Compare software

Pesticide vs VisBug: catalog facts
Pesticide	VisBug
Free Free and open source under the MIT licence.	Free The open-source extension is available without a license fee.
Browser extension	Web, Browser extension
Makes layout overflow and nesting mistakes obvious instantly Available as a bookmarklet, so no extension is required	Edit spacing, type and colour on a live page without touching developer tools Measurement and accessibility inspection built into the same toolbar
Outlines change layout slightly on elements without a box-sizing reset Simple by design; developer tools do more	Changes are temporary and vanish on reload Complex layouts can behave unpredictably when dragged
Browser extension	Browser extension
Open source	Open source
License: MIT	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.