 km.
Data Storage Converter
Convert bits, bytes, decimal units, and binary IEC units.
Pressure Converter
Convert psi, pascals, bar, atmospheres, and mmHg.
Images & Files
2 toolsCalculators
1 toolDate & Time
5 toolsDate Difference & Age Calculator
Measure exact age, elapsed calendar time, total days, and business days.
Time Zone Converter & World Clock
Convert local times across zones and compare live world clocks.
Time Duration & Hours Calculator
Find elapsed clock time, subtract breaks, and show decimal hours.
Time Card Calculator
Total a weekly time card with breaks, overtime, overnight shifts, and optional pay.
Countdown Timer & Stopwatch
Run an accurate browser countdown or stopwatch with laps.
Shopping & Money
8 toolsTip Calculator & Bill Splitter
Calculate a tip, total bill, and equal amount per person.
Discount & Final Price Calculator
Find sale savings, stacked discounts, tax, and final price.
Sales Tax Calculator
Add sales tax to a price or remove tax from an inclusive total.
Unit Price Comparison Calculator
Compare package prices and identify the lower cost per unit.
Hourly Wage ↔ Salary Calculator
Convert hourly, weekly, biweekly, monthly, and annual gross pay.
Markup & Margin Calculator
Calculate gross profit, markup on cost, and margin on sales.
Fuel Cost & Trip Calculator
Estimate trip fuel, total cost, and cost per passenger.
Mortgage Payment Calculator
Estimate monthly principal, interest, tax, insurance, and HOA.
Math & Education
10 toolsFraction Calculator
Add, subtract, multiply, or divide fractions and mixed numbers.
Mean, Median, Mode & Range Calculator
Summarize a number list with common descriptive statistics.
Ratio & Proportion Calculator
Simplify a ratio and solve the missing value in a proportion.
LCM & GCF Calculator
Find least common multiple, greatest common factor, and prime factors.
Standard Deviation & Variance Calculator
Calculate population or sample variance and standard deviation.
GPA Calculator
Calculate a credit-weighted grade point average for multiple courses.
Grade & Final Exam Calculator
Find the final-exam score needed for a target course grade.
Random Number Generator
Generate secure random integers with optional unique values.
Roman Numeral Converter
Convert standard Roman numerals and decimal numbers both ways.
Binary / Decimal / Hex Converter
Convert integers among binary, octal, decimal, and hexadecimal.
Home & Cooking
4 toolsSquare Footage Calculator
Find area for rectangles, triangles, or circles in common units.
Paint Calculator
Estimate wall area and gallons needed for a room.
Tile & Flooring Calculator
Estimate floor area, tiles, full boxes, waste, and material cost.
Recipe Scaler
Scale ingredient quantities to a different number of servings.