CSS Flexbox Generator: Visual Alignment
Build flexbox layouts with a visual generator — set justify-content, align-items, flex-wrap, and direction.
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Tags: CSS flexbox generator, flexbox layout tool, visual flexbox builder
CSS Flexbox Generator: Visual Alignment Flexbox controls how items distribute along one axis. The property set is compact but the interactions between , , , and item values are non-obvious to visualize from code alone. A flexbox generator shows the live layout as you change values. --- What is The Flexbox Mental Model? A flex container has: A main axis — the primary direction of flow (row or column) A cross axis — perpendicular to the main axis positions items on the main axis. positions items on the cross axis. Almost every flexbox confusion comes from mixing up which axis each property operates on. --- What is Container Properties? Note: Changing to swaps which axis is "main." then controls vertical spacing, not horizontal. Use instead of margins for cleaner wrapping behavior. --- What…
Frequently Asked Questions
What is CSS Flexbox?
CSS Flexbox (Flexible Box Layout) is a one-dimensional layout model that distributes space and aligns items along a single axis — either a row or a column. It is the standard tool for navigation bars, button groups, card rows, and centering content within a container.
How do I center elements with flexbox?
Add `display: flex; justify-content: center; align-items: center` to the parent container. `justify-content` centers along the main axis (horizontal by default); `align-items` centers on the cross axis (vertical by default). Together they center the child both ways.
What is the difference between justify-content and align-items?
`justify-content` aligns items along the main axis (the direction flex flows — row by default). `align-items` aligns items on the cross axis (perpendicular to the main axis). For a row-direction flex container, `justify-content` controls horizontal alignment and `align-items` controls vertical alignment.
What is flex-grow and flex-shrink?
`flex-grow` determines how much a flex item expands to fill available space. A value of `1` means the item takes its share of free space. `flex-shrink` controls how items shrink when the container is smaller than the total item sizes. The shorthand `flex: 1` sets grow to 1, shrink to 1, and basis to 0%.
How do I create a navigation bar with flexbox?
Set `display: flex` on the `<nav>` element. Use `justify-content: space-between` to push the logo left and nav links right. Add `align-items: center` to vertically align everything. Use `gap` between nav items instead of margin for cleaner spacing.
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