Free Online Tools,
Built to Be Fast

Clean, accurate calculators and utilities. No sign-up, no clutter, no nonsense — just the tool you need.

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Free tools

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Calculators

Percentage Calculator

Percent of a number, change, increase, decrease & difference

Body Mass Index from height and weight

Loan Calculator

Monthly payments, interest & amortization schedule

Exact age in years, months, and days

Salary Calculator

Annual to hourly, monthly, weekly breakdown

Calculate tips & split bills instantly

Discount Calculator

Sale prices, savings & double discounts

Compound Interest

Investment growth with contributions & compounding

Semester & cumulative GPA on 4.0 scale

Stopwatch & Timer

Stopwatch with laps & countdown timer with alarm

Converters

Length, weight, temperature, volume & more

Color Converter

HEX, RGB, HSL conversion & color picker

Time Zone Converter

Convert times between any time zones worldwide

Generators

Password Generator

Strong, random passwords with custom rules

QR Code Generator

Generate QR codes for URLs, text, WiFi & more

Lorem Ipsum Generator

Placeholder text for designs & mockups

Random UUIDs (v4), crypto-secure, single or bulk

Invoice Generator

Create professional invoices — download as PDF

Text Tools

Count words, characters, sentences & reading time

Beautify, validate & minify JSON data

Base64 Encode/Decode

Encode text to Base64 & decode back instantly

Image Tools

Image Compressor

Reduce image file size without losing quality

Why CrispTool?

Most online tool sites are slow, bloated with ads, and look like they were built in 2005. We think you deserve better. Every tool on CrispTool is designed to load instantly, work accurately, and look clean on any device.

All calculations run directly in your browser — your data never leaves your device. No accounts, no tracking, no popups. Just open the tool, get your answer, and move on.

We're adding new tools regularly. Bookmark this page and check back soon.