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Free online tools

Fast, private calculators for everyday questions

Choose a free tool below. Your entries stay on your device, and every result appears instantly.

New · AI Website Builder

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Free AI Website Generator

Build a website with AI for free: describe a page, generate complete HTML, preview it and download.

Open AI Website Builder →

Math

All tools
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Percentage Calculator

Calculate percentages, percentage change, and ratios instantly.

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Age Calculator

Find an exact age in years, months, and days from a birth date.

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Date Difference Calculator

Measure the days, weeks, months, and years between two dates.

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Random Number Generator

Generate one or more secure random numbers within a range.

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GPA Calculator

Calculate your weighted GPA on a 4.0 or percentage scale by adding unlimited courses and credit hours.

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Countdown Timer

Count down the days, hours, minutes and seconds to any event and share a link to the same countdown.

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Online Stopwatch

A free online stopwatch with lap times, accurate to a hundredth of a second. Start, pause, record laps and reset in one tap.

Health

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BMI Calculator

Estimate body mass index with metric or imperial measurements.

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Calorie Calculator

Estimate how many calories you need per day to maintain, lose or gain weight, using the Mifflin-St Jeor formula.

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Pregnancy Due Date Calculator

Estimate your baby's due date from the first day of your last period, plus your current week and trimester.

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Sleep Cycle Calculator

Find the best time to go to bed or wake up based on 90-minute sleep cycles, so you wake up feeling refreshed.

Text

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Word & Character Counter

Count words, characters, sentences, paragraphs, and reading time live.

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Password Generator

Create strong random passwords securely on your device.

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Case Converter

Convert text to upper, lower, title, sentence, camel, or snake case.

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JSON Formatter & Validator

Beautify, validate and minify JSON online, with syntax errors shown by line and column. Runs in your browser.

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Text to Speech

Read any text aloud with your browser's built-in voices. Choose the language, voice and speed for free.

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Free AI Website Generator

Build a website with AI for free: describe a page, generate complete HTML, preview it and download.

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AI Post Generator

Free AI post generator for LinkedIn, X and Instagram: type a topic, pick a tone and get a ready-to-post caption with hashtags.

Lorem Ipsum Generator

Generate lorem ipsum placeholder text by paragraphs, sentences or words, then copy it for your designs and mockups.

Finance

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Discount Calculator

Find the final price and amount saved after a discount.

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Loan / EMI Calculator

Estimate monthly loan payments, total interest, and an amortization schedule.

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Tip Calculator

Split a bill and tip fairly between any number of people.

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Compound Interest Calculator

Project investment growth with compounding and monthly contributions.

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Fuel / Trip Cost Calculator

Estimate fuel needed, total trip cost, and each traveller's share.

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Invoice Generator

Create a professional invoice with line items, tax and totals, then download a clean PDF for free.

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Salary to Hourly Calculator

Convert a yearly salary to hourly, daily, weekly and monthly pay, or turn an hourly wage into an annual salary.

Converters

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Unit Converter

Convert length, weight, temperature, area, and volume instantly.

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Time Zone Converter

Convert a date and time between major world zones with daylight saving.

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Roman Numeral Converter

Convert whole numbers to Roman numerals and Roman numerals to numbers.

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QR Code Generator

Create a free QR code from any text or URL, change its colour, and download it as PNG or SVG.

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Image Compressor

Compress JPG, PNG and WebP images in your browser, compare file sizes, and download the smaller file.

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Color Palette Generator

Build complementary, analogous or triadic palettes from a colour or image, with HEX, RGB and HSL codes.

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Image to PDF Converter

Convert JPG, PNG and WebP images to one PDF free. Reorder pages and download instantly; images never leave your device.

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Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to readable text online, with full UTF-8 support for any language.

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Binary, Hex & Decimal Converter

Convert numbers between binary, octal, decimal and hexadecimal instantly, including very large numbers.

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Favicon Generator

Create a favicon from letters or your own image, preview it at real sizes and download PNG icons for any website.