DeveloperAPI TesterTest REST APIs directly in your browser. Send HTTP requests, inspect responses, generate code snippets, and save collections — no install required.Open
ConverterScientific CalculatorFull-featured scientific calculator with trigonometry, logarithms, memory functions, and calculation history.Open
ConverterCalorie CalculatorCalculate your daily calorie needs (TDEE) and BMR with macronutrient breakdown for weight loss, maintenance, or gain goals.Open
ConverterUnit ConverterConvert between units of length, weight, temperature, speed, data, time, area, and volume.Open
ConverterBMI CalculatorCalculate your Body Mass Index (BMI) using metric or imperial units with health category indicator.Open
ConverterPercentage CalculatorCalculate percentages easily: find X% of Y, what percent X is of Y, or percentage change.Open
TextTyping Speed TestTest and improve your typing speed with WPM tracking, accuracy measurement, and multiple difficulty levels.Open
ConverterAge CalculatorCalculate your exact age in years, months, days, and find out when your next birthday is.Open
GeneratorColor PickerPick colors with eyedropper, convert between HEX/RGB/HSL/CMYK, generate palettes, and check contrast ratios.Open
GeneratorCountdown TimerSet countdown timers for events and deadlines, with multiple timers, browser notifications, and sound alerts.Open
DeveloperSpeed TestTest your internet connection: ping, jitter, download and upload speeds with a real-time animated gauge, live graph, and local history.Open
DeveloperHTML Color CodesBrowse HTML color codes, convert between HEX/RGB/HSL/CMYK, check contrast ratios, and generate color harmonies.Open
ConverterImage CropperCrop images online with drag-and-drop interface, preset aspect ratios, rotation, flip, and instant download.Open
TextCharacter CounterCount characters, words, sentences, and check social media character limits in real time.Open
ConverterTimezone ConverterConvert date and time between multiple timezones with UTC offset display.Open
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