Gizmo: Code Editor and Preview Tool

by Max Fowler · Tools

Manifest V3 Free

View in Chrome Web Store Data as of 19 Oct 2026

Gizmo is a Chrome sidePanel web code editor and preview tool.

Users

+3 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#92K

#77K among extensions

Version

1.0

updated 16 Oct 2024

Users

monthly, 2 years

Latest, 19 Oct 2026: 80 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years

Latest, 19 Oct 2026: 2 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Gizmo: Code Editor and Preview Tool

Gizmo's simple sandbox environment let's you render basic HTML pages on the fly. Some basic support for Javascript, CSS, Canvas wrapped in HTML. Also preview SVG. Gizmo Features: 1. Code File Management: - Create, save, edit, and delete code files - Search existing file names 2. Dark/Light Mode Toggle 3. Code Preview: - Live preview of code that can handle some JavaScript wrapped in HTML. - Reset code preview 4. Version Control: - Save code - View code version history with timestamps - Open previous versions 5. Responsive design to expand width