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CSS Z-Index Visualizer

Add elements with names and z-index values to see them rendered as a visual stacking diagram. Elements are sorted by z-index and displayed as layers so you can immediately understand the paint order and why one element sits above another.

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Layers (6)

Edit names and z-index values below. The diagram updates live.

Stacking diagram — top = highest z-index

1

Tooltip

1500

2

Modal dialog

1001

3

Modal overlay

1000

4

Dropdown menu

200

5

Sticky header

100

6

Base content

Paint order (low → high)

1100200100010011500

CSS Output

.tooltip {  position: relative;  z-index: 1500;} .modal-dialog {  position: relative;  z-index: 1001;} .modal-overlay {  position: relative;  z-index: 1000;} .dropdown-menu {  position: relative;  z-index: 200;} .sticky-header {  position: relative;  z-index: 100;} .base-content {  position: relative;  z-index: 1;}

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How to use

Add your elements

Click 'Add element' and enter a name and z-index value for each layer in your stacking context.

Read the diagram

Elements are sorted by z-index — higher values appear visually on top in both the stack diagram and the flat list.

Spot conflicts

Elements with the same z-index are highlighted — their paint order depends on DOM order, which can cause unexpected results.

Copy CSS

Copy a complete CSS snippet with position: relative and z-index declarations for all your named elements.