CLS Visualizer

Visualizer the CLS of any webpage
What is CLS Visualizer?
CLS Visualizer is a Chrome extension specifically designed to evaluate and visualize the Cumulative Layout Shift (CLS) - a user-centric metric essential in measuring visual stability. Its functionality lies in its ability to quantify unexpected layout shifts on a webpage, providing a clear visual representation of these shifts for improved and simplified debugging and optimization. With CLS Visualizer, ensuring a delightful user experience by maintaining a low CLS becomes a straightforward task.

Extension stats

Users: 10,000+
Rating: 4.36 (11)
Version: 1.4 (Last updated: 2022-11-20)
Creation date: 2020-11-12
Risk impact: Low risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 3
Size: 17.68K

Other platforms

Not available on Firefox
Not available on Edge
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Extension summary

This plugin will highlight and visualize the Cumulative Layout Shift.

Cumulative Layout Shift (CLS) is an important, user-centric metric for measuring visual stability because it helps quantify how often users experience unexpected layout shifts—a low CLS helps ensure that the page is delightful.

Unfortunately the CLS is a pain to debug without visualisation

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Best tool for CLS optimization
  • Easy to use
  • Helpful for identifying layout shifts
  • Works well for viewport analysis
  • Gratitude expressed for the tool
Cons
  • No longer works for some users
  • List items in pop-up are not clickable
Most mentioned
  • Great tool
  • Thank you for this tool
  • Very good add-on for optimizing CLS
Recent reviews
by Philipp Nies, 2024-01-10

greatttttt
by Yahya Ahmed, 2023-10-23

Best tool for cls
by Bertan mızrak, 2023-09-19
View all user reviews

Extension safety

Risk impact

CLS Visualizer requires very minimum permissions.

Risk likelihood

CLS Visualizer has earned a good reputation and can be trusted.

Upgrade to see risk analysis details

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