How are SVG blobs generated?

Blobs are created by placing points around a circle, randomizing their distance from the center, then connecting them with smooth curves using Catmull-Rom or cubic Bezier interpolation.

SVG Blob Generator — Free Tool

What Is the Blob Generator?

The Blob Generator creates organic, irregular shapes using SVG. Adjust complexity, contrast, and size to generate unique blob shapes for backgrounds, decorative elements, and hero sections.

Why Use This Tool?

Organic shapes soften rigid grid-based layouts and add visual interest. Hand-drawing SVG blobs is tedious and inconsistent. This generator produces smooth, randomized shapes that you can customize and export as SVG code instantly.

How to Use This Blob Generator

Adjust complexity — Use the slider to control how many points define the blob shape — more points create more organic, irregular shapes.
Set the randomness — Increase randomness for wild, organic shapes or decrease for rounder, more predictable blobs.
Choose a fill color — Pick a solid color or gradient fill for your blob.
Export as SVG or CSS — Copy the SVG path data for inline use or the CSS clip-path for masking elements. SVG gives you a standalone shape; clip-path masks existing content.

Tips and Best Practices

→ Use blobs as section backgrounds. A large, pastel-colored blob behind content sections adds visual interest without distracting from the content.
→ Animate blob morphing. Use CSS keyframe animation to transition between blob shapes for a dynamic, organic background effect.
→ Combine blobs with gradients. Apply a gradient fill to your blob for extra visual depth — especially effective for hero sections and feature highlights.
→ Keep blobs subtle in professional designs. Use low-opacity blobs (20–40%) as background accents. Full-opacity blobs work better for illustration-heavy or playful designs.

Frequently Asked Questions

What's the difference between this and the Blob Shape Generator?

This tool focuses on simple, single-color blob shapes. The Blob Shape Generator offers additional options for gradients, multiple blobs, and animated blob transitions.

Can I use these blobs commercially?

Yes. Generated shapes are created algorithmically and are not copyrighted. Use them freely in any personal or commercial project.

What format is the output?

SVG — a vector format that scales to any size without quality loss and has tiny file sizes compared to raster images.

What is a blob shape in web design?+

A blob is an organic, irregular rounded shape — think amoeba or cloud-like forms. In web design, blobs are used as decorative background elements, image masks, section dividers, and illustration accents. They add visual softness and personality to layouts.

How do I create blob shapes with CSS?+

The simplest approach is using border-radius with irregular values (e.g., border-radius: 30% 70% 70% 30% / 60% 40% 60% 40%). For more complex shapes, use SVG paths or CSS clip-path with polygon/path values generated by tools like this one.

Can blob shapes be animated?+

Yes, SVG blobs can be animated by morphing between path values using CSS transitions or JavaScript libraries like GSAP. CSS border-radius blobs can be animated with keyframes by transitioning between different border-radius values. Both create an organic, breathing effect.

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Built by Derek Giordano · Part of Ultimate Design Tools

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