CSS Border Generator
Create solid, dashed, dotted or double CSS borders with custom width, color and corner radius. Preview and copy the rule.
Set your values
Adjust the values, then calculate your result.
How to use CSS Border Generator
- Load the included example or provide your own input and settings.
- Choose the operation and review the supported format below.
- Run the tool, inspect the result, and copy or download it.
Preview a consistent border rule
Choose a border width, line style, color and corner radius to generate a reusable CSS class. The preview uses the same properties that appear in the output, so changes to the controls can be inspected directly. All four sides use one consistent border. Use the generated rule for a card, input container or small component, then adjust the class name to match your stylesheet.
Account for the box model
A border normally contributes to the rendered element size unless box sizing is configured appropriately. The generated rule does not change the surrounding layout or force a box-sizing convention. Double borders need enough width for both strokes and the separating gap to appear clearly; dotted and dashed patterns depend partly on browser rendering. A zero-width choice deliberately hides the border while preserving the selected radius value.
Does CSS Border Generator upload my input?
No. This tool processes input locally in your browser without calling a conversion API.
Is input uploaded?
Processing takes place in your browser. This tool does not send your input or selected files to a conversion API.