Fraction Calculator
Add, subtract, multiply and divide fractions and see the simplified result, the mixed number and the decimal value. Everything runs in your browser; nothing is uploaded.
All Tools
11 working tools live.
Calculators
Percentage Calculator
Work out X percent of Y, what percentage one number is of another, or the percentage increase or decrease between two numbers.
BMI Calculator
Body Mass Index from weight and height, in metric or imperial units, with the standard weight category for the result.
Grade Calculator
Weighted average grade from scores and their weights, plus the letter grade for the result.
Circle Calculator
Enter a radius, diameter, circumference or area and get the other three circle measurements instantly.
PDF Tools
Images to PDF
Combine images into one PDF file, right in your browser. Images never leave your device; the PDF is built locally and downloaded to you.
Image Converters
PNG to JPG Converter
Convert PNG images to JPG in your browser. Transparent areas are filled with white, because JPG has no transparency channel.
Text Tools
Word Counter
Count words, characters, sentences and paragraphs as you type, plus an estimated reading time.
Everyday Tools
Countdown Timer
Count down live to any date and time: days, hours, minutes and seconds, updating every second.
Cybersecurity Tools
Security Header Checker
Check the security headers of any public website: HSTS, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy and Permissions-Policy. The check runs through TinyExe so it works for any public site.
QR Code Tools
QR Code Generator
Turn any URL or short text into a QR code you can download as a PNG. Generated locally in your browser; the text is never sent anywhere.