Compare software

VisBugWeb Developer
Free

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

 Free

Free and open source under the GPL.

Web, Browser extension Browser extension
  • Edit spacing, type and colour on a live page without touching developer tools
  • Measurement and accessibility inspection built into the same toolbar
  • Dozens of page manipulations one click away, many still missing from devtools
  • Same toolbar across Chrome, Firefox and Edge
  • Changes are temporary and vanish on reload
  • Complex layouts can behave unpredictably when dragged
  • Much of its original value is now covered by built-in developer tools
  • Interface is a dense menu-driven toolbar
Browser extension Browser extension
Open source Open source
License: Apache-2.0 License: GPL-3.0
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

Checked September 22, 2026

Checked September 22, 2026

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