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GridFox - The Grid Layout Firefox Extension

GridFox is a Firefox extension that overlays a grid on any website. If you can open it in Firefox, you can put a grid on top of it. It’s easy to customize, allowing you to create the exact grid you designed your layout around.

Install GridFox v1.2

More than just a handy development tool, GridFox also proves to be indispensable with the daily production of a grid-based site. Using GridFox, producers can easily check if their content maintains the grid, or if it needs to be edited. GridFox is the essential tool for creating and maintaining pixel-perfect, grid-based layouts.

How to use GridFox

The plugin is extremely simple to use. Once you have it installed, just right-click on any website and go the the the GridFox menu. From here you can display your current grid, or go to options to customize it to fit your website.

Gridfox screen shot


Want to see GridFox in action? Just check out some of the many sites which use grid-based layouts.

Yahoo! News

Column type: varied
Column widths: 10,201,12,12,88,12,13,88,12,12,201,13,10,280,10
Line thickness: 1px


Site width: 1000px
# of columns: 10
Line thickness: 10px grid

Site width: 965px
# of columns: 11
Line thickness: 5px grid

Column type: varied
Column widths: 200,200,200,185,185
Line thickness: 15px grid

Site width: 840px
# of columns: 8
Line thickness: 10px grid

Site width: 900px
# of columns: 9
Row height: 155px
Top offset: -8px
Line thickness: 15px