Web & SEO

Blob Generator — Free SVG Blob Maker 2026

Generate random organic SVG blob shapes for your website. Adjust complexity, contrast, color and size, then copy SVG or CSS code.

Complexity: 8

Contrast: 50%

Blob Color

Size: 300px

SVG Code

CSS Background

How It Works

Set blob parameters
Randomize the shape
Copy the code

Understanding Blob Shapes in Web Design

Blob shapes have become a cornerstone of modern web design, adding organic warmth to otherwise rigid, grid-based layouts. These irregular, fluid forms evoke a sense of movement and friendliness that geometric shapes simply cannot achieve. From SaaS landing pages to personal portfolios, blobs appear as background decorations, image masks, and section accents across the web.

How Blob Generation Works

This generator creates blobs using polar coordinates. Points are distributed at equal angular intervals around a center, with each point's radius randomized within a range determined by the contrast slider. Higher complexity values add more points, creating more intricate shapes, while higher contrast makes the blob more irregular. The points are connected using smooth cubic bezier curves, producing the characteristic organic look. For complementary decorative elements, try our SVG wave generator.

Using Blobs in Your Projects

There are several ways to incorporate blobs into your designs. Use them as CSS background images via the generated data URI, as inline SVG elements for precise positioning, or as clip-path masks on images. Blobs work particularly well as hero section backgrounds when paired with low opacity values and complementary colors. Generate matching color schemes with our color palette generator for a cohesive design.

Tips for Effective Blob Design

Keep blobs subtle in production designs — use low contrast values and semi-transparent colors for backgrounds. Save high-complexity, high-contrast blobs for hero illustrations or featured graphics. Always ensure text placed over blobs maintains sufficient contrast for accessibility, and consider how blobs appear across different screen sizes.

Frequently Asked Questions

What is a blob shape in web design?

A blob is an organic, irregular shape that resembles a fluid droplet or amoeba. In web design, blobs are used as decorative background elements, image masks, section dividers, and button shapes. They add visual interest and soften otherwise geometric layouts, creating a more friendly and approachable aesthetic.

How are SVG blobs generated?

SVG blobs are created using polar coordinates with randomized radii. Points are placed at equal angles around a center, each with a radius that varies randomly within a range controlled by the contrast parameter. The points are then connected using smooth bezier curves to create a closed, organic-looking path.

Can I use blobs as CSS backgrounds?

Yes. You can use a blob SVG as a CSS background-image by encoding it as a data URI or by using inline SVG in your HTML. The generated CSS code provides a ready-to-use background-image property with the blob encoded as a data URI that you can paste directly into your stylesheet.

How do I make each blob unique?

Click the Randomize button to generate a new blob with a different shape each time. The generator uses random variation on the radius of each point, so every click produces a unique organic shape. You can also adjust the complexity slider to change the number of points, which affects the overall character of the blob.