Does CSS Multi-Column Generator work with large files?

Yes, since it runs in your browser, it can handle reasonably large inputs. Performance depends on your device's capabilities.

Can I use this tool on mobile devices?

Yes, this tool works on any device with a modern browser including phones and tablets.

Does this tool support syntax highlighting?

Yes, the tool provides color-coded syntax highlighting to make your code easier to read and debug. Different elements like strings, numbers, and keywords are shown in distinct colors.

Does this tool work offline?

Yes, once the page has loaded, the tool works entirely in your browser without needing an internet connection. All processing is done locally with JavaScript.

Is there a character or line limit?

There is no hard limit. The tool can handle files with tens of thousands of lines, though very large inputs may slow down depending on your browser and device.

CSS Multi-Column Generator - オンラインツール

Columns

Gap (px)

Min Width (px)

Rule Style

Rule Width (px)

Rule Color

Preview

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium.

CSS Code

How It Works

Set column count or width: Choose how many columns to divide content into, or set a minimum column width and let the browser calculate the count.
Configure gaps and rules: Set the column gap size and optionally add a column rule (a decorative divider line between columns).
Preview with sample text: A live preview shows how real content flows across the columns.
Copy the CSS: Copy the generated column-count, column-width, column-gap, and column-rule CSS to your stylesheet.

Why Use CSS Columns?

CSS multi-column layout is perfect for newspaper-style article text, magazine-style content blocks, definition lists, and masonry-style card arrangements. Unlike Flexbox or Grid which require knowing the number of items in advance, multi-column layout automatically balances content across columns. This generator creates the correct combination of column-count and column-width properties — using column-width with column-count as a maximum creates a responsive layout that adjusts column count based on container width without media queries.

CSS Properties Generated

column-count — fixed number of columns
column-width — minimum column width for responsive layouts
column-gap — space between columns
column-rule — decorative line between columns (width, style, color)
column-span — elements that span all columns (headers)

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How It Works

Why Use CSS Columns?

CSS Properties Generated

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