Free Online Tools for Everyone
Calculators, converters, developer tools, and more — fast, free, and no signup required.
🧮 Calculators
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Enter your height and weight to check if you are underweight, normal, or overweight.
CalculatorsLoan Calculator
Calculate monthly loan payments, total interest, and amortization schedule. Perfect for mortgage, auto loan, and personal loan planning.
CalculatorsPercentage Calculator
Calculate percentages easily. Find what percent one number is of another, calculate percentage increase/decrease, and more.
CalculatorsAge Calculator
Calculate exact age in years, months, days, hours, and minutes. Find the time difference between any two dates.
Calculators🔄 Converters
Unit Converter
Convert between different units of length, weight, temperature, speed, area, volume, and more. Fast and accurate conversions.
ConvertersColor Converter
Convert colors between HEX, RGB, HSL, and HSV formats. Pick colors and see live preview with color codes.
ConvertersBase64 Encoder / Decoder
Encode text or files to Base64 format, or decode Base64 strings back to plain text. Essential tool for developers and data processing.
Converters💻 Developer Tools
Password Generator
Generate strong, random passwords with customizable length and character options. Create secure passwords for all your accounts.
Developer ToolsJSON Formatter & Validator
Format, beautify, minify, and validate JSON data online. Syntax highlighting and error detection for JSON strings.
Developer ToolsURL Encoder / Decoder
Encode or decode URLs and query parameters. Convert special characters to percent-encoding and vice versa.
Developer ToolsQR Code Generator
Generate QR codes for URLs, text, email, phone numbers, and WiFi. Customize colors and download as PNG image.
Developer Tools📝 Text Tools
📄 PDF Tools
PDF Merge
Combine multiple PDF files into one. Drag and drop to reorder, then merge and download the combined PDF.
PDF ToolsPDF Split
Split a PDF into multiple files by page ranges. Extract specific pages and download as separate PDFs.
PDF ToolsPDF Watermark
Add tiled text watermarks to PDF pages. Customize opacity, rotation, font size, color, and spacing.
PDF ToolsImage to PDF
Convert images (JPG, PNG, etc.) to PDF. Upload multiple images, reorder pages, and download as a single PDF.
PDF ToolsPDF to Image
Convert PDF pages to PNG or JPEG images. Choose DPI and quality, preview all pages, and download individually.
PDF Tools