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WordPress 6.6 RC3 is ready for download and testing!

This version of the WordPress software is under development. Please do not install, run, or test this version of WordPress on production or mission-critical websites. Instead, please evaluate RC3 on a test server or a local environment.

Reaching this phase of the release cycle is a worthy achievement. While release candidates are considered ready for release, your testing is still vital to make sure everything in WordPress 6.6 is the best it can be.

You can test WordPress 6.6 RC3 in four ways:

PluginInstall and activate the WordPress Beta Tester plugin on a WordPress install. (Select the “Bleeding edge” channel and “Beta/RC Only” stream).Direct DownloadDownload the RC3 version (zip) and install it on a WordPress website.Command LineUse the this WP-CLI command:
wp core update –version=6.6-RC3WordPress PlaygroundUse the 6.6 RC3 WordPress Playground instance (available within 35 minutes after the release is ready) to test the software directly in your browser without the need for a separate site or setup.Please test WordPress 6.6 RC3 in one or more of these four ways.

The target for the WordPress 6.6 release is next Tuesday, July 16, 2024. Get an overview of the 6.6 release cycle, and check the Make WordPress Core blog for 6.6-related posts in the next few weeks for further details.

What’s in WordPress 6.6 RC3?

Thanks to your testing (and many other contributors‘ up to now) this release includes eight bug fixes for the Editor and 18 tickets for WordPress Core.

Get a recap of WordPress 6.6’s highlighted features in the Beta 1 announcement. For more technical information related to issues addressed since RC 2, you can browse the following links:

GitHub commits for 6.6 since July 2

Closed Trac tickets since July 2

Want to look deeper into the details and technical notes for this release? You might want to make your first stop The WordPress 6.6 Field Guide. Then, check out this list:

Roster of design tools per block (WordPress 6.6 edition)

All 6.6-related developer notes

You can contribute. Here’s how

WordPress is the world’s most popular open source web platform, thanks to a passionate community of people who collaborate on its development in a wide variety of ways. You can help—whether or not you have any technical expertise.

Get involved in testing

Testing for issues is critical to keeping WordPress speedy, stable, and secure. It’s also a vital way for anyone to contribute. This detailed guide will walk you through testing features in WordPress 6.6. If you’re new to testing, follow this general testing guide for more details on getting set up.

If you encounter an issue, please report it to the Alpha/Beta area of the support forums. If you are comfortable writing a reproducible bug report, you can also report it on WordPress Trac. Before you do either, you may want to check your issue against a list of known bugs.

Curious about testing releases in general? Follow along with the testing initiatives in Make Core and join the #core-test channel on Making WordPress Slack.

Search for vulnerabilities

From now until the final release candidate of WordPress 6.6 (scheduled for July 9), the financial reward for reporting new, unreleased security vulnerabilities doubles. Please follow responsible disclosure practices as detailed in the project’s security practices and policies outlined on the HackerOne page and in the security white paper.

Update your WordPress product

If you build themes, plugins, blocks, or patterns, your efforts play an integral role in adding new functionality to WordPress and helping bring new people and ideas to the most vibrant (and massive!) open source community in the world. 

Thanks for continuing to test your products with the WordPress 6.6 betas and release candidates. With RC3, you’ll want to make sure everything is working smoothly, and if it’s a plugin, update the “Tested up to” version in its readme file to 6.6.

If you find compatibility issues, please post detailed information to the support forum.

Help translate WordPress

Do you speak a language other than English? ¿Español? Français? Русский? 日本語? हिन्दी? বাংলা? You can help translate WordPress into more than 100 languages.

The RC3 haiku

One week to go. Then:
Open the paintbox! Try the tools!
Play a new jazz tune.

Props to @meher and @audrasjb. for peer review.