Unexpected intelimize script loading – not in custom code or integrations

Publishing help SEO
1

Hi everyone,

I’m hoping someone can help me track down an unexpected third-party script loading on my Webflow site.

After running a full performance audit and cleanup using Google PageSpeed Insights, I noticed that a script from:

intelimize.co

is loading on the site and contributing to unused JavaScript and main thread blocking.

The issue is:

  • There is no custom code added at the page level

  • No custom code in Site Settings

  • No custom code in Workspace settings

  • Nothing in Integrations (including no obvious optimization / A/B testing tools enabled)

  • No visible app/add-on related to Intelimize

I’ve double-checked:

  • Page-level custom code

  • Site-wide custom code (head + before )

  • Integrations panel

  • Workspace-level settings

  • Any scripts inside embeds

I can’t find any reference to Intelimize anywhere in the Designer or settings.

It’s possible this was added years ago and I’ve forgotten how, or that it’s being injected via some legacy integration or Webflow-related feature (e.g. Insights, Optimize, or an older experiment setup).

Has anyone experienced:

  • Intelimize being injected automatically?

  • Webflow Insights or Optimize-related scripts loading without obvious configuration?

  • A legacy experiment system that persists after deactivation?

Any guidance on where else to look would be appreciated. I’d really like to fully remove it since it’s impacting performance metrics.

Thanks in advance :folded_hands:

2

With no shared URL to inspect, I could only guess. Should be the published one.

3

It’s likely Webflow’s Optimize feature.

If you’re not using it at all, it’s possible it’s left over from a beta, I’d open a ticket with support to see if the feature flag can be deactivated.

4

Hey memetican, good catch. You can verify the source in your Network tab. Just check the “Initiator” column to see if a native Webflow system file is triggering it. Also, look for an Optimize icon in the Designer’s left sidebar. That script can sometimes stick around if a draft experiment was started but never fully archived.

5

I’m using Insights but not Optimize (I haven’t set it up). Are they the same thing since they exist in the same sidebar? Aparently Webflow bought intelimize in 2024? But it is not clear why it is clearly listed in the network tab. Here is my website kwizie.ai

6

The attribute data-wf-intellimize-customer-id=“117896636” is present on the HTML element. That suggests this script was enabled at the Webflow project level. If you’d like it removed, Webflow will likely need to disable it.