UnitLeap – Unit Converter by Tron

UnitLeap is a fast, good-looking unit converter that opens right in your Firefox sidebar - no popup to reopen every time, and no horizontal scrolling to find the unit you need. Just pick a category from the vertical list, type a number, and see the result update instantly.

FEATURES

• 12 categories: length, weight/mass, temperature, volume, area, speed, time, data storage, pressure, energy, power, and live currency exchange rates (free, no account needed).
• 3 interface languages: English, German, and Arabic, with full right-to-left layout support — switch anytime from the sidebar.
• Material Design color palette: choose from 11 preset accent colors or pick a fully custom one.
• Light, dark, or system-matched theme, plus adjustable font size and decimal precision.
• Favorites: pin the conversions you use often for one-tap access.
• Recent history so you never have to reselect the same units twice.
• One-click swap between units, one-click copy of the result.
• Keyboard shortcut (Ctrl+Shift+U) to open the sidebar instantly.

PRIVACY

UnitLeap doesn't collect, track, or transmit any personal data. Your settings, favorites, and history are stored locally in your browser. The only network request it ever makes is a currency-exchange-rate lookup (no key, no personal data sent) when you use the Currency category — everything else works fully offline.

Built for anyone who converts units throughout the day: students, engineers, travelers, cooks, and developers.