What is the difference between a custom scheme deep link and a Universal Link?

Custom scheme links (myapp://path) always open the app if installed but show an error if not. Universal Links (https://example.com/path) fall back to the website if the app is not installed, providing a better user experience.

Can I test deep links without a physical device?

You can validate URL structure and test Universal Links in a browser. Custom scheme links require the app to be installed on a device or emulator. Use Android Studio's adb or Xcode's Simulator for device testing.

What are deferred deep links?

Deferred deep links take users to a specific in-app screen even if they do not have the app installed — they are directed to the app store first, and upon first launch after installation, the original deep link destination opens. These require a third-party SDK.

ホームツールDeep Link Tester

ディープリンクテスター

Name: ディープリンクテスター
Rating: 4.8 (120 reviews)
Author: DailyDevTools

モバイルディープリンクのテストと起動

リンクをテスト

Use these tools directly in Chrome

Install the DailyDevTools extension — access all tools from your browser toolbar

Add to Chrome

What is Deep Link Tester?

Deep links are URLs that open a specific screen or state within a mobile app, bypassing the home screen (e.g., myapp://product/123 or https://example.com/app/product/123 for Universal Links). DailyDevTools' Deep Link Tester lets you construct, validate, and launch deep links directly from your browser, making mobile development debugging significantly faster.

How to use Deep Link Tester

1Enter your deep link URL (custom scheme like myapp:// or a Universal Link/App Link)
2Click Launch to attempt to open the link — your mobile device or emulator must be connected or the app installed
3Use the URL builder to construct deep links by filling in scheme, host, path, and query parameters
4Check the parsed URL breakdown to verify each component of your link is correctly structured

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