CSS Masonry Layout Generator

Generate pure CSS masonry-style layouts with responsive breakpoints, configurable gaps, and optional full-width skip selectors

Enter the target column count, container width, gap, and optional breakpoint rules, then choose whether you want a CSS-columns implementation or a Flexbox wrap implementation. The tool outputs ready-to-copy HTML and CSS with comments.

How to use it:

  • Columns: desired maximum columns on the largest breakpoint
  • Container Width: any CSS width value such as 1200px, 100%, or min(1200px, 100%)
  • Gap: spacing between cards such as 16px or 1rem
  • Layout Engine: choose CSS columns for a classic masonry-like waterfall, or Flexbox for a more predictable row wrap
  • Responsive Breakpoints: one rule per line like 640:2, 960:3, 1280:4
  • Skip Elements: optional selectors that should span full width or avoid the standard card flow, such as .masonry__item--featured or :nth-child(5)

Output:

  • ready-to-copy HTML scaffold
  • commented CSS
  • breakpoint summary and skip-selector notes

Example Results

1 examples

Generate a 4-column responsive masonry snippet for a gallery page

Create copy-ready HTML and CSS with classic waterfall behavior, tablet and desktop breakpoints, and a featured card that spans full width.

HTML
```html
<section class="masonry">...
```

CSS
```css
.masonry { ... }
```
View input parameters
{ "columns": 4, "containerWidth": "1200px", "gap": "20px", "layoutEngine": "grid", "responsiveBreakpoints": "640:2\n960:3\n1280:4", "skipElements": ".masonry__item--featured" }

Key Facts

Category
Developer & Web
Input Types
number, text, select, textarea
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The CSS Masonry Layout Generator is a developer tool that creates pure CSS waterfall layouts without relying on JavaScript. By configuring column counts, container widths, gaps, and responsive breakpoints, you can instantly generate ready-to-copy HTML and CSS code using either CSS Columns or Flexbox engines.

When to Use

  • •Building image galleries or portfolio grids where items have varying heights.
  • •Creating responsive blog post feeds that adapt seamlessly to mobile, tablet, and desktop screens.
  • •Implementing lightweight masonry layouts without adding heavy JavaScript libraries to your project.

How It Works

  • •Define the maximum number of columns, container width, and the gap spacing between your cards.
  • •Choose your preferred layout engine: CSS Columns for a classic waterfall effect or Flexbox for predictable row wrapping.
  • •Add responsive breakpoints (e.g., 640:2) and specify any CSS selectors that should skip the masonry flow to span full width.
  • •Copy the generated HTML scaffold and commented CSS directly into your project.

Use Cases

Designing a Pinterest-style image gallery with varying aspect ratios.
Structuring an e-commerce product grid featuring promotional banners that span the full width.
Developing a responsive news feed where article cards adjust their column count based on the user's device.

Examples

1. Responsive Image Gallery

Front-end Developer
Background
A developer is building a photography portfolio where images have different heights and aspect ratios.
Problem
Needs a lightweight, responsive waterfall layout without using a JavaScript library like Masonry.js.
How to Use
Set Columns to 4, Gap to 16px, select CSS Columns as the engine, and add breakpoints for mobile and tablet.
Example Config
Columns: 4
Gap: 16px
Layout Engine: CSS Columns
Responsive Breakpoints:
640:2
960:3
Outcome
Generates pure CSS code that displays 2 columns on mobile, 3 on tablet, and 4 on desktop, perfectly arranging the varying-height images.

2. Blog Feed with Featured Posts

Web Designer
Background
Designing a blog index page that displays standard posts in a grid, but featured posts need to span the entire width of the container.
Problem
Standard CSS grids make it difficult to mix masonry flow with full-width elements easily.
How to Use
Configure a Flexbox layout engine, set the container width to min(1200px, 100%), and add .post--featured to the Skip Elements field.
Example Config
Container Width: min(1200px, 100%)
Layout Engine: Flexbox
Skip Elements: .post--featured
Outcome
Produces HTML and CSS where standard posts wrap neatly, while any element with the .post--featured class breaks out of the columns to span 100% width.

Try with Samples

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FAQ

What is the difference between CSS Columns and Flexbox engines?

CSS Columns create a true vertical masonry flow (waterfall), while Flexbox wraps items into rows, which is better for maintaining horizontal reading order but may leave uneven bottom edges.

How do I format the responsive breakpoints?

Enter one rule per line using the format width:columns. For example, 768:2 means the layout will display 2 columns at a viewport width of 768px.

What are skip elements?

Skip elements are specific CSS selectors (like .featured-card) that bypass the standard masonry flow, allowing them to span the full width of the container.

Does this tool require JavaScript to run the layout?

No, the generated code relies entirely on pure CSS, ensuring fast load times and no JavaScript dependencies.

Can I use custom CSS units for the gap and container width?

Yes, you can use any valid CSS unit, such as px, rem, %, or even CSS functions like min(1200px, 100%).

API Documentation

Request Endpoint

POST /en/api/tools/css-masonry-layout-generator

Request Parameters

Parameter Name Type Required Description
columns number No -
containerWidth text No -
gap text No -
layoutEngine select No -
responsiveBreakpoints textarea No -
skipElements textarea No -

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-css-masonry-layout-generator": {
      "name": "css-masonry-layout-generator",
      "description": "Generate pure CSS masonry-style layouts with responsive breakpoints, configurable gaps, and optional full-width skip selectors",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=css-masonry-layout-generator",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]