This page describes solutions to problems that might occur when you’re trying to use DartPad, whether at dartpad.dev or in a page that has embedded DartPads.
Embedded DartPads on flutter.dev are slow in Safari
Try using another major browser that Dart supports, such as Firefox, Edge (dev channel), or Chrome. This issue is being tracked in the WebKit issue tracker.
Embedded DartPads don’t appear
The dart.dev homepage and many codelabs have embedded DartPads. If these DartPads don’t appear at all, then try the following:
Make sure you’re using a supported browser. DartPad might not work in other browsers, and is known not to work in the default configuration of the Brave browser.
If you’re using an ad blocker, disable it.
If you don’t use an ad blocker, check whether you’ve disabled third-party tracking cookies (Chrome instructions). If you’ve disabled cookies, change your settings to allow cookies for dartpad.dev.
DartPad doesn’t work in China
If you have any other problems when using DartPad, create an issue on GitHub.