Popular Tools

Quickly calculate natural, binary, and common logarithms with custom precision. Perfect for math students and scientific calculations.

Online text case converter supporting multiple modes including uppercase, lowercase, and title case.

Calculate your personal lucky number based on your Gregorian birthday and generate a custom visual badge.

Process JSON data online: format, minify, and validate to boost your development and debugging efficiency.

Quickly calculate the area of a trapezoid by entering the top base, bottom base, and height. Supports custom units and precision settings.

Quickly check ISO 216 standard A-series paper sizes from A0 to A13. View accurate dimensions in both millimeters and inches with aspect ratio references.

Encode text, links, and other information into scannable QR code images with customizable error correction levels and colors.

Calculate the P/F ratio using PaO2 and FiO2 to assess ARDS risk and pulmonary oxygenation function.

Generate random data that matches the Turkish address structure. Ideal for testing, development, and privacy protection.

A pixel and EM unit converter for front-end developers featuring custom base font sizes and real-time two-way conversion.

Calculate your baby's possible blood types and genetic probabilities based on the parents' ABO and Rh factors.

Measure your visual reaction time online. Run multiple tests to calculate an average and see where your reaction speed stands.

Look up exact millimeter dimensions for D0 to D6 series paper based on the GB/T 19999-2003 national standard, suitable for book, magazine, and office paper design.

Check US standard paper sizes, including everyday, ANSI, and ARCH series. Features millimeter and inch conversions with visual proportion charts.

Convert pixel values to percentages based on root font size. Ideal for CSS responsive design and fluid layouts.

Enter data to generate 1D barcodes like EAN-13 and Code 128. Export PNG, JPEG, or SVG images for printing and scanning.

Generate MD5 hash values for any data. Ideal for data integrity checks, file verification, and more.

Simulate real dice rolls online. Supports multi-sided dice and bulk rolling, instantly displaying individual results and the total sum.

Professional bidirectional RGB and CMYK color code converter. Fix screen-to-print color shifts and get accurate, real-time conversion results.

Convert between 5 temperature units online, including Celsius, Fahrenheit, and Kelvin. Supports custom decimal precision and one-click copy.