Converters Tools
Convert length, weight, temperature, area, volume, speed, time, data storage, pressure, energy and power — plus extract audio from videos you own, entirely in your browser.
12 tools
Length Converter
Convert mm, cm, m, km, inches, feet, yards and miles instantly in your browser.
Weight Converter
Convert grams, kilograms, ounces, pounds, stones and tonnes locally in your browser.
Temperature Converter
Convert Celsius, Fahrenheit and Kelvin with correct offset math, entirely offline.
Area Converter
Convert square metres, square feet, acres, hectares and more in your browser.
Volume Converter
Convert millilitres, litres, cups, fluid ounces, gallons and cubic metres locally.
Speed Converter
Convert km/h, mph, m/s, knots and ft/s instantly with no uploads.
Time Converter
Convert seconds, minutes, hours, days, weeks, months and years in your browser.
Data Converter
Convert bits, bytes, KB, MB, GB and TB with decimal and binary (KiB/MiB) modes.
Pressure Converter
Convert Pa, kPa, bar, PSI, atm, mmHg and inHg locally in your browser.
Energy Converter
Convert joules, kilojoules, calories, kcal, Wh, kWh and BTU entirely offline.
Power Converter
Convert watts, kilowatts, horsepower, BTU/h and dBm-adjacent scales in your browser.
Video to MP3
Extract audio from MP4, WebM and MOV videos you own and save it as WAV or MP3 — 100% in your browser.
Converters guides
Practical how-tos that use these tools — short, specific, no filler.
- How to Convert MP4 to MP3Extract audio from video files you own: formats, bitrates, quality expectations and the honest limits of browser conversion.
- How Browser-Based File Processing Protects PrivacyWhy local-first tools are structurally safer than upload sites: what happens technically, and how to verify the claim.