Measure INP on Safari.
And all other browsers.
Measure INP on Safari. And all other browsers.
Measure INP on Safari. And all other browsers.
Finally, a reliable cross-browser solution to evaluate responsiveness for all users. Best of all, it's completely free.
Finally, a reliable cross-browser solution to evaluate responsiveness for all users. Best of all, it's completely free.
Consistent INP Measurements
Across All Browsers
Consistent INP Measurements
Across All Browsers
Tracking INP on non-Chromium browsers has been a challenge. Our free polyfill brings the web-vitals library to Safari, making it easy to spot and improve responsiveness issues.
INPUT DELAY
INPUT DELAY
We capture the gap between the pointer-down event and its processing start to measure initial interaction delay.
We capture the gap between the pointer-down event and its processing start to measure initial interaction delay.
Processing time
Processing time
By analyzing the browser’s event prioritization, we calculate how long it takes to process queued events, even under load.
By analyzing the browser’s event prioritization, we calculate how long it takes to process queued events, even under load.
Presentation delay
Presentation delay
We estimate presentation delay by isolating time taken for visual updates after processing.
We estimate presentation delay by isolating time taken for visual updates after processing.
Great work!
I like the idea of also using next-event-listener as another opportunity to mark timings, alongside next tick and raf.
Michal Mocny
Sr Software Developer @ Google Chrome
Great work!
I like the idea of also using next-event-listener as another opportunity to mark timings, alongside next tick and raf.
Michal Mocny
Sr Software Developer @ Google Chrome
1-minute set up
Only one step - add the script. It compliments your existing solutions for measuring INP on Chrome. It just makes the same data available across all browsers now.
1. Insert the script
Add the JavaScript snippet into your site’s <head> tag.
2. Track INP
The script automatically monitors all interactions, logging the INP metric.
3. Analyze
Use the results to debug and refine your site’s responsiveness.
1-minute set up
1-minute set up
Only one step - add the script. It compliments your existing solutions for measuring INP on Chrome. It just makes the same data available across all browsers now.
1. Insert the script
Add the JavaScript snippet into your site’s <head> tag.
Add the JavaScript snippet into your site’s <head> tag.
2. Track INP
The script automatically monitors all interactions, logging the INP metric.
The script automatically monitors all interactions, logging the INP metric.
3. Analyze
Use the results to debug and refine your site’s responsiveness.
Use the results to debug and refine your site’s responsiveness.
Take it Further with
Navigation AI
instant speed for better ux
instant speed for better ux
Our AI predicts user actions and prefetches or prerenders the next page, delivering instant speed for frictionless browsing experiences.
Our AI predicts user actions and prefetches or prerenders the next page, delivering instant speed for frictionless browsing experiences.
Load pages in less than 2s
Load pages in less than 2s
Ensure near-instantaneous load speeds, even on slower connections.
Ensure near-instantaneous load speeds, even on slower connections.
Frequently asked questions
Why is measuring INP on Safari important?
Can this solution help improve my Core Web Vitals scores?
Who should use this tool?
How does INP impact my search engine rankings?
Does this tool work on mobile browsers?
Frequently asked questions
Why is measuring INP on Safari important?
Can this solution help improve my Core Web Vitals scores?
Who should use this tool?
How does INP impact my search engine rankings?
Does this tool work on mobile browsers?
Frequently asked questions
Why is measuring INP on Safari important?
Can this solution help improve my Core Web Vitals scores?
Who should use this tool?
How does INP impact my search engine rankings?
Does this tool work on mobile browsers?
Frequently asked questions
Why is measuring INP on Safari important?
Can this solution help improve my Core Web Vitals scores?
Who should use this tool?
How does INP impact my search engine rankings?
Does this tool work on mobile browsers?
Learn
User experience matters © 2025 UXIFY. U.S. registered trademark. All rights reserved.
Learn
User experience matters © 2025 UXIFY. U.S. registered trademark. All rights reserved.
Learn
User experience matters © 2025 UXIFY. U.S. registered trademark. All rights reserved.
Learn
User experience matters © 2025 UXIFY. U.S. registered trademark. All rights reserved.