1) Manual Check
Most modern browsers, like Chrome, Firefox, Edge, and Safari, support <canvas>. You can try opening a webpage that uses <canvas> (such as online drawing apps or games) and see if it works.
2) Test using JavaScript
You can run this small snippet in the browser console. For example,
<script> if (!!document.createElement("canvas").getContext) { console.log("HTML5 Canvas is supported in your browser."); } else { console.log("HTML5 Canvas is NOT supported."); } </script>
If your browser supports <canvas>, it will print a confirmation message.
3) Online Compatibility Tools
You can use online tools like Can I Use to know browser compatibility of different HTML5 features, including <canvas> element.