# Webflow A/B testing for marketer-owned sites

Install Otter through Webflow Custom Code, publish once, and test page content or complete URL variants without adding an experimentation build step.

## Setup

Install location: Webflow Project Settings > Custom Code

1. Paste the Otter snippet into the head code for the project.
2. Publish the Webflow site and verify the installation.
3. Create visual changes or split URL variants in Otter.

```html
<!-- Otter -->
<style id="optimo-hide">body{opacity:0 !important}</style>
<script src="https://www.otterab.com/sdk/optimo.js"
  key="YOUR_API_KEY" async></script>
```

## What teams test on Webflow

- Landing page copy
- Form and CTA placement
- CMS template experiments
- Split URL campaigns

## Frequently asked questions

### Can I install Otter without a Webflow app?

Yes. Otter uses Webflow's built-in Custom Code area, so no marketplace app or custom build is required.

### Will tests work on Webflow CMS pages?

Yes. A site-wide installation loads on static and CMS-generated pages, and URL rules choose exactly where each test runs.

### Can marketers build variants without code?

Yes. Otter's visual editor lets marketers change copy, styles, visibility, and layout on the live page.

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Canonical page: https://www.otterab.com/ab-testing/webflow