BYTETOOLS

Seamless Pattern Generator

Generate tileable background patterns — stripes, dots, grids, chevrons and more — with two-color controls, then export a PNG tile plus ready-made CSS.

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Spacing is snapped to a whole divisor so the tile contains a whole number of repeats — that is what stops a visible seam where the tile meets its neighbour.

Single tile (128 × 128)

Tiled preview

This box is filled by repeating the tile above. If you cannot spot where one tile ends, the pattern is seamless.

What is the Seamless Pattern Generator?

The ByteTools Seamless Pattern Generator draws repeating background tiles on a canvas: stripes, grid lines, checks, polka dots, crosses, triangles, chevron and herringbone.

  • Eight pattern types: stripes, grid, checks, dots, crosses, triangles, chevron and herringbone
  • Spacing snapped to an exact divisor of the tile, so there is never a visible seam
  • Tile sizes from 64 to 512 pixels with 0, 45, 90 and 135 degree angles
  • Two-color control with live background and foreground pickers
  • Side-by-side single tile and repeated surface preview
  • PNG export plus a copyable CSS rule with the tile as a data URI

How to use the Seamless Pattern Generator

  1. 1

    Pick a pattern type, a tile size and an angle for the stripes and grid lines.

  2. 2

    Set the background and pattern colors with the two color pickers.

  3. 3

    Drag the spacing slider, plus line width or shape size where the pattern uses them.

  4. 4

    Check the tiled preview panel — if you cannot see where one tile ends, it is seamless.

  5. 5

    Click Download PNG for the tile, or Copy CSS for a background-image rule with the tile inlined.

About the Seamless Pattern Generator

The ByteTools Seamless Pattern Generator draws repeating background tiles on a canvas: stripes, grid lines, checks, polka dots, crosses, triangles, chevron and herringbone. Every shape is computed as a pure function of the pixel coordinates modulo a period, and that period is snapped to an exact divisor of the tile so the artwork wraps perfectly across all four edges.

That snapping is the whole trick behind a seamless tile. If the spacing does not divide the tile evenly, a visible seam appears wherever one copy meets the next. Because the tool always picks the nearest whole divisor to your spacing slider, you can drag it freely and the tiled preview underneath will never show a join.

Rendering is 100% local in your browser — pixels are written directly into an ImageData buffer on your device and nothing is uploaded to any server. Export the tile as a PNG, or copy a ready-made CSS rule with the tile embedded as a data URI, which needs no extra image request at all when you ship it.

Frequently asked questions

What makes a pattern seamless?

A pattern is seamless when the artwork at each edge of the tile continues correctly into the opposite edge. This generator guarantees that by snapping the spacing to a whole divisor of the tile size, so a whole number of repeats always fits inside the tile.

How do I use a seamless tile as a CSS background?

Copy the CSS rule from this tool and paste it into your stylesheet. It sets background-image with the tile inlined as a data URI, background-repeat to repeat, and background-size to the tile dimensions, so the browser tiles it across the whole element.

Should I inline the pattern as a data URI or link a PNG file?

Small tiles are usually better inlined, because it removes an HTTP request entirely and the tile itself is tiny. Larger tiles inflate your CSS by roughly a third when base64-encoded, so download the PNG and reference it by URL instead.

Can I use these generated patterns commercially?

Yes. The tiles are generated procedurally from your own settings inside your browser, so there is no stock artwork or third-party licence involved. Use them in client work, products and paid designs without attribution.

Are the patterns created on a server?

No. Each tile is drawn pixel by pixel in your browser with the canvas API, and nothing is uploaded or fetched from any server. The PNG export is produced locally from the same canvas you are looking at.

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