How can I move a website from Drupal to WordPress without affecting the Google ranking?

The issue is that my client is already on the first page on Google, they are moving their site from Drupal to lovely WordPress and don't want to lose their top ranking.

Is there anything I can do to avoid this? I am new to this so would really appreciate some help.


Google does not care which backend you use.

If you keep exactly the same content, frontend (i.e., same HTML, CSS, JS etc.) and URLs, search engines wouldn’t even notice that you switched to a different system.

While such a migration (without content/frontend/URL changes) would be ideal, it’s not necessary. The most important things are that you migrate all your content (without changing/restructuring too much) and keep all your URLs. If keeping the URLs is not possible, you should at least redirect them (with 301).

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