What Is the Blob Shape Generator?
A generator for single organic blob shapes. You set how many points the outline has, how irregular it is, its size, a solid colour or two-colour gradient, and opacity; the tool draws a smooth closed curve through those points and gives you the SVG, a downloadable .svg file and a CSS clip-path. Each shape comes from a numbered seed, so the same settings always reproduce the same blob.
Why Use This Tool?
Modern web design frequently uses organic shapes as background elements, section dividers, and decorative accents. This tool makes one shape at a time without illustration software; layering several is done by stacking the exported shapes in your own markup.
How to Use This Blob Shape Generator
- Adjust the complexity — Control the number of anchor points — more points create more detailed, irregular shapes.
- Set the randomness — Higher randomness produces wilder, more organic shapes. Lower values keep shapes smoother and more symmetrical.
- Pick a fill color or gradient — Choose a solid colour or a two-colour diagonal gradient, and lower the opacity slider for a translucent fill.
- Export as SVG or CSS — Copy the SVG markup, download it as an .svg file, or copy the CSS clip-path to mask an HTML element into the blob shape.
Tips and Best Practices
- → Use blobs as image masks. Apply a blob's clip-path to an
<img> element to crop a photo into an organic shape. The path is in pixels, so give the element the same width and height as the blob (the copied CSS includes them); for a shape that scales with its container, use the SVG as a mask image instead.
- → Layer multiple blobs for depth. Export two or three blobs with different sizes, colours and opacities and stack them with absolute positioning for a layered background.
- → Animate blob morphing. Blobs made with the same Complexity setting have the same number of path commands, so you can morph between two of them. CSS animation of the d property works in Chrome, Edge and Firefox but has no effect in Safari (MDN compatibility data), so use SMIL <animate> or a JavaScript library where Safari matters.
- → SVG blobs are resolution-independent. The outline is a true curve (one cubic Bézier segment per point), so it stays smooth at any size or screen density.
Frequently Asked Questions
Which CSS or SVG properties produce the smoothest blob animations?
Morph the path itself between two shapes that have the same number and type of commands; blobs from this tool with the same Complexity qualify. You can animate the d attribute with SMIL or a JavaScript animation library, which works everywhere, or the CSS d property, which works in Chrome, Edge and Firefox but has no effect in Safari. A CSS clip-path: path() can be animated the same way when both paths match. Morphing between shapes with different point counts needs a library that resamples the paths.
How do I use blobs as section dividers?
Position the SVG absolutely between two sections and use CSS to control its placement. Many designers rotate blobs 180° and use them as wave-like transitions between content areas.
Are the SVG outputs optimized?
The output is compact: one move command plus one cubic Bézier segment per point, with coordinates rounded to one decimal place. A 6-point blob at 400 px is a path of about 210 characters. If you add your own attributes, the SVG Optimizer can tidy the file further.
What is a blob shape generator?+
A blob shape generator creates random, organic shapes as SVG paths. This one places points around a circle at varying distances, then draws a smooth Catmull-Rom curve through them as cubic Bézier segments. The shapes are seeded: the same seed and settings always give the same blob, and Random picks one of 10,000 seeds.
How do I use blob shapes in CSS?+
Two main approaches: use the blob's SVG as an inline element or background image, or use the clip-path property with the blob's path data to mask HTML elements. The clip-path approach works directly on divs and images, while inline SVGs give you more styling control.
Can I animate blob shapes?+
Yes, by transitioning between two path values with the same structure, such as two blobs made at the same Complexity. Use SMIL or a JavaScript animation library (GSAP's MorphSVG plugin, for example) for support in every browser. CSS @keyframes on the d property works in Chrome, Edge and Firefox, but Safari parses it without applying it.
What is the difference between this and the blob generator?+
The Blob Generator has the same point count, seed, size, colour, gradient and opacity controls but no Randomness slider, so its shapes always vary by the same amount. This tool adds the Randomness control, a CSS clip-path output and an SVG download.
Can I use blobs in CSS?+
Yes — export the SVG and use it as a CSS background-image with url('data:image/svg+xml,...'), as a clip-path source, or inline it directly in your HTML.
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