A tool for testing responsive websites crazy-fast

Sizzy is a tool (website) created by Kitze to speed up the development process of responsive websites.

Note: The tool uses iframes to render the various views. If you are testing your own site(s) ensure you do not have the “X-Frame-Options” header set to “sameorigin”.

If your site, or any other site you are trying to view, has the header set, you will not be able to use this tool.

There are various ways you can use the tool.

Using the website

1. Visit https://sizzy.co
2. Paste any URL into the input box and press enter.
3. Play with the various options available to you.

Chrome Extension

Adds a Sizzy button in the Chrome toolbar, which on click opens any page directly into Sizzy.

Chrome Extension

Localhost (for developers)

1. Install the dependencies:
   yarn install

2. Start the server:
   yarn start

3. Open it in your browser
   http://localhost:3033/

Tip: You can also use npm instead of yarn, and if you want to use yarn but you don’t have it on your machine, here’s how to install it.