Free Online Converters
Convert units, file formats, and data structures.
150+ Free Online Tools
PDF, image, text, developer, SEO & more — all run in your browser
Soon
Unit Converter
Convert length, weight, volume, and more.
Soon
Length Converter
Meters, feet, inches, miles.
Soon
Weight Converter
Kilograms, pounds, ounces, tons.
Soon
Temperature Converter
Celsius, Fahrenheit, Kelvin.
Soon
Speed Converter
km/h, mph, m/s, knots.
Soon
Area Converter
Square meters, acres, hectares.
Soon
Volume Converter
Liters, gallons, ounces.
Soon
Time Converter
Seconds, minutes, hours, days.
Soon
File Size Converter
KB, MB, GB, TB.
CSV to JSON
Parse CSV into JSON.
Soon
JSON to CSV
Flatten JSON arrays into CSV.
Markdown to HTML
Render Markdown as HTML.
Soon
HTML to Markdown
Convert HTML back to Markdown.
About converter tools
A fast set of converters covering the units and formats you need every day — from temperature and currency to CSV, JSON, and Markdown transformations.
Frequently asked questions
Yes. All formulas are based on SI standards and up-to-date reference values.