---
type: Migration Guide
title: "WordPress to headless CMS migration"
description: "Move from monolithic WordPress to a headless setup (WP-as-CMS + JS frontend, or full migration to Sanity/Contentful) without losing the SEO baseline."
resource: "https://prerendering.com/migrations/wordpress-to-headless"
tags: [migration, hard]
timestamp: 2026-05-11T00:00:00Z
---

# WordPress to headless CMS migration

Move from monolithic WordPress to a headless setup (WP-as-CMS + JS frontend, or full migration to Sanity/Contentful) without losing the SEO baseline.

A guide for publishers and content teams moving off monolithic WordPress to a headless architecture. Headless adds rendering complexity that can wreck indexation if URL preservation, redirects, and metadata mapping are not planned carefully.

- Difficulty: Hard
- Typical duration: 8 to 16 weeks

## Preflight

- Full URL inventory: export every indexed and indexable URL from Search Console + Screaming Frog.
- Metadata mapping: which WordPress fields map to which target-CMS fields, including SEO plugin data (Yoast/Rank Math).
- Redirect plan: every URL that changes needs a 301; every URL that stays needs preserved indexation.
- Rendering decision: which routes go SSG, ISR, or SSR on the new frontend.
- Comment, tag, and category strategy: many migrations lose these silently.

## Steps

- **Set up the target CMS** — Configure Sanity / Contentful / Hygraph with the schema that maps to your current content model. Validate with sample content.
- **Build the frontend with rendering parity in mind** — Implement canonical generation, OG tags, JSON-LD, sitemap generation matching current behavior. Curl-diff against current site for 100+ URLs.
- **Migrate content in stages** — Bulk-import content. Validate slug uniqueness and slug history. Preserve publish dates, authors, and modification dates.
- **Build the redirect map** — For every URL change (slug, hierarchy, structure), create a 301 entry. Verify no chains. Deploy redirects at edge or origin proxy.
- **Cutover at low-traffic window** — Switch DNS or origin routing. Resubmit sitemap to Search Console immediately.
- **Monitor and recover** — Indexation drops 5-20% in the first 2-4 weeks are normal. Recovery to baseline typically takes 60-90 days.

## Rollback

- Maintain DNS-level revert path for 14 days post-migration.
- Keep WordPress origin deployable but unindexed (noindex via robots.txt) for 30 days.
- Per-section rollback via reverse-proxy routing if one route family fails worse than others.

## Monitoring

- Search Console Page indexing — daily for 30 days, weekly for 90 days.
- Search Console performance — track impressions and clicks at the URL group level.
- 404 spikes in server logs (or CDN edge logs) — investigate every spike within 24 hours.
- Sitemap status in Search Console — must show "Success" for the new sitemap within a week.
- Top-100 query rank tracking via your preferred rank tool — expect 4-8 week recovery curve.

## Metrics

- Expected downtime: < 30 min (DNS cutover)
- Typical rollback time: ~ 1 hour (DNS TTL)
- Time to indexation recovery: 60-90 days
- Acceptable indexation drop window: < 20% for first 14-21 days

## Related

- [SEO Migration Strategy for Re-platforming Projects](/blog/seo-migrations-and-replatforming-strategy.md)
- [Technical SEO for Headless CMS Architectures](/blog/technical-seo-for-headless-cms.md)
- [Indexation Recovery After Site Migrations](/blog/indexation-recovery-after-site-migrations.md)