CLS Checker - Journey Further

How to install Open in Chrome Web Store

CRX ID

ejgjaeamjppjgmjnaaljcocboejdinpj

Status

Live on Store

Description from extension meta

Test and debug cumulative layout shifts (CLS) in the browser

Image from store

Description from store

This tool measures the 'cumulative layout shifts' that occur when a page is loaded in the browser using data from the Chrome Performance API. These are then listed showing the 'layout shift' score and visualised on the webpage.

Green squares show where the element started and red indicates where the element was shifted to.

Latest reviews

Anonymous 2023-01-31: Do the job ! Thanks
서교욱 2022-12-21: This a very useful program that saves time. If there's a mobile version, it'll be perfect
서교욱 2022-12-21: This a very useful program that saves time. If there's a mobile version, it'll be perfect
Rife Interactive 2022-04-01: FANTASTIC tool - great job guys, thank you so much
Rife Interactive 2022-04-01: FANTASTIC tool - great job guys, thank you so much
Eric Caldwell 2021-08-14: Been waiting on an extension that does exactly this! Bravo. Please keep this extension updated.
Eric Caldwell 2021-08-14: Been waiting on an extension that does exactly this! Bravo. Please keep this extension updated.
Dan Rowlands 2021-05-05: Great tool for identifying CLS issues on page - ideal for visualising issues that developers can then use to fix CLS issues to improve performance!
Dan Rowlands 2021-05-05: Great tool for identifying CLS issues on page - ideal for visualising issues that developers can then use to fix CLS issues to improve performance!
Dan Nutter 2021-05-05: This tool has made isolating CLS issues so much easier!! It’s now a vital part of my Core Web Vitals analysis toolkit.
Dan Nutter 2021-05-05: This tool has made isolating CLS issues so much easier!! It’s now a vital part of my Core Web Vitals analysis toolkit.
Hannah Rogers 2021-05-05: Really helpful for clearly illustrating where CLS is happening on page to kick off investigations and fixes
Hannah Rogers 2021-05-05: Really helpful for clearly illustrating where CLS is happening on page to kick off investigations and fixes
Stelios Kalogeropoulos 2021-05-05: A real time saver... great work!
Claudia Farrington 2021-05-05: Really helpful tool!
Jess Batin 2021-05-05: Really useful to visualise CLS
Anonymous 2021-03-19: Really useful
Nathan Brush 2021-03-19: Very handy - thanks!
Jamie Pollard 2021-03-19: Great tool. Thanks!
Jon Crowder 2021-03-18: Really helpful. Thank you developer.
Jon Crowder 2021-03-18: Really helpful. Thank you developer.

Extension Actions