What happens to your content when you move to a headless CMS

When businesses start exploring a move from WordPress to a headless CMS, the conversation usually focuses on performance, flexibility, and frontend technology. Those are all valid reasons to make the switch.

But the question that doesn't come up early enough is: what happens to all our existing content?

The answer isn't complicated, but it does require planning. Content migration is one of the most underestimated parts of a headless CMS project, and when it's rushed or ignored, it creates problems that show up months after launch.

Here's what the process actually looks like.

Your content doesn't just copy across

In WordPress, most content lives in a single rich-text editor, one big block of HTML per page or post. Headings, images, lists, and custom layouts are all mixed together in that one field.

A headless CMS works differently. Content is structured into discrete fields: a title field, a subtitle field, a body field, an image field with alt text, a CTA block with its own heading and link. Each piece of content has its own place.

This is what makes a headless CMS powerful, structured content can be delivered to a website, an app, a digital display, or anything else that calls the API. But it means your existing WordPress content needs to be unpacked and reorganised to fit the new structure.

That's not a five-minute job. It's a deliberate process that needs to happen alongside the build, not after it.

The content model comes first

Before any content moves, the first step is defining the content model, the structure of fields and blocks that your content will live in.

This is a collaborative process between your team and your developer. It involves decisions like: What types of content do you publish? What fields does each type need? What's reusable across pages and what's unique? Do you need flexible layout blocks, or is a fixed structure fine?

Getting this right upfront saves significant time later. A well-designed content model means your team can update and publish content confidently without touching code. A poorly designed one means constant developer involvement for routine changes.
For more on how headless CMS content structures work and when they make sense, see our headless CMS guide.

Migration options: Manual vs. Automated

For small sites, under 30 pages, manual migration is usually the most practical approach. Your team or your developer reviews each page, maps the content to the new structure, and enters it into the headless CMS. It's hands-on, but it's also an opportunity to review and improve content that may be outdated.

For larger sites, 50+ pages, hundreds of blog posts, or complex content types, automated migration scripts can extract content from WordPress and map it to the new CMS structure. This is faster but requires developer time to build and test the scripts, and you'll still need a manual review pass to catch formatting issues.

Most business websites fall somewhere in between. A hybrid approach, automated extraction with manual cleanup, is typically the most efficient.