Browser Compatibility Feature Checker
Check whether your browser supports specific CSS, JavaScript, and web platform features. Use this free browser compatibility checker online to quickly identify supported and unsupported features.
What Is a Browser Compatibility Feature Checker?
A browser compatibility feature checker is an online testing tool that determines whether specific web features are supported by your current browser.
Modern websites rely on many technologies, including CSS properties, JavaScript APIs, HTML features, and browser capabilities. A feature may work correctly in one browser but behave differently or remain unsupported in another.
A compatibility checker helps developers identify these differences before deploying a website or web application.
How Can We Check Browser Compatibility?
You can use a browser compatibility testing tool online in a few simple steps:
Open the browser compatibility checker.
Select or enter the web feature you want to test.
Run the compatibility check.
Review whether the feature is supported.
Test additional features or browsers when needed.
For example:
Feature: CSS Grid
Browser: Chrome
Result: Supported
Or test a JavaScript API:
Feature: Web Storage API
Browser: Current browser
Result: Supported
Why Is Browser Compatibility Testing Important?
Browser compatibility testing helps developers catch problems that may appear when users access a website through different browsers or browser versions.
It can help you:
Identify unsupported CSS features
Check JavaScript API availability
Find potential browser-specific issues
Improve cross-browser compatibility
Decide when a fallback is necessary
Test modern web platform features
A feature being supported by your current browser does not necessarily mean it will work in every browser or older browser version.
Browser Compatibility Checker vs. Browser Testing
A browser compatibility checker focuses on whether a particular feature is supported. Full browser testing goes further by checking how an entire website or application actually behaves across different browsers, devices, and versions. For production websites, both approaches can be useful.