InspectDev
"It looks fine on your machine. The client sees something else."
Preview any page across breakpoints — without resizing your browser window.
You built a responsive layout. It looks right at your screen size. But your users are on phones, tablets, laptops, and ultrawide monitors. Testing usually means dragging your browser window back and forth, guessing at breakpoint widths, and hoping nothing breaks in between. Or opening DevTools device mode, which never quite matches real rendering.
- —Drag the browser window back and forth, eyeballing breakpoints
- —Open DevTools device mode — close, but not real rendering
- —Miss overflow issues that only appear at specific widths
- —Find out about the bug from a client screenshot, not your own testing
- ✓View the page at mobile, tablet, and desktop widths instantly
- ✓Spot horizontal scroll, clipped content, and overflow issues
- ✓Measure exact spacing at each breakpoint to verify scaling
- ✓Catch the bug before your client does
Breakpoint Preview
View the page at common widths — mobile, tablet, desktop — without resizing your browser. See all three at once, side by side, and spot issues that only appear at specific sizes.
Overflow Detection
Spot horizontal scroll, clipped content, and elements that break out of their container. These are the bugs that slip through when you only test at your own screen size.
Dimension Measurement
Measure exact spacing and element sizes at each breakpoint. Verify that padding, margins, and gaps scale the way you intended — not just at one width, but across the range.
- 1
Open InspectDev and select Responsive Checker from the toolbar.
- 2
View the page at mobile (375px), tablet (768px), and desktop (1280px) widths. Scan for layout breaks.
- 3
Spot an element that overflows at tablet width. Use Page Outliner to see its container structure.
- 4
Use Page Ruler to measure the element and its container. Identify what is causing the overflow.
- 5
Use Layout Tools to check flex and grid behavior at the problematic breakpoint.
- 6
Fix the issue in your CSS, then re-check all three widths to confirm the layout holds.
Try this workflow free
Every tool in this workflow is included in the free version. Upgrade to Pro when you need persistent workspaces and team sync.
