How to Handle Redirects During a Website Migration

How to Handle 301 Redirects During a Website Migration

Website migrations often involve more than moving content from one design to another.

A redesign may change page names, URL structures, navigation, product categories, content hierarchy, or even the domain itself. When this happens, old URLs that were previously indexed by search engines may no longer exist in the same form.

If those URLs are not handled properly, users can land on broken pages, external backlinks can lose their destination, and search engines may struggle to understand where the old content has moved.

This is where 301 redirects become important.

A redirect strategy helps preserve continuity between the old website and the new one, especially when existing pages already have search visibility or inbound links.

1. Why Redirects Matter During a Website Migration

During a migration, one of the biggest risks is changing URLs without creating a clear path from the old location to the new one.

For example, an old service page might use:

/services/web-development

while the new website uses:

/solutions/web-development

Without a redirect, anyone visiting the old URL may see a 404 page.

The same issue can affect search engines. If the old URL was already indexed, the search engine needs a clear signal that the content has permanently moved.

A properly configured redirect helps connect the old page with its new destination instead of treating the new URL as completely unrelated content.

Redirects are especially important when a website changes its domain, page URLs are renamed, categories are reorganised, multiple pages are merged, HTTP URLs move to HTTPS, or old sections are consolidated.

The goal is not to redirect every page automatically. The goal is to create the most relevant connection between the old URL and the new structure.

2. Use 301 Redirects for Permanent URL Changes

A 301 redirect indicates that a URL has permanently moved to another location.

For most permanent website migrations, this is the redirect type that should be considered when an old page has a clear replacement.

For example:

/old-product-page

can redirect to:

/products/new-product-page

This tells browsers and search engines that the original URL should now resolve to the new destination.

A 302 redirect, by comparison, generally represents a temporary move. It can be useful in specific situations, but it is usually not the first choice when a migration permanently changes the website structure.

The important part is not simply choosing 301 instead of 302.

The destination also needs to make sense.

Redirecting a discontinued product page to a closely related replacement is usually more useful than sending it to the homepage.

A redirect should preserve the intent of the original page wherever possible.

3. Create a Redirect Map Before Launch

Redirect planning should happen before the new website goes live.

A practical approach is to create a simple redirect map that pairs each important old URL with its new destination. This can be managed in a spreadsheet or migration document during development.

For example, an old service page such as /services/design may move to /solutions/web-design, while an outdated product page may need to redirect to a newer replacement.

If no relevant destination exists, it may be better to leave the page as a proper 404 or 410 rather than forcing it to an unrelated page.

This becomes especially important on larger websites with hundreds or thousands of URLs.

Trying to identify redirects only after launch can lead to missed pages, broken links, and inconsistent routing.

Before migration, it is useful to collect existing URLs from the current sitemap, analytics data, search performance tools, CMS exports, and backlink reports.

Priority should usually be given to pages that already receive traffic, rank in search results, or have external links pointing to them.

4. Avoid Redirect Chains and Irrelevant Redirects

Redirects can also become inefficient when they are layered on top of older redirect rules.

For example:

URL A → URL B → URL C

This is known as a redirect chain.

A cleaner setup would normally send URL A directly to URL C.

Long redirect chains can create unnecessary requests, slow down navigation, and make migration logic harder to maintain.

Another common issue is redirecting every removed page to the homepage.

This may seem like an easy solution, but it does not always provide a meaningful destination.

If a user expects a specific technical document, product page, or service page and is redirected to a general homepage instead, the experience can be confusing.

Search engines may also treat unrelated redirects differently from genuine page replacements.

When no relevant replacement exists, keeping a proper 404 or 410 response may sometimes be more appropriate than forcing an unrelated redirect.

5. Check Redirects After the Migration

Redirect implementation should always be tested after launch.

A migration may look correct visually while still containing technical issues behind the scenes.

Important checks include confirming that old URLs return the intended 301 status, redirect destinations load successfully, redirect loops do not exist, and redirect chains are kept to a minimum.

It is also important to review internal links, canonical tags, XML sitemaps, crawl settings, and unexpected 404 responses.

Internal links are often overlooked during this stage.

Even if an old URL redirects correctly, the new website should ideally link directly to the final destination rather than relying on redirects internally.

Redirects are mainly there to handle legacy URLs, external links, bookmarks, and search engine history.

They should not become a permanent substitute for clean internal linking.

Final Thoughts

A website migration is not complete simply because the new pages are online.

If URLs have changed, the relationship between the old structure and the new one needs to be planned carefully.

A good redirect strategy should identify valuable legacy URLs, map them to relevant new destinations, minimise redirect chains, and verify the results after launch.

Handled properly, 301 redirects help create a smoother transition for both users and search engines.

Handled poorly, they can turn a visually successful redesign into a migration filled with broken links, lost traffic, and unnecessary SEO problems.

For larger website migrations, redirect planning should be treated as part of the migration architecture itself rather than as a final task added just before launch.