Drupal to Sanity Migration Guide

Drupal has powered enterprise content for two decades, but many teams are discovering that its monolithic, PHP-and-Twig architecture is holding back the fast, omnichannel front ends they now need to ship. If your editors are frustrated by the admin theme, your developers are wrestling with contrib module conflicts, and your marketing team wants a React or Next.js storefront that Drupal's rendering layer cannot cleanly deliver, a move to Sanity is worth serious consideration.

Sanity is a headless, API-first content platform built around a real-time document store and a fully customizable editing environment (Sanity Studio) written in React. Migrating from Drupal to Sanity is less a like-for-like port and more a re-architecture: you separate the content repository from the presentation layer, model your content as portable structured documents, and consume it over an API from whatever front end you choose. This guide walks through the strategy, the architecture shift, the content modeling, and a step-by-step migration that protects your hard-won SEO equity.

Why Move From Drupal to a Headless CMS

Drupal's coupling of content and presentation was a strength in 2010 and is a constraint today. Every field, view, and node is entangled with a theme layer, so front-end teams cannot iterate freely without touching the CMS. Contrib and custom modules drift out of sync during major-version upgrades, and the notorious Drupal 7-to-9-to-10 migrations have taught many organizations that staying current is a recurring capital expense.

Going headless with Sanity decouples these concerns. Your content becomes a clean, versioned dataset queried through an API, and your front end becomes a standalone application deployed on modern infrastructure like Vercel or Netlify. The practical wins are concrete:

• Performance: statically generated or edge-rendered pages replace PHP round-trips, cutting Time to First Byte dramatically.
• Omnichannel reuse: the same content feeds a website, a mobile app, and digital signage without duplication.
• Editor experience: Sanity Studio offers real-time collaboration, live previews, and custom input components that Drupal's form API struggles to match.
• Lower maintenance: Sanity's hosted Content Lake removes the server, database, and security-patching burden that Drupal imposes.

If you are still weighing the trade-offs, our breakdown of headless CMS versus traditional CMS covers where a decoupled model helps and where a monolith still makes sense.

Understanding the Decoupled Architecture

In Drupal, a request hits the PHP application, which loads nodes from MySQL, runs them through the theme layer, and returns fully rendered HTML. Sanity inverts this. Your content lives in the Content Lake, a hosted document database, and is fetched by a separate front end using GROQ (Sanity's query language) or GraphQL. Sanity Studio, the editing interface, is itself just another API client that you host wherever you like.

This means three moving parts replace Drupal's single stack: the Content Lake (your data), Sanity Studio (editing), and your front-end framework (delivery). Content is delivered as JSON, so rich text is no longer HTML blobs but Portable Text, a structured array format that stays presentation-agnostic and renders identically across React, Vue, or native platforms. Understanding this shift early prevents the common mistake of trying to migrate rendered HTML verbatim instead of remodeling it as structured data. For teams that need bespoke editorial workflows or integrations with existing systems, this is also where custom development work ties the new stack into your CRM, DAM, or e-commerce backend.

Content Modeling and API Setup

The heart of a successful migration is translating Drupal's content types into Sanity schemas. Every Drupal content type (Article, Page, Landing Page) becomes a Sanity document type defined in code, and every Drupal field maps to a Sanity field with an explicit type. Start by auditing your Drupal structure with drush or the Field UI, listing each content type, its fields, and their cardinality.

Map the field types deliberately:

• Drupal text (formatted) and body fields become Sanity Portable Text arrays, not plain strings.
• Drupal taxonomy terms become referenced documents using Sanity's reference type, preserving relationships.
• Drupal image and file fields become Sanity image and file assets uploaded to the Content Lake CDN.
• Drupal entity references (node-to-node links) become Sanity references, keeping your content graph intact.
• Drupal Paragraphs map cleanly to Sanity's array-of-objects pattern for flexible page building.

Define these schemas in your Studio project, then spin up the API. Sanity gives you a project ID and dataset (typically production), and you generate a write token with the CLI for the import step and a read token for your front end. Configure CORS origins for your front-end domains before you deploy. Getting the schema right upfront is the single biggest determinant of how smooth the data transfer will be.

The Step-by-Step Migration

With schemas in place, the actual migration follows a repeatable extract-transform-load pipeline. This is the core engineering work, and treating it as a scripted, re-runnable process rather than a one-time manual export saves enormous pain when you need to re-sync content before cutover.

• 1. Extract from Drupal. Enable the JSON:API module (core since Drupal 8.7) and pull every content type through its REST endpoints, or export directly from the database with drush. JSON:API is preferable because it resolves references and gives you clean, paginated JSON.
• 2. Transform the data. Write a Node.js script that reshapes each Drupal entity into a Sanity document. The critical step here is converting Drupal's HTML body fields into Portable Text using a tool like @sanity/block-tools with an HTML deserializer. Assign each document a stable _id derived from the Drupal node ID so references resolve and re-imports are idempotent.
• 3. Handle assets. Download every image and file from Drupal's /sites/default/files directory and upload them to Sanity with the client's assets.upload() method, then swap the URLs in your documents for the returned asset references.
• 4. Load into Sanity. Batch your transformed documents into NDJSON and import them using the Sanity CLI (sanity dataset import) or the JavaScript client's transaction API. Import into a staging dataset first, never straight to production.
• 5. Validate. Compare document counts, spot-check rich text rendering, and confirm every reference and image resolves inside Studio before you build the front end against it.

This kind of structured, staged cutover is exactly what our website migration services are built around, and offloading the pipeline engineering to a specialist team is often faster and safer than building it in-house for a one-off move.

Preserving SEO Through the Cutover

A platform change is the moment most sites lose rankings, and the losses are almost always avoidable. Because your URL structure, rendering method, and metadata handling all change at once, you must plan SEO preservation as a first-class workstream, not an afterthought.

The non-negotiables:

• Preserve or redirect every URL. Crawl your live Drupal site, export the full URL inventory, and build a one-to-one 301 redirect map for any paths that change. Implement these as server-side 301s in your front-end framework or hosting layer.
• Migrate metadata as content. Drupal's Metatag module fields (title, description, canonical, Open Graph) must become Sanity fields so editors keep control and your front end can render them into the document head.
• Match rendering to crawlability. Use static generation or server-side rendering in Next.js or Nuxt so search engines receive fully rendered HTML, not a client-only shell.
• Regenerate the XML sitemap and update robots.txt to point at the new structure.

Work through a complete website migration SEO checklist before and after launch, and keep Google Search Console open during the first weeks to catch crawl errors, redirect chains, and coverage drops while they are still cheap to fix.

Launching With Confidence

A Drupal-to-Sanity migration is a genuine re-platforming, but it is a well-trodden path. The teams that succeed treat it as three disciplined phases: model the content faithfully, script an idempotent ETL pipeline you can run repeatedly, and protect SEO with redirects, structured metadata, and server-rendered output. Do those three things and you emerge with a faster site, happier editors, dramatically lower maintenance overhead, and content that is finally free to power any channel you build next. The monolith served its purpose; a headless, API-first architecture is what carries your content forward.