Cameron Jones

Fluid Customizer is a simple plug-and-play plugin which allows you to resize the width of the preview window in the Customizer to whichever size you like. Simply install the plugin, go to your Customizer, then click and drag the right border of the sidebar and watch the magic happen!

Fluid Customizer

Preview your site for a variety of different devices by resizing your Customizer sidebar with a simple click and drag

Weston Ruter

Utkarsh

Derek Herman

Mohammad Taqui Sayed

newscorpau

Customize Snapshots is the feature plugin which prototyped <a href="https://make.wordpress.org/core/2016/10/12/customize-changesets-technical-design-decisions/" rel="nofollow ugc">Customizer changesets</a>; this feature was <a href="https://make.wordpress.org/core/2016/10/12/customize-changesets-formerly-transactions-merge-proposal/" rel="nofollow ugc">merged</a> as part of WordPress 4.7. The term “snapshots” was chosen because the Customizer feature revolved around saving the state (taking a snapshot) of the Customizer at a given time so that the changes could be saved as a draft and scheduled for future publishing.
While the plugin’s technical infrastructure for changesets was merged in WordPress 4.7, the user interface still remains largely in the Customize Snapshots plugin, in which we will continue to iterate and prototype features to merge into core.
For a rundown of all the features, see the screenshots below as well as the 0.6 release video:
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/GH0xo7bTiSs?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
This plugin works particularly well with <a href="https://wordpress.org/plugins/customizer-browser-history/" rel="ugc">Customizer Browser History</a>, which ensures that URL in the browser corresponds to the current panel/section/control that is expanded, as well as the current URL and device being previewed.
Requires PHP 5.3+. Development of this plugin is done <a href="https://github.com/xwp/wp-customize-snapshots" rel="nofollow ugc">on GitHub</a>. Pull requests welcome. Please see <a href="https://github.com/xwp/wp-customize-snapshots" rel="nofollow ugc">issues</a> reported there before going to the <a href="https://wordpress.org/support/plugin/customize-snapshots" rel="ugc">plugin forum</a>.

Customize Snapshots

This is a great plugin. It would be useful to expose the snapshots custom post type in the admin so that users can view the different snapshots, delete the ones they don't need, etc. Is this on the roadmap?



Really handy plugin, works as advertised

It is very professionally developed, I really like the idea and the implementation. Really useful plugin.

Awesome

Provide a UI for managing Customizer changesets; save changesets as named drafts, schedule for publishing; inspect in admin and preview on frontend.

Fluid Customizer vs Customize Snapshots