Unitwise — Quick Unit Converter

Fast, private, fully offline unit conversion. Open, type a number, get the answer instantly.

Unitwise turns unit conversion into a two-second toolbar trip: open the popup, type a number, and read the answer as you type — no search engine, no web page, no waiting. WHAT IT DOES - Converts instantly as you type across six categories: length, mass/weight, temperature, volume, area, and speed - From/to unit pickers grouped by category, with a one-click swap button - Remembers your recent conversions so repeat lookups are one click - Favorite unit pairs and a default category, set on a clean Options page - Adjustable decimal precision for exactly the detail you need PRIVATE BY DESIGN Unitwise works completely offline. It makes no network calls and requests only the storage permission, used to save your own preferences and recent conversions in your browser's local storage. No account, no analytics — nothing ever leaves your machine.