Free calculators, converters, and utilities

Tools for money, health, numbers, dates, development and media. No sign-up. Everything runs locally in your browser.

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51 free tools · 6 categories · 100% private — runs in your browser

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Find the right tool among 51 free tools.

Finance

Loans, savings, investments, taxes and market hours

Trading Hours
Open/closed status for major stock exchanges
United StatesMortgage Calculator
Monthly mortgage payment with taxes, insurance, PMI and amortization
Loan Calculator
Monthly loan payment with total interest and amortization
Auto Loan Calculator
Monthly car payment with down payment, trade-in, tax and fees
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Health & Fitness

BMI, nutrition, calories and daily macros

BMI Calculator
Calculate your Body Mass Index (BMI) based on height and weight
Nutrition Calculator
Calculate calories and macronutrients based on body composition and activity
Calorie / TDEE Calculator
Estimate maintenance calories and a calorie-deficit target
One-Rep Max Calculator
Estimate one-rep max from weight and reps
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Math & Numbers

Percentages, number calculations and random numbers

Random Number Generator
Random integers in a min–max range
Percentage Calculator
Calculate percentages, increases and decreases
Percent Change Calculator
Calculate percentage increase or decrease
Average, Median and Mode Calculator
Calculate mean, median, modes and range
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Date & Time

Age, date differences and work hours

Clock
Fullscreen digital clock with seconds and light/dark themes
Age Calculator
Calculate exact calendar age and the next birthday
Date Calculator
Find days between dates or add and subtract time
Time Duration Calculator
Find elapsed time and add or subtract hours and minutes
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Developer & IT

Base64, JSON, UUIDs, passwords and hardware tools

Base64 Encoder
Encode plain text to Base64
Base64 Decoder
Decode Base64 to plain text
GUID/UUID Generator
Generate UUIDs with format options
Display Info
Screen resolution, viewport, DPR, and browser details.
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Text & Media

Word counts, text cleanup, images and QR codes

QR Code Generator
Create and download QR codes for links, Wi-Fi and contacts
Word and Character Counter
Count words, characters and reading time
Text Case Converter and Cleanup
Change text case, clean spaces and deduplicate lines
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences or words
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No accounts. No tracking.

No sign-up. No tracking. Works on phone and desktop.

Private by design

Calculations run locally in your browser. Nothing is uploaded.

Fast and light

Static pages with no sign-up. Already loaded tools may work without a connection; offline page caching is not enabled.

Mobile friendly

Responsive layout with dark mode.