WebTransport✓Baseline · Newly available

Browser support

How to use

Every current browser supports this, but it only became Baseline on Mar 24, 2026. Use it as a progressive enhancement, or keep a fallback if you support older devices.

if ("WebTransport" in globalThis) {
  // WebTransport is available
} else {
  // load a polyfill or use a fallback
}

Sub-features

Support for each part of the feature (42). The overall table above shows when the whole feature works.