CSS Grid vs Flexbox: When to Use Each Layout System

One of the most common questions new developers ask is whether to use CSS Grid or Flexbox for their layouts. The truth is, they're not competitors—they're complementary tools designed for different jobs. Flexbox is ideal for one-dimensional layouts where items need to distribute space along a single axis, whether horizontal or vertical. Think navigation bars, card components with aligned content, or form elements that need to stretch and shrink responsively. Flexbox excels at alignment and distributing space among items in a container. CSS Grid, on the other hand, is built for two-dimensional layouts where you need control over both rows and columns simultaneously. Grid is your go-to for overall page structure, complex dashboards, image galleries, and magazine-style layouts where content needs to align perfectly across both axes. The best approach is often to use them together—use Grid for the main page layout and Flexbox for components within those grid cells. Start thinking in terms of dimensions: if you're aligning items in one direction, reach for Flexbox; if you're positioning items in both directions, Grid is your answer.