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VisBugChrome DevTools
Free

The open-source extension is available without a license fee.

 Free

Free and included with Google Chrome.

Web, Browser extension Windows, macOS, Linux
  • Edit spacing, type and colour on a live page without touching developer tools
  • Measurement and accessibility inspection built into the same toolbar
  • Built into Chrome with nothing extra to install
  • Performance tracing and network inspection
  • Changes are temporary and vanish on reload
  • Complex layouts can behave unpredictably when dragged
  • AI features rely on Google's Gemini service
  • Tests the Chromium engine only
Browser extension Downloadable app
Open source Open source
License: Apache-2.0 License: BSD-3-Clause
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 23, 2026

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