Hi Product Hunt! I built Adjusi because checking a layout on one screen at a time is slow, and browser dev tools only show one size at once.

Adjusi puts your page on up to fifteen device frames side by side, from the folded Galaxy Z Fold to the iPhone 16 Pro Max, tablets, laptops and 2560 px desktops. A few things I like most:

Drag any frame edge until the layout breaks, or type an exact width and height (up to 4000 px).
Type a media query and press Find where it flips. Adjusi sweeps every width and tells you the exact pixel where it starts or stops matching.
Scroll one frame and the others follow, even when the screens have different heights.
Add a note to any frame and copy a clean Markdown report for a ticket or pull request.
The address bar always holds your setup, so sharing it is just sending the link.

It works with public pages, staging sites and http://localhost:3000. Free, no account. I would love to hear which devices or checks you want next.

Hi Product Hunt! I built Adjusi because checking a layout on one screen at a time is slow, and browser dev tools only show one size at once.

Adjusi puts your page on up to fifteen device frames side by side, from the folded Galaxy Z Fold to the iPhone 16 Pro Max, tablets, laptops and 2560 px desktops. A few things I like most:

Drag any frame edge until the layout breaks, or type an exact width and height (up to 4000 px).
Type a media query and press Find where it flips. Adjusi sweeps every width and tells you the exact pixel where it starts or stops matching.
Scroll one frame and the others follow, even when the screens have different heights.
Add a note to any frame and copy a clean Markdown report for a ticket or pull request.
The address bar always holds your setup, so sharing it is just sending the link.

It works with public pages, staging sites and http://localhost:3000. Free, no account. I would love to hear which devices or checks you want next.

Adjusi

Responsive Website Checker

Responsive Website Checker