Generate Organic SVG Blob Shapes Generate organic blob shapes as SVG with gradient fills and randomization.

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CSS Blob Generator

Generate organic blob shapes as SVG with gradient fills and randomization.

Randomize the shape

Click Randomize to generate new organic blob shapes.

Customize appearance

Adjust complexity, size, colors, and toggle gradient fill.

Copy the SVG

Preview the blob and copy the complete SVG code.

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What Is CSS Blob Generator?

The CSS Blob Generator creates organic, irregular shapes as SVG paths. Blobs are smooth, flowing shapes that add visual interest and a natural, organic feel to web designs. They are commonly used as background decorations, image masks, and decorative accents. This tool generates blobs programmatically using bezier curves with adjustable complexity (number of control points). Each click of the Randomize button creates a unique shape by varying the control point positions. You can customize the blob size, number of complexity points, and choose between solid color or gradient fill. The output is clean SVG code with optional gradient definitions, ready to use inline or as a background image.

Why Use CSS Blob Generator?

One-click randomization for infinite unique blob shapes
Adjustable complexity from simple to highly organic
Gradient fill option with two customizable colors
Clean SVG output ready for inline use or CSS backgrounds

Common Use Cases

Background Decorations

Add organic blob shapes as decorative background elements.

Image Masks

Use blob shapes as clip-path masks for images and content.

Hero Section Accents

Place gradient blobs behind hero content for visual depth.

Abstract Illustrations

Combine multiple blobs for abstract, organic illustrations.

Technical Guide

The blob generator creates SVG path elements using cubic bezier curves (C command). Points are distributed around a circle at equal angle intervals, with randomized radius values creating the organic irregularity. The bezier control points are calculated to create smooth curves between each point, ensuring the blob shape flows naturally without sharp corners. The complexity parameter controls the number of points—more points create more complex, detailed shapes. For gradient fills, an SVG linearGradient definition is included in the SVG defs section. The blob can be used inline as an SVG element, or converted to a CSS background using the data URI technique. For animations, the SVG path d attribute can be animated between different blob shapes for a morphing effect. Use the same number of control points for smooth morphing transitions.

Tips & Best Practices

1
Use 5-7 complexity points for natural-looking blobs
2
Apply gradient fills for more visually interesting shapes
3
Combine multiple blobs at different sizes and opacities
4
Convert to CSS background-image for use without inline SVG

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Frequently Asked Questions

Q Can I animate blob shapes?

Yes, use CSS or JavaScript to animate the SVG path d attribute for morphing effects.

Q How do I use a blob as a clip-path?

Convert the SVG path to a clip-path polygon or use an SVG clipPath element referencing the blob path.

Q Can I use the blob as a CSS background?

Yes, encode the SVG as a data URI and use it as a background-image value.

Q Why do blobs look different each time?

Each randomization generates new control point positions, creating a unique shape every time.

Q Can I create symmetrical blobs?

The generator creates organic asymmetrical shapes. For symmetry, modify the SVG by mirroring half the path.

About This Tool

CSS Blob Generator is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.