Upgrade Joomla 3 to Joomla 5 — Professional Migration Service
Joomla 3 reached its official end of life on 17 August 2023. Since that date, the Joomla Project has released no security patches, no bug fixes, and no compatibility updates for the 3.x series. Every Joomla 3 website is now running on unsupported, unpatched software — and the risks grow with every passing month.
If your organisation relies on a Joomla 3 website, upgrading to Joomla 5 is not a matter of preference. It is a matter of operational security, regulatory compliance, and business continuity. Joomla 5 is the current Long Term Support (LTS) release, backed by active development, regular security patches, and a clear support roadmap. It is the most stable, proven target for organisations that value reliability over novelty.
We specialise in Joomla 3 to Joomla 5 migrations for European businesses. Our structured migration process preserves your content, protects your search rankings, updates your extensions, and delivers a modern, secure website — tested thoroughly before anything goes live.
Get a Free Joomla 3 Site Audit →
Why Joomla 3 Must Be Upgraded Now
Joomla 3 served the community well for over a decade. First released in 2012, it powered millions of websites and established itself as one of the most capable open-source content management systems available. However, a decade of service also means a decade of accumulated technical debt, deprecated functions, and architectural decisions that no longer align with modern web standards.
Security Vulnerabilities Are Permanent
Since August 2023, multiple security vulnerabilities have been discovered in Joomla that affect version 3.x. These vulnerabilities have been patched in Joomla 4 and 5, but no corresponding fixes have been released for Joomla 3. The details of these vulnerabilities are publicly documented in the Joomla Security Centre, which means that anyone — including attackers — can review the exact nature of each weakness and craft exploits specifically targeting Joomla 3 installations.
Community efforts such as the Joomla 3.10.999 project have provided unofficial patches for some of these issues, and the paid Extended Long Term Support (eLTS) programme offered temporary coverage. However, these are stopgap measures, not solutions. The only genuine fix is migrating to a supported Joomla version.
PHP Compatibility Is Ending
Joomla 3 was designed to run on PHP 5.6 through PHP 7.4. Most hosting providers have already deprecated PHP 7.4, and many are now dropping support for it entirely. When your hosting provider removes PHP 7.4 from their servers, your Joomla 3 website will either stop working or be forced onto a PHP version it was never designed to support — causing unpredictable errors, broken extensions, and potential data corruption.
Joomla 5 requires PHP 8.1 at minimum, with PHP 8.2 or 8.3 recommended. These are actively supported PHP versions that receive regular security updates and performance improvements. Upgrading your Joomla version also means upgrading your PHP environment, which brings measurable performance gains even before considering the improvements in the Joomla codebase itself.
Extensions Are Abandoning Joomla 3
Extension developers follow the market. As Joomla 3 usage declines, fewer developers invest time maintaining Joomla 3 compatibility for their products. Many popular extensions have already released their final Joomla 3 versions and shifted their development efforts entirely to Joomla 4, 5, and 6.
This means that even if your Joomla 3 website appears to function normally today, the extensions it depends on are increasingly likely to contain unpatched vulnerabilities of their own. An extension that no longer receives updates is a liability — and most Joomla 3 sites rely on dozens of them.
Search Engines Penalise Insecure Sites
Google may flag websites with known security vulnerabilities in its search results, displaying warnings such as "This site may be hacked" or "This site may harm your computer." These warnings devastate click-through rates and can take weeks to remove even after the underlying issues are resolved. If your Joomla 3 site is compromised, the damage to your search visibility can far exceed the cost of a planned upgrade.
GDPR and EU Compliance Require Current Software
Under the General Data Protection Regulation, organisations must implement appropriate technical measures to protect personal data. Running a content management system that has not received a security update in years is difficult to defend as an "appropriate technical measure" in any regulatory review. If a breach occurs and the root cause is traced to an unpatched Joomla 3 installation, the consequences under GDPR can be severe.
Similarly, the European Accessibility Act — enforceable since June 2025 — requires websites to meet accessibility standards that Joomla 3 was never designed to support natively. Joomla 5 includes significant accessibility improvements in both its frontend and backend that make EAA compliance substantially easier to achieve.
Why Choose Joomla 5 as Your Upgrade Target
When upgrading from Joomla 3, you have two modern targets available: Joomla 5 and Joomla 6. Both are actively supported and receive regular updates. The choice between them depends on your organisation's priorities.
Joomla 5 Is the Long Term Support Release
Joomla 5.4 is the current LTS release, which means it receives extended support and security patches over a longer period. For organisations that prioritise stability, proven reliability, and minimal disruption, Joomla 5 is the conservative and often preferable choice.
The extension ecosystem for Joomla 5 is mature. The vast majority of actively maintained Joomla extensions have released stable, tested versions for Joomla 5. Template frameworks and page builders have had over a year to optimise for the platform. When you migrate to Joomla 5, you are migrating to a known quantity — a version that has been thoroughly tested by tens of thousands of production websites.
Joomla 5 Shares Architecture with Joomla 4
Joomla 4 and 5 share the same fundamental architecture. Joomla 5 is essentially a refined, improved version of Joomla 4, with deprecated features removed and performance optimisations applied. This means that the migration path from Joomla 3 to 5 follows the same technical process as Joomla 3 to 4 — a process that has been refined and documented over several years by both the Joomla community and professional service providers.
Future Upgrade Path Is Clear
Migrating to Joomla 5 does not lock you into an old version. When you are ready to move to Joomla 6, the upgrade from Joomla 5.4 to Joomla 6 is straightforward — a standard in-place upgrade through the Joomla Update component. By migrating to Joomla 5 now, you establish a solid foundation and give your extensions and templates time to mature on the Joomla 6 platform before you make that transition.
If you prefer to migrate directly to Joomla 6, we offer that service as well. Read about our Joomla 3 to 6 migration service →
What Changes Between Joomla 3 and Joomla 5
The gap between Joomla 3 and Joomla 5 is significant. This is not a minor version update — it is a generational shift in the platform's architecture, codebase, and capabilities. Understanding these changes is essential for planning a successful migration.
Architecture and Codebase
Joomla 5 is built on a completely rewritten framework. The legacy MVC (Model-View-Controller) architecture used in Joomla 3 has been replaced with a modern, namespaced, PSR-compliant codebase. This is the primary reason a Joomla 3 site cannot simply be "updated" to Joomla 5 — the underlying code that extensions and templates depend on has fundamentally changed.
For your website's functionality, this means that every extension must have a version specifically built for Joomla 4 or 5. Extensions written exclusively for Joomla 3 will not work on Joomla 5 without being rewritten or replaced with alternatives.
Template System
Joomla 3 templates were built on Bootstrap 2, which has been obsolete since 2013. Joomla 5 uses Bootstrap 5, a completely different framework with its own class names, grid system, and component structure. This means that your existing Joomla 3 template cannot be transferred to Joomla 5 — it must be rebuilt or replaced.
Joomla 5 ships with the Cassiopeia template, a clean, accessible, responsive default template. Many organisations use Cassiopeia as a starting point and customise it to match their brand. Commercial template providers such as JoomlArt, JoomShaper, and YOOtheme also offer extensive Joomla 5 template libraries.
Administration Interface
The Joomla 5 administrator backend has been completely redesigned. The layout, navigation, and workflow are significantly different from Joomla 3. While the learning curve for existing Joomla administrators is manageable — the core concepts remain the same — it does require familiarisation. We provide guidance on the new interface as part of every migration.
Database Requirements
Joomla 3 supported MySQL 5.1 and above. Joomla 5 requires MySQL 8.0.13 or MariaDB 10.4 at minimum. Most modern hosting environments meet these requirements, but older shared hosting accounts may need to be upgraded. We verify server compatibility as the first step in every migration project.
Media Manager
Joomla 5 includes a completely new media manager with folder management, image editing, and improved file handling. Media files from your Joomla 3 installation transfer cleanly — the images directory structure is preserved during migration.
New Core Features
Joomla 5 introduces several features that were not available in Joomla 3, including guided tours for backend users, task scheduling, custom fields improvements, workflow publishing stages, child templates for safe customisation, and a mail template system. These features are available immediately after migration without requiring additional extensions.
The Migration Process: What to Expect
Migrating from Joomla 3 to Joomla 5 is a structured process that requires careful planning and execution. We follow a proven methodology refined through years of Joomla migration work.
Step 1: Comprehensive Site Audit
Before any migration work begins, we conduct a thorough audit of your existing Joomla 3 installation. This audit examines:
- Joomla version and configuration: Exact version number, PHP version, MySQL version, server environment, and hosting configuration.
- Extension inventory: Every component, module, and plugin installed on your site — active and inactive. For each extension, we determine whether a Joomla 5 compatible version exists, whether an alternative is available, or whether custom replacement development is required.
- Template analysis: Your current template structure, customisations, and any template overrides that need to be recreated in the new template.
- Content assessment: Volume of articles, categories, menu structures, media files, user accounts, and any custom database tables created by third-party extensions.
- SEO baseline: Current URL structure, metadata, redirects, and search engine indexation status — essential for preserving your search rankings during migration.
- Compliance status: Current GDPR compliance level, cookie handling, and accessibility against WCAG 2.1 criteria.
The audit results form the basis of your migration plan, timeline, and quotation. There are no surprises because we identify every potential issue before work begins.
Step 2: Migration Environment Setup
We create a complete copy of your Joomla 3 website in a secure staging environment. This staging site is where all migration work takes place — your live website continues to operate normally throughout the process. No visitor to your website will experience any disruption during migration.
Step 3: Pre-Migration Preparation
On the staging copy, we prepare your Joomla 3 installation for migration by updating it to the final Joomla 3.10.x release if it is not already current, updating all extensions to their latest Joomla 3 versions, removing unused or abandoned extensions, cleaning up the database, and resolving any existing errors or configuration issues.
Step 4: Core Migration
The actual Joomla migration is executed through a controlled process. Joomla 3 cannot upgrade directly to Joomla 5 — the migration passes through Joomla 4 as an intermediate step. We handle this multi-step process as a single managed operation, ensuring data integrity at each stage.
During the core migration, all content is preserved: articles, categories, tags, menu structures, user accounts, media files, and core configuration settings transfer to the new Joomla 5 installation.
Step 5: Extension Migration
After the core migration, we address each extension identified in the audit. Extensions fall into several categories:
- Direct upgrade available: The extension developer has released a Joomla 5 version. We install and configure it, migrating any extension-specific data.
- Alternative extension required: The original extension has been discontinued or does not support Joomla 5. We install a compatible alternative and migrate the data where possible.
- Custom development needed: For bespoke functionality that has no off-the-shelf alternative, we develop custom solutions that replicate the required features within the Joomla 5 architecture.
- No longer needed: Some Joomla 3 extensions provided functionality that is now built into the Joomla 5 core, or that is no longer relevant to your website. These are removed cleanly.
Step 6: Template Implementation
Your website's visual design is recreated for Joomla 5. Depending on the scope of your migration, this may involve customising the Cassiopeia default template, implementing a commercial Joomla 5 template, or building a custom template that matches your existing brand identity. We ensure the new template is fully responsive, meets accessibility standards, and performs well on all devices.
Step 7: SEO Preservation
Preserving your search engine rankings during a migration is critical. We handle this through comprehensive URL redirect mapping — every page on your old site is mapped to its corresponding page on the new site, with 301 redirects configured to ensure search engines and bookmarks continue to work. We also verify that metadata, canonical tags, robots directives, and sitemap configuration are correctly transferred.
Step 8: Testing
We test the migrated website thoroughly before it goes live. This includes functional testing of every page, form, and interactive element, cross-browser testing on current versions of Chrome, Firefox, Safari, and Edge, mobile responsiveness testing across multiple device sizes, performance testing and optimisation, and verification of all redirects and SEO elements.
You receive access to the staging site to review and test the migration yourself. We do not proceed to the live deployment until you confirm that the migrated site meets your requirements.
Step 9: Live Deployment
Once testing is complete and approved, we deploy the migrated site to your live environment. The switchover is carefully scheduled — typically during low-traffic hours — and takes only minutes. A complete backup of your original Joomla 3 site is preserved in case it is ever needed for reference.
Step 10: Post-Migration Support
Every migration includes a 30-day support period during which we monitor the site for any issues, resolve any problems that emerge, and make adjustments as needed. This period gives you and your team time to familiarise yourselves with the new Joomla 5 administration interface while knowing that immediate support is available.
Extension Compatibility: What Transfers and What Does Not
One of the most common concerns about migrating from Joomla 3 to Joomla 5 is extension compatibility. This concern is justified — not every Joomla 3 extension has a Joomla 5 equivalent, and the extensions that have been updated often work differently in the new version.
Here is the general landscape for commonly used extension categories:
Backup and security: Akeeba Backup, the most widely used Joomla backup solution, fully supports Joomla 5. Admin Tools and other security extensions from the same developer are also available.
Content management: K2, once the most popular content extension for Joomla, has been largely superseded by improvements in the Joomla core content system. Most K2 content can be migrated to native Joomla articles.
E-commerce: HikaShop offers full Joomla 5 support. VirtueMart has released Joomla 5 compatible versions. If your online shop runs on either platform, the transition is well-supported.
Forms: RSForm Pro and ChronoForms both support Joomla 5. Convert Forms is another strong option that integrates well with the modern Joomla architecture.
Email marketing: AcyMailing has been updated for Joomla 5 and continues to be actively developed, offering newsletter management, automation, and subscriber handling.
Community and forums: Kunena Forum supports Joomla 5. JomSocial and EasySocial have also released compatible versions.
Galleries and media: Phoca Gallery supports Joomla 5. Various slider extensions have Joomla 5 versions available, though some older slider plugins have been discontinued — modern alternatives with better performance are available.
Document management: DOCman by Joomlatools supports Joomla 5, providing file management and download tracking capabilities.
SEO: The Joomla 5 core includes improved SEO features, but extensions such as sh404SEF and 4SEF provide additional URL management and metadata control for sites that require advanced SEO handling.
Our site audit identifies every extension on your installation and provides a clear compatibility report before migration begins, so you know exactly what to expect.
Timeline and What Affects It
A straightforward Joomla 3 to 5 migration for a standard business website — typically with 10 to 20 extensions and a commercial template — can be completed within one to two weeks from approval to live deployment.
Complex migrations take longer. Factors that increase the timeline include:
- Large content volumes (thousands of articles, extensive media libraries)
- Custom components or bespoke functionality that must be rebuilt
- Multi-language installations with content in several languages
- Complex user management with multiple access levels
- E-commerce installations with product catalogues, order history, and customer data
- Extensive URL structures requiring detailed redirect mapping
- Third-party integrations (CRM systems, payment gateways, APIs)
We provide a specific timeline estimate as part of every project proposal, based on the findings of your site audit.
Pricing
Joomla 3 to 5 migration projects start from €1,200 for standard business websites. Complex migrations with custom components, e-commerce functionality, or multi-language configurations are quoted individually based on the scope identified in your site audit.
We provide fixed-price quotations after the audit — you know the exact cost before any paid work begins. There are no hourly surprises.
Every migration includes our 30-day post-migration support warranty at no additional cost.
What Happens After the Upgrade
A successful migration is the beginning of your website's next chapter, not the end of a project. To protect your investment, we recommend:
Ongoing maintenance: Joomla 5 receives regular updates — security patches, bug fixes, and minor feature releases. Keeping your site current requires structured maintenance including staged updates, extension monitoring, and regular backups. Learn about our maintenance plans →
Managed hosting: If your current hosting environment needed upgrades to support Joomla 5, consider our managed Joomla hosting on European servers. We optimise the server environment specifically for Joomla performance and handle infrastructure maintenance proactively. Learn about managed hosting →
EU compliance: Your migration is an ideal time to address GDPR compliance and European Accessibility Act requirements. We can integrate compliance measures into the migration process, saving time and ensuring your new Joomla 5 website meets its regulatory obligations from day one. Learn about GDPR compliance → | Learn about EAA compliance →
Frequently Asked Questions
Can Joomla 3 be upgraded directly to Joomla 5?
No. Joomla 3 cannot be upgraded directly to Joomla 5 through a single update. The migration passes through Joomla 4 as an intermediate step. We manage this multi-step process as a single project, handling all the technical complexity so that you experience a clean transition from Joomla 3 to Joomla 5.
Will I lose any content during the migration?
No. All core content — articles, categories, tags, menus, users, and media files — is preserved during migration. Extension-specific data is also migrated wherever the extension supports it. We verify content integrity as part of our testing process before the migrated site goes live.
What happens to my website's search rankings?
We implement comprehensive 301 redirect mapping as part of every migration to preserve your search engine rankings. Your existing URLs are redirected to their new equivalents so that search engines and visitors continue to reach the correct pages. We also verify metadata, sitemaps, and canonical tags to maintain your SEO foundation.
How long will my website be offline during migration?
Your website experiences zero downtime during migration. All work is performed on a staging copy while your live Joomla 3 site continues to operate normally. The final switchover takes only minutes and is scheduled during low-traffic periods.
Is Joomla 3 still safe to use?
No. Joomla 3 has not received security patches since August 2023. Known vulnerabilities are publicly documented, and community-provided patches only address some of them. Running Joomla 3 in production exposes your website and its users to increasing security risk.
Should I upgrade to Joomla 5 or Joomla 6?
Joomla 5 is the Long Term Support release, making it the most stable choice for organisations that value proven reliability. Joomla 6, released in October 2025, offers the latest features but with a younger extension ecosystem. We recommend Joomla 5 for most migrations and offer Joomla 3 to 6 migration for organisations that prefer to be on the latest version.
What if some of my extensions do not have Joomla 5 versions?
This is common and expected. During the site audit, we identify every extension and determine its Joomla 5 compatibility. For extensions without a direct upgrade path, we recommend alternatives with equivalent functionality, or develop custom solutions when necessary. You approve all replacement decisions before migration begins.
Do you support multi-language Joomla websites?
Yes. We regularly migrate multi-language Joomla installations, preserving content associations across languages and ensuring the language switching and SEO structure work correctly on the new platform. Our team works in multiple European languages, which allows us to verify translated content during testing.
What does the free site audit include?
Our free audit scans your Joomla 3 website and reports on the installed Joomla version, PHP and MySQL versions, the number and compatibility status of installed extensions, template compatibility, basic security assessment, GDPR compliance indicators, and accessibility against WCAG 2.1 criteria. You receive the report within 24 hours as a detailed document with clear recommendations.
Start Your Joomla 3 to 5 Migration
Every successful migration begins with understanding where your website stands today. Our free site audit gives you a clear, detailed picture of your Joomla 3 installation — what needs to change, what can transfer, and what the migration will involve.
Enter your website URL and receive your personalised audit report within 24 hours. No cost, no obligation, no sales pressure — just a clear technical assessment from Joomla specialists who have been doing this work since the platform began.