Complete URL Inventory
Every indexed URL, including ones not in the CMS and ones nobody remembered.
A migration can go perfectly well technically and still cost a business its search visibility, because the URLs changed and nothing pointed the old ones at the new. Website migration services should begin with a complete URL inventory and a redirect map, before anyone discusses the new platform.
Every migration failure we have seen traces back to URLs that changed without redirects.
Every indexed URL, including ones not in the CMS and ones nobody remembered.
Each old URL to its closest equivalent, not everything to the homepage.
The redirect map tested on staging rather than discovered in production.
A page that lost half its content loses its rankings even with the URL intact.
Errors, coverage and traffic watched for weeks, not checked once.
Four things, in rough order of how much damage they do.
Discuss Your Migration →A new platform imposes a new structure, and every old URL becomes a 404.
Pages that do not fit the new templates get trimmed, losing what made them rank.
Redirects pointing at other redirects, accumulated over successive migrations.
A noindex or blocking robots file that travelled with the site to production.
Inventory, mapping, execution and the monitoring afterwards.
The search-side detail is covered in SEO migration.
Inventory, map, verify, launch, monitor. Verification is the step most often skipped.
Every URL that exists, from every available source.
One-to-one to the closest equivalent, reviewed by hand where it matters.
New site with content parity checked page by page.
Every mapped redirect tested before launch.
Errors and coverage watched daily for the first weeks.
It is the fastest way to produce a redirect map and it discards most of the value.
Search engines treat a redirect to an irrelevant page much as they treat a 404. The signals the old page accumulated do not transfer to a homepage that does not cover the same subject.
Visitors following a link to a specific page also arrive somewhere generic, and most leave rather than searching the new site for what they wanted.
A one-to-one map to the nearest equivalent preserves both. Where no equivalent exists, the honest answer is a 404 or a relevant category page — not the homepage.
The CMS knows about the pages it manages. It does not know about old PDFs, landing pages built outside it, campaign URLs, or pages from a previous site that are still being redirected.
Combining sources finds them: analytics for anything that received traffic, search data for anything indexed, server logs for anything requested, and the existing redirect rules for anything already being caught.
The existing rules matter particularly, because a site on its second migration frequently has old redirects doing real work that would be lost if only current URLs were considered.







Website migration services move a site to a new platform, structure or domain while preserving its URLs, content and search visibility — through URL mapping, redirects and verification.
Some fluctuation is normal while search engines process the change. Sustained loss usually indicates URLs that changed without redirects, or content that was reduced. Both are preventable and neither is inevitable.
Often yes, and it is worth insisting on where the current structure is reasonable. Many platforms allow custom URL patterns; accepting the platform default is a choice, not a requirement.
It varies with site size and how much changed, and nobody can give a reliable figure in advance. What is clear is that a clean migration with complete redirects recovers faster than one where redirects are added afterwards.
An incomplete URL inventory. Redirects get built from the CMS page list, which misses PDFs, campaign pages and URLs from a previous migration — all of which become 404s on launch day.
Still deciding if website migration services is right for you?
Talk to UsRedirect maps get built from a list of pages exported from the current CMS. It is the obvious source and it is systematically incomplete.
It does not include the PDF that ranks for a technical query, the landing page an agency built on a subdomain years ago, or the redirects already in place from the last migration — many of which are still receiving real traffic.
Those URLs go quietly to 404 on launch day, and because nobody knew they existed, nobody notices the traffic that stopped arriving.
Tell us what you are moving from and to. We will inventory the URLs that exist and identify what a migration would put at risk.
