Screenshot 1

Quick Look

Pesticide is a CSS debugging tool that outlines all elements on a webpage to simplify layout issue identification.

AI Overview

Who is this for?

Web developers and students learning web development who need to debug CSS layout issues.

Key Features

  • Inserts outlines on all elements
  • Aids in debugging layout problems
  • Created for web development students
  • Forked from original Pesticide tool

Reviews Analysis

Overall Sentiment

Mostly Positive

Users find Pesticide to be a very helpful tool for debugging CSS layout issues, although some minor frustrations exist.

Note: AI analysis focuses on the substance and recency of reviews, which may differ from the overall store rating.


What Users Love

  • Effectively highlights all elements for easy layout debugging.
  • Simple and straightforward to use.

Points to Consider

  • × Can be difficult to turn off or remove outlines.
  • × The default outline color is not always ideal against all backgrounds.

Official Description

From the Developer


A CSS debugging tool that inserts outlines onto all elements to help with debugging layout issues

This extension inserts the Pesticide CSS into the current page, outlining each element to better see placement on the page.

This is a forked copy of Pesticide created originally by Adam Morse: https://github.com/mrmrs/pesticide

This copy of Pesticide is created for students on the Complete Web Development Bootcamp by Dr. Angela Yu. https://www.udemy.com/course/the-complete-web-development-bootcamp/

Your extension? Let us know if we can update or correct anything!

Key Info

  • Rating:
    4/5.0

    (139 ratings)

  • Users:200,000
  • Version:2.0.0
  • Updated:Mar 10, 2025

Stats from Chrome Web Store