Conversion Workers: edge-first A/B testing on Cloudflare.
Run experiments faster, with more control and less performance overhead. Allocate variants at the edge, inject changes (JS/CSS/HTML), run redirects/rewrites, and measure results in your existing analytics.
What you can test
- UI changes via CSS + JS injection
- Content swaps via HTML injection
- Landing page tests via redirects
- Full-page variants via rewrites
- Mixed mode: inject + redirect + rewrite together
- All with zero flicker guaranteed
Why teams choose Conversion Workers
Everything is built around speed, governance, and clean measurement — without heavyweight experimentation tooling.
Edge allocation
Assign visitors at the edge for fast, consistent variant delivery.
Minimal performance overhead
Zero flicker and avoid loading a large client library just to split traffic.
Hosted on client infrastructure
Runs on your Cloudflare — lower vendor lock-in, better value for money. Choose which features you want to use
Mixed-mode variations
Inject JS + CSS + HTML together (and combine with redirects/rewrites when needed).
Clean measurement
Send exposures/assignments into GA4 (or your stack) and keep your existing source of truth. No complicated analytics set ups.
Experiment governance
Centralised config and clear lifecycle: Build → QA → Live → Completed. Integrates with your staging sites, github and AI coding agents
How it works
A straightforward flow your team can understand — and control.
Deploy the Worker
Install on the routes you want to experiment on (staging, production, or both).
Define experiments
Target URLs, set splits, and define actions: inject, redirect, rewrite.
Track & learn
Track exposure + conversions with out of the box analytics integrations.
Feature highlights
Built for practical experimentation teams. Powerful enough for engineers, simple enough for CRO operators.
Targeting
Match by URL path rules. Keep targeting simple and predictable.
Persistence
Stable assignments via cookies, with sensible defaults and clear override rules.
Variation types
JS/CSS/HTML injection, plus redirects and rewrites — usable alone or combined.
Staging → Production workflow
Run QA safely, then promote to Live when you’re confident.
Request flow (simplified)
Want to see it running on your site?
Book a demo and we’ll walk through setup, governance, and tracking — tailored to your stack.