How to Create Custom Blob SVG Shapes for Backgrounds
The Blob Shape Generator creates complex, multi-lobed organic shapes that go beyond simple blobs. While basic blobs are smooth and rounded, blob shapes can have more edges, sharper curves, and wilder randomness — ideal for abstract hero backgrounds, section accents, and creative image frames.
- Generate unique multi-lobed blob shapes with SVG.
- Covers blob shapes vs basic blobs.
- Covers customization options.
- Covers using in web design.
- Covers using as clip-path masks.
Blob Shapes vs Basic Blobs
The Blob Generator creates smooth, simple organic forms. The Blob Shape Generator adds more control: edge count (how many lobes the shape has), growth (how far lobes extend from center), and randomness (how irregular the shape becomes). More edges create star-like or amoeba-like forms. Lower edge counts create leaf or petal shapes.
Customization Options
Adjust the number of points/edges to control complexity — 3 creates a triangle-ish blob, 6 creates a flower-like shape, 12 creates an irregular circle. Growth controls how far each lobe extends from the center. Randomness introduces asymmetry — low values create symmetric shapes, high values create wildly organic forms. Each generation is unique.
Using in Web Design
Export the SVG and position it with CSS:
background-size animation or @property registered custom properties instead..hero-bg {
position: absolute;
top: -20%; right: -10%;
width: 60vw; height: 60vw;
opacity: 0.1;
filter: blur(40px);
}
The blur and low opacity create an atmospheric background glow. Layer multiple blob shapes at different sizes and positions for depth. Use mix-blend-mode: overlay or soft-light for interesting color interactions with the content beneath.
Using as Clip-Path Masks
Convert the blob's SVG path to a CSS clip-path to mask photographs into organic shapes:
.organic-photo {
clip-path: path('M...');
}
This frames photos in unique, non-rectangular shapes — much more visually interesting than simple circles or rounded rectangles for portfolio and agency sites.