SVG Pattern Generator

Seamlessness is a geometry problem: any mark crossing a tile edge has to be mirrored on the opposite edge, or you get a visible seam every tile. The diagonal-lines tile, for example, draws small extra segments in two corners for exactly that reason. On the practical side, inlining the SVG as a data URI avoids an HTTP request, which matters because a background pattern is usually needed immediately at first paint. Keep patterns subtle — reduce opacity until you can read comfortably over them, and prefer smaller tiles for texture and larger ones only where the pattern is meant to be a feature.

Each pattern is drawn inside a square tile whose edge geometry is designed to line up with the adjacent copy. The CSS output percent-encodes that SVG into a data URI, which the browser then repeats via background-repeat.

Patterns are single-colour on a solid background — multi-colour or photographic textures are out of scope. The CSS data-URI form is convenient but adds bytes to your stylesheet rather than being cached separately, so for very large patterns an external SVG file is the better choice. Patterns also tile from the element’s top-left corner and do not scale with it, so the visual density changes as the element resizes.

A 40px polka-dot tile in blue on white produces a roughly 200-byte SVG and a one-line CSS rule that tiles evenly across any size of element.

1. Pick a pattern style.
2. Set the tile size — smaller tiles read as texture, larger ones as graphics.
3. Choose colours and lower the opacity until it sits behind your content.
4. Copy the CSS rule, or download the SVG file.

• Using a pattern at full opacity behind body text.
• Forgetting background-repeat, so the tile appears only once.
• Choosing a foreground and background with too little contrast to see.
• Inlining a very large pattern into CSS instead of linking an SVG file.

The SVG Pattern Generator builds seamless repeating backgrounds from ten pattern styles. Adjust the tile size, colours, line thickness and opacity, then take either a standalone SVG file or a CSS background rule with the pattern inlined as a data URI.

Web designers and developers adding texture to hero sections, cards and page backgrounds.

• Every tile is built so opposite edges match, so the repeat is genuinely seamless.
• CSS output inlines the SVG, so there is no extra HTTP request.
• Opacity control, so patterns sit behind text instead of competing with it.
• Vector output stays crisp on any display, unlike a tiled PNG.

• Adding subtle texture to a hero or section background.
• Creating a patterned header for a card or panel.
• Building a grid or dot background for a canvas-style interface.
• Replacing a heavy tiled PNG with a few hundred bytes of CSS.