Moving a PHP or WordPress Website to Next.js Without Losing SEO

Should you move to Next.js at all?

Move when speed, security and flexibility matter more than plugin convenience: your site fails Core Web Vitals, you are tired of plugin and PHP updates, you want app-like features such as portals, calculators or bookings, or the site is a marketing site where every second of load time costs leads. Stay on WordPress if your team publishes daily, relies on many plugins with no simple replacement, and the site is fast and secure enough today.

There is also a middle path: keep WordPress as a headless CMS for editors, hidden from the public, and use Next.js for the public site. Editors keep the dashboard they know; visitors and attackers never touch PHP.

Step 1: crawl and inventory the old site

Crawl the current site with a tool such as Screaming Frog and export every URL, title, meta description, H1, canonical and status code. Export top pages and queries from Google Search Console and analytics. This tells you which pages earn traffic and links, and it becomes the checklist you test the new site against.

Step 2: keep URLs, or redirect every one that changes

The single biggest cause of lost rankings is changed URLs without redirects. Next.js lets you reproduce almost any URL structure, including WordPress-style /category/post-name/ paths and trailing slashes, so keep URLs identical where you can. Where a URL must change, such as old .php pages, add a permanent 301 redirect from each old URL to the closest new page in next.config. Never redirect everything to the homepage.

Google’s site-move guidance applies even when the domain stays the same: map every URL, redirect in one step without chains, update internal links, and submit the new sitemap.

Step 3: move content and on-page SEO

Carry over each page’s title tag, meta description, headings, body content, image alt text and internal links. Rebuild structured data (Organization, Article, Product, FAQ, Breadcrumb) as JSON-LD, which Next.js makes easy to generate from your content. Move images to optimised formats with next/image. If you move away from WordPress entirely, migrate posts, pages, categories and media into the new CMS with a script rather than by hand, so nothing is missed.

Step 4: launch and monitor

Before launch, test on staging: every old URL either loads the same page or redirects in one hop, titles and canonicals match the plan, and the sitemap and robots.txt are correct. After launch, submit the new sitemap in Search Console and watch coverage, 404s and rankings daily for two weeks and weekly for two months. A small, temporary fluctuation is normal; a sustained drop usually points to a missed redirect or lost content, which the monitoring catches early.

Timeline and cost

A business website of 10 to 50 pages typically takes 2 to 6 weeks including content migration and SEO checks. A blog with hundreds of posts, a WooCommerce store or a PHP web application with logins takes longer and is phased. WebsNexus website rebuilds start from $500, and sites with portals or a backend from $1,500, with a fixed quote after we review the current site.

We have migrated WordPress and PHP sites to Next.js while keeping their URLs and rankings, and this website is built on Next.js itself. Message us on WhatsApp at +92 326 6379003 with your current site address for a free assessment.