Herramientas y calculadoras gratuitas
Úsalas al instante, sin app. Utilidades rápidas y privadas que se ejecutan en tu navegador: nada que instalar, sin cuenta.
Convertidores de unidades 14
Length Converter
Convert mm, cm, m, km, inches, feet, yards and miles instantly.
Weight Converter
Convert kg, g, mg, ounces, pounds, stone and tonnes instantly.
Temperature Converter
Celsius, Fahrenheit, Kelvin and Rankine converted as you type.
Volume Converter
Convert liters, ml, gallons, cups, pints, fl oz and more.
Area Converter
Convert m², km², acres, hectares, ft² and more.
Speed Converter
Convert km/h, mph, m/s, knots and ft/s.
Data Size Converter
Convert bytes, KB, MB, GB, TB — decimal and binary.
Fuel Economy Converter
Convert L/100km, km/L, US mpg and UK mpg.
Dinero y finanzas 18
Tip Calculator
Work out the tip and split the bill between friends in seconds.
Discount Calculator
See the final price after a percent-off discount — or find the percentage saved.
Sales Tax Calculator
Add tax to a price, or remove it from a tax-inclusive price.
Simple Interest Calculator
Interest = principal × rate × time, computed instantly.
Compound Interest Calculator
See savings growth with compounding, optional regular contributions.
Loan Payment Calculator
Monthly payment, total interest and payoff total for any loan.
Mortgage Calculator
Estimate monthly mortgage payments including down payment impact.
Fuel Cost Calculator
Trip fuel cost from distance, efficiency and fuel price.
Fecha y hora 10
Age Calculator
Exact age in years, months, days — plus days lived until a date.
Date Difference Calculator
Days, weeks, months and years between any two dates.
Add or Subtract Days
Add or subtract days, weeks, months or years from a date.
Countdown Timer
Count down hours, minutes and seconds with an alarm beep.
Stopwatch
Precise stopwatch with laps and hundredths of a second.
Date to Unix Timestamp Converter
Turn any date and time into Unix seconds and milliseconds.
Timestamp to Date Converter
Decode Unix timestamps into readable local and UTC times.
Business Days Calculator
Count working days between dates, with a custom work week.
Generadores 18
Password Generator
Strong random passwords — length, symbols and ambiguity options.
Random Number Generator
Random integers in any range, with optional duplicates allowed.
Coin Flip
Flip one or many virtual coins and count heads vs tails.
Dice Roller
Roll any number of dice with any number of sides.
UUID Generator
Generate v4 UUIDs in bulk with one-click copy.
QR Code Generator
Make QR codes from links or text and download as PNG.
Hash Generator
SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text.
Hash Verifier
Check text against an expected SHA hash — the valid “reverse” of hashing.
Herramientas de texto 19
Word Counter
Words, characters, sentences, paragraphs and reading time.
Case Converter
Switch text between UPPER, lower, Title, Sentence and camelCase.
Line Sorter
Sort lines A→Z, Z→A, by length, or shuffle them.
Remove Duplicate Lines
Strip repeated lines, optionally ignoring case and trimming space.
Whitespace Cleaner
Trim line ends, collapse spaces and remove empty lines.
Find & Replace
Replace every occurrence, optionally with regex support.
Lorem Ipsum Generator
Classic filler text by paragraphs, sentences or words.
Text Reverser
Flip characters, words or lines — or mirror each word.
Cotidiano y salud 18
Calories Burned Calculator
kcal burned per session and per week, from MET tables.
Water Intake Calculator
Personal daily water target in liters and glasses.
Ideal Weight Calculator
Four classic formulas and the healthy-BMI range compared.
Body Fat Percentage Calculator
US Navy tape method: body fat, fat and lean mass.
Due Date Calculator
Estimated due date from LMP with cycle adjustment.
Bedtime & Sleep Cycle Calculator
Work back from your alarm in 90-minute sleep cycles.
BMI Calculator
Body Mass Index from height and weight, with category.
BMR & Calorie Calculator
Basal metabolic rate and daily calories by activity level.
Herramientas para desarrolladores 24
Base64 Encoder / Decoder
Encode text to Base64 or decode it back, URL-safe optional.
URL Encoder / Decoder
Percent-encode or decode URLs and query parameters.
JSON Formatter & Validator
Pretty-print or minify JSON and pinpoint syntax errors.
Color Converter
Convert HEX, RGB and HSL both ways, with a live swatch.
HTML Entity Encoder
Escape (or unescape) & < > " ' for safe HTML.
Decimal to Binary Converter
Convert decimal numbers to binary, with hex and octal alongside.
Binary to Decimal Converter
Turn 0s and 1s back into a decimal number, validated as you type.
Decimal to Hexadecimal Converter
Convert base-10 numbers to hex with prefix and case options.