Technical Diagnostic
A focused review of affected routes, templates, deployment behaviour, crawl signals, CMS behaviour, performance bottlenecks, or code paths, followed by a prioritised fix plan the team can take into delivery.
Planning a Move to Next.js
Migration work starts with what must survive the move, not with a new component library. Before choosing templates or routing patterns, the current estate needs a clear inventory of URLs, redirects, content ownership, metadata, analytics, CMS workflows, performance constraints, and the pages carrying commercial risk.
Plan a move to Next.js by identifying which routes, redirects, rendered output, metadata, CMS workflows, analytics, performance paths, and release controls must survive the cutover.
Short Answer
A Next.js migration is risky when the new front end looks ready but the old platform's route contracts, content behaviour, crawler‑visible output, workflow assumptions, and release controls have not been carried across. A migration is not mainly a front‑end rebuild. It is a route, content, signal, workflow, and release‑risk preservation exercise, with child plans for the source platform that is actually being replaced.
Why It Matters
During a Next.js migration, I help commercial and delivery teams keep search visibility, editorial continuity, and release confidence intact whilst routes, templates, metadata, and publishing workflows change underneath.
Common Situations
- Replacing a legacy SPA, CMS front end, commerce front end, or hard‑to‑maintain site where routes and content behaviour must remain commercially safe.
- Choosing the right migration route before platform‑specific details from WordPress, Drupal, Gatsby, Shopify, Contentful, or a React SPA turn into one oversized rebuild.
- Preserving URLs, redirects, metadata, rendered HTML, structured data, CMS workflow, analytics, performance, and release confidence during cutover.
- At Nando’s, migration planning had to treat URL policy, release risk, technical SEO, structured data, and content operations as part of the same launch path.
Choose the source platform or migration shape that is closest to the current estate. This hub defines the launch‑risk model; the child pages handle the platform‑specific failure modes.
What I Look at First
- I start with the current URL inventory, target route model, redirect plan, canonical policy, metadata parity, rendered HTML, structured data, internal links, sitemap, and robots setup, analytics, Search Console baselines, CMS dependencies, release sequencing, and rollback path.
- The Website Replatforming Risk Register helps separate source‑platform risk from general launch risk before implementation starts.
- The Rendered HTML Migration Comparison Worksheet is useful when the risk sits in template output, crawler‑visible content, metadata, schema, links, or CMS‑driven page data rather than only in route mapping.
What Usually Changes
- URL, route, template, content, and publishing dependencies are mapped before the platform changes.
- Redirect, canonical, metadata, schema, sitemap, and crawl risks are identified before launch.
- CMS, preview, build, and deployment behaviour are compared across the old and new stack.
- Launch actions are prioritised by visibility, revenue exposure, and delivery risk.
- The team has a migration plan that reduces avoidable search and release damage.
How This Usually Works
Embedded Delivery Support
Senior hands‑on support inside an existing team where architecture, implementation, review, and delivery judgement all matter, especially when the work cannot be handed over as isolated tickets.
Fractional Technical Leadership
Ongoing senior technical cover for architecture, roadmap, supplier review, delivery risk, hiring shape, and platform‑ownership decisions when the team is not ready to hire permanently.
This May Not Be the Right Fit If
- You already have a tested route, redirect, content, and release plan and only need extra hands to execute it without challenge. If the plan still needs senior delivery judgement inside the team, Embedded Technical Leadership may be a better fit.
- The migration is expected to ignore search visibility, preview trust, content operations, or release risk until after launch. If search visibility is already the main problem, Technical SEO Recovery and Debugging is the better route.
Related Case Studies and Project Work
More Specific Service Pages
React SPA to Next.js Migration
Move a client‑rendered React SPA to Next.js when search‑critical routes need stable rendered HTML, metadata, links, and performance earlier than the current shell can provide.
WordPress to Next.js Migration
Plan a WordPress‑to‑Next.js migration without losing legacy URL behaviour, plugin or theme SEO rules, media paths, taxonomies, preview trust, or editorial continuity.
Gatsby to Next.js Migration
Move off Gatsby when build stages, plugin dependencies, data‑source coupling, image pipelines, and preview constraints are now slowing publishing and platform maintenance.
Contentful to Sanity Migration
Move a Contentful‑backed Gatsby or Next.js site to Sanity without losing content meaning, references, rich text, assets, slugs, locales, metadata, preview, or editorial control.
Shopify to Next.js Headless Commerce
Move beyond a Shopify theme only when the boundary is clear between what Shopify keeps owning and what Next.js should take over for the storefront.
Drupal to Next.js Migration
Move a Drupal‑led estate to Next.js without flattening aliases, content types, taxonomies, media, permissions, preview needs, SEO fields, or editorial workflow into generic CMS data.
Pages Router to App Router Migration
Move a mature Next.js codebase to the App Router without turning caching, rendering, middleware, or rollout changes into launch risk.
Related Services
Next.js Platform Consulting
Senior diagnosis for existing React and Next.js estates where routing, CMS, deployment, SEO, data ownership, and delivery risk have become one platform problem.
Technical SEO for JavaScript Applications
Preventative, engineering‑led SEO for React and Next.js sites where rendered HTML, indexable text, metadata, canonicals, links, structured data, and AI extractability have to be reliable before visibility is damaged.
Headless Architecture Consulting
Headless architecture advice before CMS, content model, preview, revalidation, metadata, schema, media, localisation, and editorial ownership decisions become expensive to reverse.
Performance Optimisation and Core Web Vitals
Route‑level performance work for modern front ends where field data, Core Web Vitals, scripts, fonts, images, data loading, or templates are weakening important user journeys.
Related Technical Articles
Technical SEO Launch Criteria for a Next.js Migration. Technical SEO Launch Criteria for a Next.js Migration
Technical SEO launch criteria for Next.js migrations, covering URLs, redirects, canonicals, metadata, rendered HTML, schema, sitemaps, and recovery.
How to Compare Rendered HTML Before and After a Migration. How to Compare Rendered HTML Before and After a Migration
Compare rendered HTML before and after a migration, checking headings, metadata, links, schema, body copy, media, crawl signals, and launch risk.
React SPA to Next.js Migration Checklist for SEO and Indexing. React SPA to Next.js Migration Checklist for SEO and Indexing
A React SPA to Next.js SEO migration checklist for preserving indexing, redirects, metadata, rendered HTML, internal links, crawl paths, and launch confidence.
WordPress to Next.js Migration Checklist for Content, Preview and SEO. WordPress to Next.js Migration Checklist for Content, Preview and SEO
A WordPress to Next.js migration checklist for URLs, content models, media, preview, redirects, metadata, schema, sitemaps, SEO, and launch checks.
Should You Move a Shopify Storefront to Next.js? Should You Move a Shopify Storefront to Next.js?
Decide whether Shopify to Next.js is worth it by weighing storefront control, SEO, performance, checkout, apps, content workflow, cost, and risk.
Pages Router to App Router Migration Risk Checklist. Pages Router to App Router Migration Risk Checklist
A Pages Router to App Router migration checklist for Next.js teams, covering routing, data fetching, caching, metadata, server components, and rollout.