Free Online Tools

Convert Markdown to HTML instantly with live preview. Free online tool for developers, bloggers, and writers.

Generate secure, random passwords with customizable length and character options. Free online password generator with strength meter.

Calculate your Body Mass Index (BMI) instantly. Free online BMI calculator with health categories and weight status.

Calculate your Basal Metabolic Rate (BMR) and daily calorie needs instantly. Free online BMR calculator with TDEE and macronutrient breakdown.

Calculate your body fat percentage instantly using the US Navy method. Free online body fat calculator with lean mass and health category analysis.

Calculate percentages instantly. Free online percentage calculator for discounts, tips, taxes, scores, and more.

Calculate your exact age from birthdate instantly. Free online age calculator with years, months, days and detailed statistics.

Convert colors between HEX, RGB, and HSL formats instantly. Free online color converter for designers and developers.

Convert units instantly - length, weight, temperature, volume, area, speed, and more. Free online unit converter for everyday use.

Generate custom QR codes instantly for URLs, text, WiFi, emails, and more. Free online QR code creator with download option.

Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) instantly. Free online hash generator for developers and security professionals.

Format, validate, and minify JSON instantly. Free online JSON tool for developers with syntax highlighting and error detection.

Generate UUIDs (v1, v3, v4, v5) and validate UUID formats. Free online UUID generator for developers with batch generation.

Convert time between time zones instantly. Free online world clock and time zone converter for global meetings and travel planning.

Count words, characters, paragraphs, and sentences in real-time. Perfect for writers, students, and content creators.

Calculate your daily calorie needs, TDEE (Total Daily Energy Expenditure), and macronutrient breakdown. Free online calorie calculator for fitness and weight management.

Encode or decode Base64 data instantly. Free online Base64 converter for developers with URL-safe and line-wrap options.

Calculate loan payments, mortgage installments, and total interest instantly. Free online loan calculator with amortization schedule and extra payment analysis.

Convert text between UPPER, lower, Title, Camel, snake, kebab and more cases instantly. Free online text case converter for developers and writers.

Calculate days between dates, add/subtract days from a date, and find exact date differences. Free online date calculator.

Calculate restaurant tips and split bills instantly. Free online tip calculator with customizable tip percentages and bill splitting.

Calculate your daily water intake needs based on weight, activity level, and conditions. Free online hydration calculator with personalized recommendations.

Calculate discounts and final prices instantly. Free online discount calculator with percentage off, amount off, and multiple discount options.

Calculate inflation and purchasing power changes over time. Convert dollar amounts between different years using CPI data. Free online inflation calculator.

Calculate your baby's due date instantly from your last period date. Free online pregnancy calculator with trimester info, milestones, and pregnancy week tracker.

Calculate your fertile window and ovulation date instantly. Free online ovulation calculator to help plan pregnancy with accurate fertile days prediction.

Calculate cryptocurrency investment profits and losses with buy/sell prices, fees, and ROI analysis. Free online crypto profit calculator.

Convert currency between USD, EUR, KRW, JPY, GBP and more. Free online exchange rate calculator with real-time rates.

Calculate aspect ratios instantly for videos, images, and screens. Free online ratio calculator with common presets and scaling dimensions.

Calculate your GPA (Grade Point Average) instantly. Free online GPA calculator with letter grade and percentage options for students.

Free online stopwatch with millisecond precision, lap function, and pause/resume capabilities. Perfect for timing workouts, cooking, and more.

Calculate sales tax and final price instantly. Free online sales tax calculator with US state tax rates and custom tax options.

Calculate your one rep max (1RM) instantly. Free online 1RM calculator for weightlifting, powerlifting, and strength training with Epley and Brzycki formulas.

Generate random numbers instantly with customizable range, quantity, and options. Free online RNG generator for lottery, giveaways, and random selection.

Calculate your target heart rate zone for exercise instantly. Free online heart rate calculator using Karvonen method with fitness level adjustments.

Calculate optimal sleep and wake times based on 90-minute sleep cycles. Free online sleep calculator for better rest and energy.

Calculate your dog's age in human years instantly. Free online dog age converter with breed size considerations and health insights.

Calculate your ideal body weight instantly using the Devine formula. Free online ideal weight calculator with BMI analysis and health recommendations.

Calculate your Blood Alcohol Content (BAC) instantly. Free online BAC calculator to estimate alcohol levels in your system based on drinks, weight, and time.

Plan your retirement with our free online retirement calculator. Calculate how much you need to save, when you can retire, and your retirement income needs.

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