Free Online Tools
31 focused utilities for desktop and mobile.
WispData tools are built around a simple idea: put the useful function first, avoid unnecessary accounts or uploads, and make each page easy to bookmark and return to.
Convert
Convert measurements, units, time zones and everyday values between common formats.
Time Zone Converter
Compare cities, local times and UTC offsets on a visual world map.
Universal Unit Converter
Convert length, mass, temperature, area, volume, speed, data and more.
CM, Inches & Height Converter
Convert centimetres, inches and feet/inches with human-height formatting.
KG to Pounds Converter
Convert kilograms to pounds and pounds to kilograms instantly.
MM to Inches Converter
Convert millimetres to inches and inches to millimetres instantly.
Temperature Converter
Convert Celsius, Fahrenheit and Kelvin instantly.
Cooking Measurement Converter
Convert cups, mL, tablespoons, teaspoons and fluid ounces.
MPG ↔ L/100km Converter
Convert US MPG, Imperial MPG and litres per 100 km.
Calculate
Solve percentages, dates, taxes, finance, fractions and other everyday calculations.
Percentage Calculator
Calculate percentages, percentage change, increases, decreases and reverse percentages.
Age Calculator
Calculate exact age, next birthday and approximate days, weeks and months lived.
Date Difference Calculator
Find days between dates, add or subtract days and count business days.
Tip Calculator
Calculate tip amount, total bill and per-person split.
Fraction Calculator
Add, subtract, multiply, divide and simplify fractions.
Discount Calculator
Calculate sale price, savings and stacked discounts.
Sales Tax Calculator
Add or reverse any sales-tax rate from a price.
Canada GST/HST Calculator
Calculate GST/HST totals and reverse tax-inclusive prices by province.
Income Tax & Paycheck Calculator
Estimate income tax, payroll deductions and take-home pay by country and pay frequency.
Compound Interest Calculator
Estimate compound growth with optional recurring contributions.
Loan Payment Calculator
Estimate monthly payment, total interest and total repayment.
Aspect Ratio Calculator
Calculate missing dimensions and simplify aspect ratios.
Create
Generate QR codes, secure passwords, random numbers and picker-wheel results in your browser.
QR Code Generator
Create static QR codes locally in your browser without sending the contents anywhere.
Random Wheel / Name Picker
Paste names or choices and spin a private random picker wheel.
Random Number Generator
Generate secure random integers or decimals in a range, with optional no-repeat mode.
Secure Password Generator
Generate cryptographically secure passwords and passphrases entirely in your browser.
Developer
Format, encode and transform developer data such as JSON, Base64, UUIDs, timestamps and text.
Color Picker & Converter
Convert HEX, RGB and HSL colors and check contrast against black and white.
Word & Character Counter
Count words, characters, sentences, paragraphs and estimated reading time.
Base64 Encoder & Decoder
Encode and decode text as Base64 locally in your browser.
Case Converter
Convert text to upper, lower, title, sentence, camel, Pascal, snake and kebab case.
JSON Formatter & Validator
Validate, beautify and minify JSON without sending it anywhere.
Unix Timestamp Converter
Convert Unix timestamps to dates and dates back to Unix time.
UUID Generator
Generate RFC 4122 version 4 UUIDs using secure browser randomness.