Unit Conversion for Safari

About this app

Smart Unit Converter for Safari automatically detects measurements on web pages and converts them instantly while you browse. When reading international websites, you often see unfamiliar units such as Fahrenheit, miles, inches, pounds, or gallons. This extension detects those values directly on the page and displays the converted result next to them so you can understand measurements immediately. Unlike traditional unit converter apps, Smart Unit Converter works directly inside Safari. You do not need to copy values or search for conversions. Everything appears automatically while you browse. The extension supports bidirectional conversion between metric and imperial units. Whether a page uses Fahrenheit or Celsius, miles or kilometers, pounds or kilograms, both units are displayed so you can instantly understand the measurement. Examples 70°F (≈ 21°C) 25°C (≈ 77°F) 5 miles (≈ 8 km) 10 km (≈ 6.2 mi) 10 lb (≈ 4.5 kg) 1 gallon (≈ 3.78 L) Key Features Automatic unit detection on web pages Bidirectional conversion between metric and imperial units Supports temperature length weight and volume conversions Inline display or hover display modes Click converted values to copy Enable or disable conversion for specific websites Category control for temperature length weight and volume Fast local processing with no external communication Smart Unit Converter for Safari is designed to be lightweight, fast, and privacy friendly. All processing happens locally in your browser with no data collection. The extension supports multiple languages and automatically adapts to your system language. Perfect for reading international articles, shopping online, DIY tutorials, technical documentation, and global news.

Added a speed category (mph and km/h, both directions). Conversions no longer stop on long or endlessly scrolling pages. Settings changes now apply instantly without reloading the page.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

1. First observed Aug 25, 2026 · 2:59 PM $1.99