The List Layouts for Trello extension allows you to toggle the Trello board layout from horizontal to grid to vertical.

Download and install the extension from here: Chrome Web Store - List Layouts for Trello

Pull requests welcome. Take a look at the Issues page for features needing attention. Post on an existing issue or create a new issue if you have questions. It's a small extension, easy to grok if you have some web development experience.

Contributors

• Thank you @monovertex for the (much appreciated) grid layout!
• Thank you @zaucy for local CSS!
• Thank you @ck0z for reporting breakage!
• Thank you @ehsankooheji for saved layout state!

Grid

Vertical

Horizontal