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A growing collection of free tools for developers, designers, and everyday tasks. No signup, open and use instantly — your data never leaves your device.
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Languages
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Kilometers to Miles ConverterUnit ConverterKilograms to Pounds ConverterUnit ConverterCelsius to Fahrenheit ConverterUnit ConverterCentimeters to Inches ConverterUnit ConverterMB to GB ConverterUnit ConverterCurrency ConverterUnit ConverterRing Size ConverterUnit ConverterDays Between Dates CalculatorCalculator
200+
Online tools
5
Languages
100%
Browser-only
Popular tools
Most used tools, ready to use instantly in your browser.
Unit ConverterCalculatorCalculatorUtilityPDFTextTextCalculatorImageCalculatorUnit ConverterUnit Converter
Kilometers to Miles Converter
Split Bill Calculator
Loan Calculator
Pomodoro Timer
PDF Merge
Word Counter
excel to csv Converter
GPA Calculator
Pinterest Image Size
Running Pace Calculator
Kilograms to Pounds Converter
Celsius to Fahrenheit Converter
Browse by category
Unit Converter
Convert length, weight, temperature, data size, and more using standard factors. Essential for travel, engineering, cooking, and international specs.
Calculator
Financial, health, and everyday math calculators with explained formulas and metrics so you can interpret results with confidence.
Days Between Dates CalculatorCalculatorPercentage CalculatorCalculatorAge CalculatorCalculatorTip CalculatorCalculatorBMI CalculatorCalculatorDiscount CalculatorCalculatorMortgage CalculatorCalculatorCompound Interest CalculatorCalculatorSplit Bill CalculatorCalculatorLoan CalculatorCalculatorCalorie CalculatorCalculatorSleep Cycle CalculatorCalculatorFuel Cost CalculatorCalculatorUnit Price CompareCalculatorRecipe ScalerCalculatorSalary to HourlyCalculatorWater Intake CalculatorCalculatorIdeal Weight CalculatorCalculatorDate Add SubtractCalculatorSales Tax CalculatorCalculatorProfit Margin CalculatorCalculatorMarkup CalculatorCalculatorRetirement CalculatorCalculatorInflation CalculatorCalculatorDue Date CalculatorCalculatorOvulation CalculatorCalculatorBusiness Days CalculatorCalculatorVAT CalculatorCalculatorMeeting Cost CalculatorCalculatorWork Hours CalculatorCalculatorTimesheet CalculatorCalculatorBreak Even CalculatorCalculatorGPA CalculatorCalculatorGrade CalculatorCalculatorQuadratic Equation SolverCalculatorFraction CalculatorCalculatorAspect Ratio CalculatorCalculatorDPI CalculatorCalculatorPassport Photo SizeCalculatorPrint Size CalculatorCalculatorRunning Pace CalculatorCalculatorEV Charging CostCalculatorExposure CalculatorCalculatorMacro CalculatorCalculatorFreelance Rate CalculatorCalculatorKnitting Gauge CalculatorCalculatorConcrete Volume CalculatorCalculatorScientific Notation ConverterCalculatorSignificant Figures CalculatorCalculator
Days Between Dates CalculatorCalculator
Percentage CalculatorCalculator
Age CalculatorCalculator
Tip CalculatorCalculator
BMI CalculatorCalculator
Discount CalculatorCalculator
Mortgage CalculatorCalculator
Compound Interest CalculatorCalculator
Split Bill CalculatorCalculator
Loan CalculatorCalculator
Calorie CalculatorCalculator
Sleep Cycle CalculatorCalculator
Fuel Cost CalculatorCalculator
Unit Price CompareCalculator
Recipe ScalerCalculator
Salary to HourlyCalculator
Water Intake CalculatorCalculator
Ideal Weight CalculatorCalculator
Date Add SubtractCalculator
Sales Tax CalculatorCalculator
Profit Margin CalculatorCalculator
Markup CalculatorCalculator
Retirement CalculatorCalculator
Inflation CalculatorCalculator
Due Date CalculatorCalculator
Ovulation CalculatorCalculator
Business Days CalculatorCalculator
VAT CalculatorCalculator
Meeting Cost CalculatorCalculator
Work Hours CalculatorCalculator
Timesheet CalculatorCalculator
Break Even CalculatorCalculator
GPA CalculatorCalculator
Grade CalculatorCalculator
Quadratic Equation SolverCalculator
Fraction CalculatorCalculator
Aspect Ratio CalculatorCalculator
DPI CalculatorCalculator
Passport Photo SizeCalculator
Print Size CalculatorCalculator
Running Pace CalculatorCalculator
EV Charging CostCalculator
Exposure CalculatorCalculator
Macro CalculatorCalculator
Freelance Rate CalculatorCalculator
Knitting Gauge CalculatorCalculator
Concrete Volume CalculatorCalculator
Scientific Notation ConverterCalculator
Significant Figures CalculatorCalculator
Text
Count, convert, diff, sort, and transform plain text—including CJK scripts, case styles, and reading-time estimates.
Character CounterTextCase ConverterTextWord CounterTextFind and ReplaceTextText DiffTextLorem Ipsum GeneratorTextRemove Duplicate LinesTexttext to speech ConverterTextRemove Blank LinesTextSort Text LinesTextMarkdown PreviewTextReading Time CalculatorTexttable to markdown ConverterTextexcel to csv ConverterTextEmail ExtractorTextWhitespace NormalizerTextLine CounterTextChecklist GeneratorTextFlashcard MakerTextCitation FormatterTextRoman Numeral ConverterTextURL Slug GeneratorText
Character CounterText
Case ConverterText
Word CounterText
Find and ReplaceText
Text DiffText
Lorem Ipsum GeneratorText
Remove Duplicate LinesText
text to speech ConverterText
Remove Blank LinesText
Sort Text LinesText
Markdown PreviewText
Reading Time CalculatorText
table to markdown ConverterText
excel to csv ConverterText
Email ExtractorText
Whitespace NormalizerText
Line CounterText
Checklist GeneratorText
Flashcard MakerText
Citation FormatterText
Roman Numeral ConverterText
URL Slug GeneratorText
5 more tools coming soon
Merge, split, rotate, and compress PDF documents locally. Page structure and compression concepts explained on each tool page.
Image
Resize, compress, crop, convert formats, and strip metadata from images without uploading files to a server.
Instagram Image SizeImageYouTube Thumbnail SizeImagepng to jpg ConverterImageQR Code GeneratorImagePlaceholder Image GeneratorImageBarcode GeneratorImageImage ResizeImageWebP ConverterImageimage to base64 ConverterImagejpg to png ConverterImagebase64 to image ConverterImageImage CompressImageFavicon GeneratorImageImage CropImageRemove EXIF DataImageSignature MakerImagePinterest Image SizeImageTikTok Video SizeImageLinkedIn Banner SizeImageFacebook Cover SizeImageTwitter Header SizeImage
Instagram Image SizeImage
YouTube Thumbnail SizeImage
png to jpg ConverterImage
QR Code GeneratorImage
Placeholder Image GeneratorImage
Barcode GeneratorImage
Image ResizeImage
WebP ConverterImage
image to base64 ConverterImage
jpg to png ConverterImage
base64 to image ConverterImage
Image CompressImage
Favicon GeneratorImage
Image CropImage
Remove EXIF DataImage
Signature MakerImage
Pinterest Image SizeImage
TikTok Video SizeImage
LinkedIn Banner SizeImage
Facebook Cover SizeImage
Twitter Header SizeImage
Generator
Generate UUIDs, passwords, QR codes, placeholder text, and random data for testing, prototyping, and production IDs.
Utility
Focused single-purpose utilities for quick tasks that do not fit other categories—fast, free, and private.
Time Zone ConverterUtility
World ClockUtility
Countdown TimerUtility
Pomodoro TimerUtility
Stopwatch TimerUtility
Typing Speed TestUtility
Study TimerUtility
BPM Tap TempoUtility
1 more tools coming soon
Security
Hash, encrypt, and check password strength using client-side cryptography. Algorithm details and standards linked for reference.
Color
Pick colors, convert hex/RGB, check WCAG contrast, and build gradients for accessible, production-ready design.
Developer
Format, validate, decode, and inspect JSON, SQL, JWT, regex, and other developer data—all running locally in your browser.
UUID GeneratorDeveloperJSON FormatterDeveloperUnix Timestamp ConverterDeveloperyaml to json ConverterDevelopercsv to json ConverterDeveloperJSON ValidatorDeveloperjson to csv ConverterDeveloperRegex TesterDeveloperSQL FormatterDeveloperCSS MinifierDeveloperXML FormatterDeveloperJavaScript MinifierDeveloperHTML MinifierDeveloperCron Expression GeneratorDeveloperJSON DiffDevelopercurl to code ConverterDeveloper
UUID GeneratorDeveloper
JSON FormatterDeveloper
Unix Timestamp ConverterDeveloper
yaml to json ConverterDeveloper
csv to json ConverterDeveloper
JSON ValidatorDeveloper
json to csv ConverterDeveloper
Regex TesterDeveloper
SQL FormatterDeveloper
CSS MinifierDeveloper
XML FormatterDeveloper
JavaScript MinifierDeveloper
HTML MinifierDeveloper
Cron Expression GeneratorDeveloper
JSON DiffDeveloper
curl to code ConverterDeveloper
Encoding
Encode and decode Base64, URL, hex, HTML entities, and binary formats. Understand character sets to prevent data corruption across systems.
MD5 Hash GeneratorEncodingSHA-256 Hash GeneratorEncodingURL Encode DecodeEncodingBase64 Encode DecodeEncodingSHA-1 Hash GeneratorEncodingJWT DecoderEncodingHTML Entity Encode DecodeEncodingUnicode ConverterEncodingNumber Base ConverterEncodinghex to text ConverterEncodingbinary to text ConverterEncodingAES Encrypt DecryptEncoding
MD5 Hash GeneratorEncoding
SHA-256 Hash GeneratorEncoding
URL Encode DecodeEncoding
Base64 Encode DecodeEncoding
SHA-1 Hash GeneratorEncoding
JWT DecoderEncoding
HTML Entity Encode DecodeEncoding
Unicode ConverterEncoding
Number Base ConverterEncoding
hex to text ConverterEncoding
binary to text ConverterEncoding
AES Encrypt DecryptEncoding
SEO
Build UTM links, preview Open Graph cards, validate meta descriptions, and generate robots.txt for search and social visibility.
Network
Inspect IPs, time zones, world clocks, and user-agent strings—common fields in logs, analytics, and debugging.
Unit conversion matrix
Convert length, weight, temperature, data size, and more using standard factors. Essential for travel, engineering, cooking, and international specs.
Miles to Kilometers ConverterUnit ConverterInches to Centimeters ConverterUnit ConverterPounds to Kilograms ConverterUnit ConverterFahrenheit to Celsius ConverterUnit ConverterGB to MB ConverterUnit ConverterFeet to Meters ConverterUnit ConverterMeters to Feet ConverterUnit ConverterMillimeters to Inches ConverterUnit ConverterFeet to Inches ConverterUnit ConverterHours to Minutes ConverterUnit ConverterMeters to Centimeters ConverterUnit ConverterOunces to Grams ConverterUnit ConverterLiters to Gallons ConverterUnit ConverterGallons to Liters ConverterUnit ConverterMPH to KMH ConverterUnit ConverterKMH to MPH ConverterUnit ConverterStone to Kilograms ConverterUnit ConverterKilograms to Stone ConverterUnit ConverterCups to Milliliters ConverterUnit ConverterMilliliters to Cups ConverterUnit ConverterFluid Ounces to Milliliters ConverterUnit ConverterAcres to Hectares ConverterUnit ConverterHectares to Acres ConverterUnit ConverterSquare Feet to Square Meters ConverterUnit ConverterSquare Meters to Square Feet ConverterUnit ConverterPSI to Bar ConverterUnit ConverterBar to PSI ConverterUnit ConverterKnots to MPH ConverterUnit ConverterYards to Meters ConverterUnit ConverterMeters to Yards ConverterUnit ConverterHorsepower to Kilowatts ConverterUnit ConverterKilowatts to Horsepower ConverterUnit ConverterPints to Liters ConverterUnit ConverterNautical Miles to Kilometers ConverterUnit Converter
Miles to Kilometers ConverterUnit Converter
Inches to Centimeters ConverterUnit Converter
Pounds to Kilograms ConverterUnit Converter
Fahrenheit to Celsius ConverterUnit Converter
GB to MB ConverterUnit Converter
Feet to Meters ConverterUnit Converter
Meters to Feet ConverterUnit Converter
Millimeters to Inches ConverterUnit Converter
Feet to Inches ConverterUnit Converter
Hours to Minutes ConverterUnit Converter
Meters to Centimeters ConverterUnit Converter
Ounces to Grams ConverterUnit Converter
Liters to Gallons ConverterUnit Converter
Gallons to Liters ConverterUnit Converter
MPH to KMH ConverterUnit Converter
KMH to MPH ConverterUnit Converter
Stone to Kilograms ConverterUnit Converter
Kilograms to Stone ConverterUnit Converter
Cups to Milliliters ConverterUnit Converter
Milliliters to Cups ConverterUnit Converter
Fluid Ounces to Milliliters ConverterUnit Converter
Acres to Hectares ConverterUnit Converter
Hectares to Acres ConverterUnit Converter
Square Feet to Square Meters ConverterUnit Converter
Square Meters to Square Feet ConverterUnit Converter
PSI to Bar ConverterUnit Converter
Bar to PSI ConverterUnit Converter
Knots to MPH ConverterUnit Converter
Yards to Meters ConverterUnit Converter
Meters to Yards ConverterUnit Converter
Horsepower to Kilowatts ConverterUnit Converter
Kilowatts to Horsepower ConverterUnit Converter
Pints to Liters ConverterUnit Converter
Nautical Miles to Kilometers ConverterUnit Converter
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