Unit Conversion for Safari
Convert units while browsing
$1.99 · Designed for iPad. Not verified for macOS.
Convert units right on the page — length, weight, temperature and more, without ever leaving Safari.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
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.
The developer, Seiya.k, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- seiya kawano
- Size
- 4.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 seiya kawano
