Free INP Tester — Check Interaction to Next Paint
Test your Interaction to Next Paint score and identify which interactions are causing responsiveness delays on your pages.
Free — no account required for a single check. Sign up for continuous monitoring →
What the INP Tester checks
INP score estimate
Long task identification
JavaScript execution blocking main thread
Total Blocking Time (correlated with INP)
Fix recommendations
How it works
Runs Lighthouse with CPU throttling to simulate mobile device performance and identify long tasks that delay user interaction responsiveness.
Monitor continuously — not just once
This free tool runs a one-off check. AuditJet monitors your site on a schedule — alerting you when scores change, before performance regressions affect your rankings and revenue.
INP Tester — FAQ
Is the INP Tester free?
Yes — INP Tester is completely free to use. No account required for a single-URL check.
How does the INP Tester work?
Runs Lighthouse with CPU throttling to simulate mobile device performance and identify long tasks that delay user interaction responsiveness.
What does the INP Tester check?
INP score estimate. Long task identification. JavaScript execution blocking main thread. Total Blocking Time (correlated with INP). Fix recommendations.
How is this different from Google PageSpeed Insights?
Google PageSpeed Insights is a one-off manual tool. AuditJet adds continuous monitoring, regression alerting, and revenue impact on top of the same performance analysis — so you're notified when scores change, not just when you remember to check.