Core Web Vitals & INP: How to Score 100% Green on PageSpeed Insights in 2025
Joni Piwal
Lead Performance Engineer • Published September 5, 2026
Understanding INP: Replacing FID as a Core Ranking Metric
Google officially replaced First Input Delay (FID) with **Interaction to Next Paint (INP)** as an official Core Web Vitals ranking factor.
INP measures the latency of every single user interaction throughout the entire page lifecycle. Downsize raster graphics with our Image Converter, compress downloadable documents with Compress PDF, and debug JSON payloads with JSON Formatter.
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About the Author: Joni Piwal
Lead Performance Engineer
Web performance specialist optimizing enterprise codebases for green Chrome User Experience Report (CrUX) field metrics.
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