Performance
Free INP Checker
Interaction to Next Paint (INP) reflects how quickly the page responds to taps and clicks when data is available.
Focus: INP
Guide
What is INP?
INP estimates input delay across interactions — not just the first click. A good INP is generally 200ms or less.
Why it matters
Slow interaction feedback makes the site feel broken even if visuals look fine.
Common problems
- Long JavaScript tasks blocking the main thread
- Heavy third-party scripts
- Unoptimized event handlers
How to fix them
Split long tasks, defer non-essential scripts, and reduce work in click/submit handlers.
Example
Example: heavy chat widget delaying button clicks → load it after idle.
FAQ
What is a good INP?
200ms or less is typically good.
Will every scan show INP?
Only when the provider returns interaction data.
Is it free?
Yes.