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CSS breakpoint audit

CSS Breakpoint Checker

Audit CSS breakpoints and verify that responsive styles match real layout behavior.

CSS breakpoints should describe real layout needs, not only framework defaults. Use this audit to connect media queries to the exact UI behavior they protect.

Map breakpoints to layout changes

List each media query and the visible behavior it controls. Unused or duplicate breakpoints make responsive defects harder to reason about.

Navigation collapse and expansion

Grid column changes

Sidebar visibility

Typography and spacing shifts

Check the in-between widths

Framework breakpoints are convenient labels, but defects often appear between them. Test before, at, and after each breakpoint.

One width 20px below the breakpoint

The exact breakpoint width

One width 20px above the breakpoint

The smallest and largest supported widths

Release checklist

Every breakpoint has a clear layout reason.

No route relies on hidden horizontal overflow.

Breakpoint transitions work before, at, and after the threshold.

Dead or duplicate responsive rules are removed during cleanup.