Joomla 6.0 Has Arrived

Two years of community effort, hundreds of pull requests, and countless sprint sessions have led to this moment — Joomla 6.0 (Kuimarisha) and Joomla 5.4 (Kutegemea) are officially here. Here's everything you need to know about what's new, what changed, and how to upgrade.

What Is Joomla 6.0 and Why Does It Matter?

Joomla 6.0 is a new major version of the open-source CMS, bringing significant new features, performance improvements, and cleaner code architecture. Released on October 14, 2025, it's suitable for individuals, bloggers, charities, web agencies, and large enterprises alike.

Alongside 6.0, the team also dropped Joomla 5.4 — a bridge release designed to make upgrading from the 5.x series as painless as possible. If you're running Joomla 5.x, you update to 5.4 first, then jump to 6.0 without a full migration.

Step 1 — Download Joomla 6.0 or 5.4

Getting the new release is straightforward. Head to the official downloads page and grab the full package that matches your current installation.

1. New installation: Download the Joomla 6.0.0 Full Package directly, or browse all packages at downloads.joomla.org.
2. Existing Joomla 5.x users: First update to Joomla 5.4.0, then upgrade to 6.0 — no full migration needed.
3. Existing Joomla 4.x users: Follow the official Joomla 4.4 to 5.x upgrade guide before moving to 6.0.
4. Want to try first? Use launch.joomla.org to spin up a free Joomla site instantly — no installation required.

Step 2 — Explore What's New in Joomla 6.0

Joomla 6 ships with a focused set of headline features aimed at usability, performance, and modern development practices. Here's a breakdown of the most impactful changes.

Automatic Core Updates

This is arguably the biggest quality-of-life improvement in years. Building on the TUF (The Update Framework) secure update system introduced in Joomla 5.1, Joomla 5.4 and 6.0 now support automatic Joomla core updates. Your site can stay secure and current without manual intervention.

Cassiopeia Child Template with Extended Customisation

Joomla 6 ships a new Cassiopeia child template that exposes extended color and font-size options directly in the template manager. You can now define your brand colors and typography without touching a custom CSS file — great for designers and non-developers alike.

Advanced Versioning — Custom Fields Included

Historically, Joomla's versioning system only tracked database table data — meaning custom fields were silently excluded from version history. That limitation is now fixed. Custom field data is fully included in versioning, giving editors a complete content history.

Two New Custom Field Types

Joomla 6 adds two handy custom field types that editors have been requesting for a long time:

• Notes field — insert instructions or contextual hints between custom fields to guide content editors.
• Numbers field — display numeric values with optional currency formatting, useful for pricing, statistics, or data-driven pages.

CSS Transitions in Atum & Cassiopeia

Both the default frontend template (Cassiopeia) and the backend admin template (Atum) now use CSS transitions for page navigation. The result is a noticeably smoother browsing experience across the entire interface.

Step 3 — Developer Features & Optimisations

Joomla 6 isn't just for end users — the development team shipped several under-the-hood improvements that benefit extension authors and site builders.

1. New Date and Datetime fields: Native date and datetime-local HTML input types are now available as built-in field types, simplifying date handling in forms and custom fields.
2. TinyMCE 8.0.1: The bundled rich text editor jumps from version 6 all the way to version 8, bringing a wave of bug fixes and major accessibility improvements for content editors.
3. Language file caching: A new caching layer for the languageHelper::parseIniFile method dramatically reduces the overhead of loading language strings on every request — a meaningful performance gain for multilingual sites.
4. Backward Compatibility 6 plugin: Introduced in Joomla 5.4, this plugin ensures third-party extensions that depend on it won't block or fail your upgrade to Joomla 6. It exists and stays enabled in 5.4 so your 6.0 upgrade just works.

Step 4 — How to Upgrade to Joomla 6.0

The upgrade path depends on which version you're currently running. The good news: upgrading from 5.4 to 6.0 is treated as an upgrade, not a migration — most extensions will work immediately with the Backward Compatibility 6 plugin enabled.

1. From Joomla 5.x: Update your site to Joomla 5.4.0 first. Once on 5.4, the in-built updater will offer the 6.0 upgrade path. Review the 5.4 → 6.0 Upgrade Notes.
2. From Joomla 4.4.x: Follow the 4.4 → 5.x step-by-step guide, then proceed to 5.4 → 6.0.
3. Check your extensions: Verify that your installed extensions have Joomla 6–compatible versions available. Enable the Behaviour – Backward Compatibility 6 plugin to keep older extensions running during the transition.
4. Back up first: Always take a full site and database backup before any major upgrade. Tools like Akeeba Backup make this quick and reliable.

Bonus Tip — Try Joomla 6 Without Installing Anything

Not ready to upgrade your live site just yet? The Joomla team provides launch.joomla.org — a free, instant Joomla demo environment where you can explore the new admin interface, templates, and custom fields without touching your production server. It's the safest way to evaluate Joomla 6 before committing to an upgrade.

Troubleshooting Common Upgrade Issues

Most Joomla 6 upgrades go smoothly, but here are the situations to watch for and how to handle them.

1. Extension compatibility errors: Enable the Behaviour – Backward Compatibility 6 plugin in System → Plugins. If an extension still fails, check the developer's site for a Joomla 6–compatible release.
2. Template layout broken after upgrade: If you've been using a child theme of Cassiopeia, compare your overrides against the new template files. Some layout changes may require manual merging.
3. Custom fields missing from version history: This is now fixed in Joomla 6. If you're seeing gaps, they predate the upgrade — new edits will be versioned correctly going forward.
4. Language strings not loading correctly: Clear your Joomla cache under System → Clear Cache after upgrading. The new language file caching layer requires a cold start.
5. TinyMCE editor layout looks off: With the jump to TinyMCE 8, some custom editor configurations may need to be reviewed. Reset your TinyMCE plugin settings to defaults as a first step.

Final Checklist Before You Go Live on Joomla 6

• ✅ Full site and database backup taken and tested
• ✅ All extensions checked for Joomla 6 compatibility
• ✅ Behaviour – Backward Compatibility 6 plugin enabled
• ✅ Updated to Joomla 5.4.0 (if coming from 5.x)
• ✅ Upgrade Notes reviewed: 5.4 → 6.0 guide
• ✅ Automatic updates configured and enabled
• ✅ Cassiopeia child template colours and fonts reviewed
• ✅ TinyMCE 8 editor tested in all article types
• ✅ Custom field versioning verified on a test article
• ✅ Cache cleared and site tested in staging before production push

Joomla 6 Is a Strong, Steady Step Forward

Joomla 6.0 isn't a flashy rebuild — it's a mature, deliberate major release that fixes long-standing gaps (custom field versioning, automatic updates), modernises the interface (CSS transitions, TinyMCE 8), and gives designers more control out of the box (Cassiopeia child template). Pair that with a smooth 5.4 → 6.0 upgrade path and there's a compelling case to move sooner rather than later.

The Joomla community — over 32 contributors and 200+ merged pull requests for 6.0 alone — continues to prove this platform's longevity. Whether you're maintaining an existing site or starting fresh, Joomla 6 gives you a solid, future-proof foundation.

Ready to upgrade? Grab the Joomla 6.0.0 download and follow the steps above. Your site — and your visitors — will thank you.