Wix INP optimisation in 2026: reducing Interaction to Next Paint below 200ms

Interaction to Next Paint replaced FID as a Core Web Vital in March 2024. Many Wix sites still fail the 200ms threshold, particularly on mobile. This lesson covers how to diagnose INP issues specific to Wix, which Wix apps are the biggest offenders, and every optimisation available without leaving the Wix platform.

Interaction to Next Paint replaced First Input Delay as a Core Web Vital in March 2024. Many Wix sites still exceed the 200ms Good threshold, particularly on mobile. This lesson covers how to diagnose INP issues specific to Wix, which third-party apps cause the worst scores, and every optimisation available without leaving the platform.

What INP Measures and Why It Replaced FID

First Input Delay measured only the first interaction on a page. Interaction to Next Paint measures the latency of all user interactions throughout the entire page session, including clicks, taps, and keyboard inputs. A page that feels slow to respond at any point during a visit will have a poor INP score. The 200ms threshold represents the boundary between Good and Needs Improvement in Google's assessment.

Diagnosing INP Issues on Wix

Step-by-step INP diagnosis for Wix sites

• Open Chrome DevTools and navigate to Performance > Core Web Vitals
• Interact with your Wix page (click navigation, buttons, forms) while recording
• Identify interactions with yellow (200-500ms) or red (500ms+) INP scores
• Check the Long Tasks panel to see which scripts are blocking the main thread
• Use PageSpeed Insights and switch to Field Data to see real-user INP from CrUX
• Install Google Chrome's Web Vitals extension for real-time INP monitoring

Wix Apps That Most Commonly Cause High INP

• Live chat widgets (Tidio, Intercom, Drift) that run large JavaScript bundles
• Popup and overlay apps with complex animation handlers
• Review collection widgets with frequent DOM updates
• Booking apps with real-time availability checking on user interaction
• Social media feed embeds with continuous background loading
• Poorly optimised third-party tracking scripts loaded synchronously

Optimisations Available Without Custom Development

• Delay or remove non-essential third-party scripts via Wix Marketing Integrations
• Replace live chat with a simpler contact form during testing periods
• Disable Wix animations on mobile via the Wix editor mobile view
• Reduce the number of active Wix apps, as each adds JavaScript weight
• Use the Wix Turbo performance setting (available on higher plans) for preloading
• Compress and resize all images to prevent layout-triggered repaints

How to Diagnose and Reduce INP on Your Wix Site

How to find and fix Interaction to Next Paint issues on a Wix site

• Open your Wix site in Google Chrome on a desktop computer and press F12 to open Chrome DevTools.
• Click the Performance tab in DevTools and then click the record button (circle icon).
• Interact with your Wix page naturally: click navigation links, open dropdown menus, click any booking or contact buttons, and scroll through the page.
• Stop the recording after 20-30 seconds of interaction and examine the results.
• Look for red or yellow bars in the Interactions lane. These represent interactions with high INP scores above 200ms.
• Click on any flagged interaction to see which JavaScript tasks are blocking the main thread during that interaction.
• Open PageSpeed Insights at pagespeed.web.dev, enter your Wix page URL, and scroll to Field Data to see your real-user INP score from Chrome User Experience Report data.
• Open your Wix Dashboard and navigate to Marketing & SEO > SEO Tools > Site Inspection. Review any Core Web Vitals flags related to INP in the report.
• In your Wix Editor, review which third-party apps are installed. Live chat widgets, popup tools, and social feed embeds are the most common INP culprits. Temporarily disable non-essential apps and retest INP to identify the source.
• For apps confirmed as INP causes, check the app settings for options to delay load or disable animations, or consider replacing them with lighter-weight alternatives that do not block user interaction.

Essential Tools for This Lesson

• SEO Fix in a Box: My Wix app. Free to install, it scans your site and shows what needs fixing, and the paid plan writes the fixes from your own Google searches