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Webflow fix guide

Render-Blocking JavaScript Detected on Webflow

Synchronous <script> tags in the <head> block page rendering. The browser must download and execute these scripts before painting any content.

Issue ID: CWV-RENDER-BLOCK-JS-001Severity: moderateEffort: M

Why this matters

Synchronous <script> tags in the <head> block page rendering. The browser must download and execute these scripts before painting any content. This affects load speed, Core Web Vitals, and how many visitors stay long enough to convert.

Webflow fix path

How to fix this on Webflow

Use page settings, Designer, or project settings.

  1. 1Locate the element or setting causing the issue.
  2. 2Update it in Webflow.
  3. 3Publish and validate the output.

After you fix it

  • ✓Run Lighthouse and confirm no render-blocking JS warnings

Same fix, other platforms

Fix render-blocking javascript detected on a different CMS

Other fixes

More Webflow fixes

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