Changing your website’s content management system can feel like a major undertaking. A new CMS can make it easier to update content, improve website performance, strengthen security, and give your team more control over the site. However, moving an established website from one platform to another involves much more than copying pages from one system to another.

A poorly planned CMS migration can lead to broken links, missing content, indexing problems, slow page speeds, lost search rankings, and frustrated visitors. A carefully planned migration, on the other hand, can give your website a cleaner foundation while preserving the value you have already built.

For businesses considering a website redesign or platform upgrade, understanding how to migrate a website properly is an important part of the web design process. Whether you operate a small business website, an e-commerce store, or a growing corporate website, the following steps can help make the transition to a new CMS considerably smoother.

Why Businesses Decide to Change Their CMS

There are many reasons a business may outgrow its existing content management system.

An older CMS may be difficult to update or require technical knowledge for relatively simple changes. Another platform may offer better integrations, improved security, more flexible design options, or easier content management.

Common reasons for switching CMS platforms include:

• The current system is outdated
• Website management has become too complicated
• The business needs better e-commerce capabilities
• The website needs a more flexible design
• Page speed and performance need improvement
• The current CMS has limited integrations
• Multiple employees need easier access to content
• Security and maintenance have become concerns
• The website needs to accommodate future growth

A CMS migration is also sometimes part of a larger website redesign. In that situation, the migration should not be treated as an afterthought. The platform, website structure, content, design, SEO, and functionality all need to work together.

Start With a Complete Website Inventory

Before moving anything, determine exactly what you already have.

This is one of the most important steps in a successful CMS migration because websites often contain far more content than business owners realize. A site may include service pages, blog posts, landing pages, images, downloadable files, forms, redirects, category pages, and other resources.

Create an inventory of important website assets, including:

• Main website pages
• Blog posts
• Product pages
• Categories and tags
• Images and media
• PDFs and downloadable resources
• Contact forms
• Customer account areas
• Internal links
• External links
• Metadata
• Existing redirects
• Analytics tracking
• Search engine verification codes
• Third-party integrations

This inventory gives you a reference point for the migration.

It also provides an opportunity to clean up the website. You may discover old pages that no longer serve a purpose, outdated blog posts, duplicate content, or resources that should be consolidated rather than transferred exactly as they are.

Document Your Existing URL Structure

Your URLs are particularly important when moving to a new CMS.

Changing URLs unnecessarily can create problems for users and search engines. If a page currently receives traffic, has backlinks, or has accumulated authority over time, you want to preserve its value whenever possible.

For every important URL, record:

• Current URL
• Page title
• Meta description
• Primary topic or keyword
• Current status
• New URL, if changing
• Recommended redirect
• Internal links pointing to the page

A URL mapping spreadsheet can be extremely useful during the migration.

For example, if your current website has:

/website-design-services/

and the new website will use:

/services/website-design/

you should document that change and establish a permanent redirect from the old URL to the new one.

Do not assume that redirects will automatically happen simply because the new website contains similar content.

Back Up the Existing Website

Never begin a major CMS migration without a reliable backup.

Ideally, you should have multiple copies of important website data before making substantial changes. Depending on the website, this may include the database, uploaded media, configuration files, theme files, plugins, product information, customer data, and other application-specific information.

The backup gives you a safety net if something goes wrong.

It is also worth confirming that the backup can actually be restored. Having a backup file is not the same thing as having a functioning recovery strategy.

Choose the New CMS Based on Your Long-Term Needs

The best CMS is not necessarily the one with the most features.

Instead, choose a platform that fits the way your organization actually operates.

Consider questions such as:

• Who will manage the website?
• How frequently will content be published?
• Will multiple people need access?
• Does the website sell products online?
• What integrations are required?
• How much customization will be necessary?
• How important is scalability?
• What level of technical support is available?
• How will security updates be handled?
• What types of content will be added in the future?

A small local business may have very different requirements from an organization with hundreds of products and multiple content teams.

Thinking about future requirements is particularly important. Migrating to another CMS every few years can be expensive and disruptive, so the new platform should have enough flexibility to support the business as it grows.

Plan the New Website Structure Before Migrating Content

A CMS migration is an excellent opportunity to improve your website architecture.

Instead of simply copying the old website into a new platform, look at how the information is organized.

Ask yourself:

Can visitors quickly find important information?

Are related pages logically connected?

Are services, products, and educational resources separated clearly?

Is there a logical hierarchy between major pages and supporting content?

A strong website structure can make navigation easier while also helping search engines understand the relationship between pages.

For example, a website design company might organize its content into major sections such as services, website design process, e-commerce solutions, and educational resources. Supporting articles can then link naturally to the appropriate service pages and related articles.

This creates a useful internal linking structure instead of leaving individual blog posts isolated.

Preserve Important Content and Metadata

Moving content does not simply mean copying the visible words on each page.

Important information can exist behind the scenes.

During a CMS migration, pay attention to:

• Page titles
• Meta descriptions
• Heading structure
• Image alt text
• Canonical URLs
• Open Graph information
• Structured data
• Categories
• Tags
• Author information
• Publication dates
• Embedded media

If valuable SEO information disappears during the migration, the new website may perform differently even when the visible page content looks identical.

This is one reason CMS migrations should involve someone who understands both website development and SEO.

Handle URL Redirects Carefully

Redirects are one of the most critical technical elements of a website migration.

When an old URL is replaced by a new URL, a permanent redirect can tell browsers and search engines where the content has moved.

Create redirects for important URLs that have changed rather than sending visitors to generic pages.

For example, if an old article about responsive web design has moved to a new URL, redirect the old article directly to its new equivalent.

Avoid redirecting hundreds of unrelated pages to the homepage simply because it is convenient. Visitors arriving at the homepage may not find what they expected, and the migration can lose valuable contextual connections between old and new pages.

Update Internal Links

Redirects are important, but you should still update internal links whenever possible.

Suppose 50 articles on your website link to an old URL. If that URL now redirects to another location, those links may technically continue to work, but the website is carrying unnecessary redirect paths.

Update internal links so they point directly to the current URLs.

This creates a cleaner site architecture and makes it easier for visitors and search engine crawlers to move through the website.

It also gives you an opportunity to strengthen your internal linking strategy.

Related articles should connect naturally to one another, while informational content can link to relevant service pages where appropriate.

Test the New CMS Before Launch

Do not launch the new website immediately after the migration is complete.

Create a staging environment whenever possible and test the website thoroughly.

Check:

• Navigation menus
• Contact forms
• Search functionality
• Login systems
• Shopping carts
• Checkout processes
• Payment integrations
• Images
• Videos
• Downloads
• Mobile layouts
• Buttons
• Internal links
• External links
• Redirects
• Page titles
• Meta descriptions
• Structured data
• Analytics
• Tracking scripts

Forms deserve particular attention because they can appear to work while failing to deliver submissions properly.

For e-commerce websites, test the entire purchasing process from product selection through checkout and confirmation.

Test the Website on Mobile Devices

A website migration can introduce responsive design problems that were not present on the old platform.

Review the new website on smartphones and tablets as well as desktop computers.

Look for issues such as:

• Text that is difficult to read
• Buttons that are too small
• Menus that do not open correctly
• Images extending beyond the screen
• Slow-loading pages
• Forms that are difficult to complete
• Checkout problems
• Excessive scrolling

Mobile usability is especially important for businesses that receive a significant portion of their visitors from smartphones.

Monitor Website Performance

A new CMS should not automatically be assumed to be faster.

Performance depends on hosting, code, images, scripts, plugins or extensions, databases, caching, and many other factors.

Before launch, establish a baseline for your existing website. Then compare the new website against it.

Pay attention to:

• Page loading times
• Server response
• Image sizes
• JavaScript
• CSS
• Caching
• Mobile performance
• Core Web Vitals

If the new platform introduces unnecessary features or poorly optimized components, the migration could actually make the website slower.

Check Search Engine Visibility After Launch

The work does not end when the new website goes live.

Monitor the website closely after launch.

Look for:

• Unexpected indexing changes
• Crawl errors
• Missing pages
• Broken links
• Incorrect redirects
• Traffic declines
• Pages disappearing from search results
• Duplicate URLs
• Incorrect canonical tags
• Sitemap problems

Keep the old URL list available during this monitoring period so you can quickly investigate unexpected changes.

It is also a good idea to submit the updated XML sitemap through the appropriate search engine tools and verify that important pages remain accessible to crawlers.

Keep the Old Website Available Temporarily

Once the new website is live, there can be a temptation to immediately delete everything associated with the old website.

That can make troubleshooting much harder.

Depending on your hosting and development setup, retaining an appropriate backup or archived copy of the previous website can make it easier to compare pages, recover missing content, or identify differences.

The old website should not necessarily remain publicly accessible, however. Duplicate versions of the same website can create their own problems.

The goal is to retain a secure reference copy rather than create two competing websites.

Monitor Traffic and Rankings After Migration

Expect to spend time monitoring the website after launch.

Even a carefully executed migration can reveal unexpected issues.

Compare important metrics before and after the migration, including:

• Organic traffic
• Search impressions
• Search clicks
• Rankings
• Indexed pages
• Conversion rates
• Contact form submissions
• E-commerce transactions
• Page performance
• User engagement

Do not panic over every short-term fluctuation. Search engines may need time to process significant website changes.

However, a sudden and sustained drop in organic visibility should be investigated quickly.

Common CMS Migration Mistakes to Avoid

Some migration problems happen repeatedly because businesses focus heavily on the visual redesign and overlook the technical details.

Changing Every URL

There is rarely a need to change every URL simply because the CMS is changing. Keep established URLs where practical.

Forgetting Redirects

Old URLs that disappear without proper redirects can create broken experiences and potentially lose valuable search visibility.

Migrating Without a Backup

A backup should be part of the preparation process, not something you think about after something goes wrong.

Ignoring Mobile Design

A beautiful desktop website can still provide a poor experience on smaller screens.

Failing to Test Forms

A website can look perfect while quietly losing leads because its contact forms are not working correctly.

Moving Content Without Reviewing It

A migration is an opportunity to improve content. Do not automatically carry every outdated page into the new CMS.

Launching Without Monitoring

A website migration should be treated as a process rather than a single launch-day event.

Make Your CMS Migration an Opportunity, Not Just a Platform Change

Moving to a new content management system is a substantial project, but it can also be an opportunity to improve the entire website.

You can simplify navigation, clean up outdated content, strengthen internal linking, improve page speed, modernize the design, improve mobile usability, and create a more manageable content workflow.

The key is preparation.

A successful CMS migration begins long before the new website goes live. Inventory the existing website, map URLs, back up your data, select the right platform, preserve valuable SEO elements, test the new site thoroughly, and monitor performance after launch.

For businesses in St. Louis, a CMS migration can also be a chance to build a website that better reflects the needs of local customers while providing a stronger foundation for future growth. Whether you’re replacing an outdated system or moving to a platform capable of supporting a larger business, careful planning can turn a potentially disruptive project into a meaningful improvement.

The goal should not simply be to put your existing website on a different CMS. The goal should be to create a faster, easier-to-manage, more secure, and more effective website that is prepared for what comes next.

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