Learn Measure Blog Live About
Pipette with purple liquid

Getting started with Chrome's origin trials

Origin trials are a way to test a new or experimental web platform feature, and give feedback to the web standards community on the feature's usability, practicality, and effectiveness, before the feature is made available to all users.


Origin trials give you access to a new or experimental feature, to build functionality your users can try out for a limited time before the feature is made available to everyone.

When Chrome offers an origin trial for a feature, you can register for the trial to enable the feature for all users on your origin, without requiring them to toggle any flags or switch to an alternative build of Chrome (though they may need to upgrade). Origin trials enable developers to build demos and prototypes using new features. The trials also help Chrome engineers understand how new features are used, and how they may interact with other web technologies.

Origin trials are public and open to all developers. They are limited in duration and usage. Participation is a self-managed process with limited documentation and support. Participants should be willing and able to work relatively independently using the documentation available, which, at this stage, will likely be limited to API specifications and explainers, though web.dev tries to provide guidance whenever possible.

If you register for a trial, the Chrome team will periodically ask you for specific feedback on your use of the trial feature. Some features may undergo multiple origin trials, as learnings are incorporated and adjustments are made.

How to register for an origin trial

  1. Choose an origin trial from the list of active trials.

  2. Request a token.

  3. Add the token to your web pages, using a <meta> tag or an Origin-Trial HTTP response header.

    • As a meta tag in the <head> of each page served:
      <meta http-equiv="origin-trial" content="TOKEN_GOES_HERE">
    • As an HTTP header:
      Origin-Trial: TOKEN_GOES_HERE
  4. Try out the new feature.

  5. Submit feedback. Do this through the origin trial site. This feedback is not public and is available only to a limited group of people on the Chrome team. Each trial also provides a link for spontaneous community feedback. This typically points to the the feature on GitHub or some other public channel.

Find out more

Photo by Louis Reed on Unsplash.

Last updated: Improve article