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Design · Local utility

CSS Background Pattern Generator

Compose dots, grid, or diagonal background patterns from pure CSS gradients — no image file — with tile, mark, and color controls.

Task path / input to outcome

Pick a pattern

Runs locally · Nothing is uploaded

How CSS Background Pattern Generator works, privacy, and related tools

Task path / input to outcome

How to create a CSS background pattern

  1. 01

    Pick a pattern

    Open Pattern and choose Dots, Grid, or Diagonal. All three are built from CSS gradients alone — no image file is involved at any point. Switching between them keeps your tile, mark, and color values, so comparing styles costs nothing. The default 28 px dot grid is a quiet place to start.

  2. 02

    Set the tile

    Choose a Tile size from 8 to 96 px and a Mark width from 1 to 16 px. The mark cannot exceed half the tile size; if it does, the status shows CHECK VALUES with the exact rule.

  3. 03

    Choose the two colors

    Pattern color draws the marks and Canvas color fills the ground beneath them. Subtle patterns come from low contrast between the two — a mark only slightly darker than the canvas reads as texture rather than decoration.

  4. 04

    Judge the repeat at real scale

    The preview tiles the result across the whole panel, which is where weak contrast and cramped tiles reveal themselves. As a rule of thumb, keep the mark well under half the tile: a 2 px mark on a 28 px tile reads as texture, not noise.

  5. 05

    Copy the pattern CSS

    Press Copy CSS or Download .css to save toolars-background-pattern.css. The .pattern rule is three declarations — background-color, background-image, and background-size — ready for any element.

  6. 06

    Apply and adapt the rule

    The rule drops onto any element without layout side effects, since it only paints the background. Adjust background-size later to change the pattern density, and lower the contrast between the two colors — rather than shrinking the mark — when a pattern competes with text.

Tool facts

Processing
In your browser
Input leaves this device
Never
Retention
Nothing is stored
Price
Free

Your input stays in the browser.

CSS Background Pattern Generator uses its verified local execution path and does not create a hidden input or output history.

Local execution

Runs inside the current browser tab.

No hidden processing

Active tool data never becomes a Toolars document record.

No account required

Use the core workflow without creating a profile. Favorites sync to your account after you sign in.

Immediate reset

Clear the tab and the active working data is gone.

What CSS Background Pattern Generator actually does

A documentation page can use a faint dot grid behind code samples; a landing page can use diagonal texture without a PNG; a dashboard can use grid lines. The preview and exported rule use the same gradient values, tile size, and colors, though the final appearance also depends on the element size and browser rendering. Export the CSS, then check it behind your real content.

Common questions

Does the pattern really use no images?
Correct. Dots are a radial gradient, the grid is two crossed linear gradients, and the diagonal is a repeating linear gradient; background-size repeats the tile. The result scales to any resolution with zero extra requests.
Why is my mark width rejected?
The mark cannot exceed half the tile size — past that point the marks merge into a solid field. The CHECK VALUES message names the limit, and copy and download stay disabled until the values pass.
Will the tiles line up seamlessly?
Yes. Each pattern is designed to repeat edge to edge at the chosen tile size, and the live preview shows the same tiled surface the exported CSS produces on a real page. Because the repeat derives from one background-size value, changing the density later never breaks the seams.
What is the half-pixel gap in the gradients for?
Only the Dots pattern fades from the mark color to transparent over a half-pixel interval (mark width to mark width plus 0.5 px). Grid uses two linear gradients, and Diagonal uses a repeating linear gradient; their stops do not have that same half-pixel interval. Check thin marks in the target browser.
Can I layer two patterns together?
The workspace composes one pattern per rule by design. CSS does allow comma-separated background-image layers, so after copying you can stack a second pattern by hand — the transparent regions in each layer are what let them combine.
Are my settings sent anywhere?
No. Everything is generated in the current browser tab with no account, and no value enters storage, logs, or analytics. Press Reset to bring back the default dots.

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