Free Tool

INP Checker

Test your Interaction to Next Paint (INP) score. Measure page responsiveness and identify slow interactions that hurt user experience.

INP Checker tool interface goes here

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What You Get

Instant analysis results
No registration required
Completely free to use
Mobile & desktop scores
Core Web Vitals metrics
Actionable recommendations

How It Works

1

Enter Your URL

Paste the website URL you want to analyze

2

Run Analysis

Our tool scans your site using industry-standard metrics

3

Get Results

Review detailed scores and actionable recommendations

Frequently Asked Questions

INP replaced FID in 2024. While FID only measured the first interaction, INP measures all interactions throughout the page session.
INP requires real user interactions. Lab tools use Total Blocking Time (TBT) as a proxy, which correlates well with INP.
Break up long JavaScript tasks, optimize event handlers, reduce third-party scripts, and use web workers for heavy computation.

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Helpful Guides

How to Improve Interaction to Next Paint (INP)

Learn how to optimize Interaction to Next Paint (INP) for better responsiveness. Covers JavaScript optimization, event handling, and reducing input delay.

Mobile Performance Optimization Guide

Optimize your website for mobile devices. Covers responsive design, mobile-first development, touch optimization, and mobile Core Web Vitals.

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