SVG Blob Generator – Free Organic Shape Generator Online
Generate unique, smooth, organic SVG blob shapes in seconds. Adjust complexity, points, randomness and size. Download as SVG or PNG, or copy the SVG code directly into your project.
Shape Controls
Seed
Export
SVG Code
What Is an SVG Blob?
An SVG blob is a smooth, organic, free-form shape generated using mathematical curves — typically cubic Bézier splines. Unlike geometric shapes such as circles, squares, or polygons, blobs have irregular, flowing edges that feel natural and alive. They are a defining element of modern web design aesthetics.
Vector Format
SVG (Scalable Vector Graphics) is an XML-based format. A blob is defined as a single <path> element using smooth cubic Bézier commands. Because it is vector-based, it scales to any size — from a 16px favicon to a 4K background — without any pixelation or quality loss.
Organic Curves
Points are distributed around a center, each with a slightly randomised radius. Smooth Bézier control points are calculated between each pair of anchor points to produce fluid curves. The result is a shape that looks hand-drawn or natural, not computer-generated.
Fully Customisable
Every blob is defined by just four parameters: the number of anchor points, the randomness of their radii, the smoothness of the curves, and the overall size. Change any one of these and you get an entirely different shape. The seed value makes each shape reproducible — great for design systems.
How to Generate Blob Shapes
This tool creates unique organic SVG blobs in real time, entirely in your browser. No servers, no uploads, no waiting. Here's how to get the perfect blob for your project:
Adjust the Controls
Points — more anchor points create more complex, irregular shapes. Fewer points produce simpler, rounder blobs. Try 3–5 for simple shapes and 8–12 for detailed organic forms.
Randomness — controls how much each anchor point deviates from a perfect circle. Low values give near-circular shapes; high values give wild, spiky blobs.
Smoothness — controls the tension of the Bézier handles. Higher values create smoother, more rounded curves. Lower values introduce kinks and angular transitions.
Size — scales the blob relative to the canvas. Use this to make the blob fill more or less of the output.
Choose a Seed
The seed controls the random number sequence used to place anchor points. The same seed always produces the same blob shape with the same parameters — making your blobs reproducible across design iterations. Click 🎲 Random Seed to discover new shapes instantly.
Set Fill & Background
Choose a fill colour from the swatches or pick any custom colour using the colour picker. Toggle the background to preview your blob against different contexts — light, dark, or a transparent checkerboard.
Export Your Blob
Once you're happy with the shape, click Download SVG for a production-ready vector file, Download PNG for a rasterised image at 2× resolution, or Copy SVG Code to paste the raw SVG markup directly into your HTML, CSS, or React component.
How Designers Use SVG Blobs
SVG blob shapes have become a staple of modern UI and marketing design. Here are the most popular professional use cases:
Large, colourful blobs placed behind hero text create depth and visual interest without heavy imagery. They load in microseconds and look great at any screen size.
Clip a portrait or product photo inside a blob shape for a unique, editorial look. Use the SVG <clipPath> element to apply any blob as a mask.
Place an icon inside a coloured blob to create distinctive, visually varied feature cards and benefit sections — avoiding the grid-of-identical-circles look.
Organic blob shapes as section backgrounds or dividers break up the monotony of rectangular layouts and add a sense of flow to long-form landing pages.
Animate the SVG d attribute between two blob shapes using CSS @keyframes or the GSAP MorphSVG plugin for a mesmerising, living background effect.
An SVG blob file is typically 200–500 bytes. Compare that to a decorative background image at 50–500 KB. Blobs give rich visual decoration with almost zero page-load cost.
Benefits of Using SVG Backgrounds
When comparing SVG shapes to raster images or CSS-only decorations, SVG blobs win on almost every axis. Here is a direct comparison of what makes them the professional choice:
Infinitely Scalable
SVG is resolution-independent. Your blob looks pixel-perfect on a 4K retina display and on a 360px mobile screen — without serving multiple image sizes or using media queries for image sources.
Tiny File Size
A complete blob SVG is a text file of 300–600 bytes. This is 100× smaller than the equivalent PNG and 200× smaller than a JPEG photo. SVG backgrounds have virtually zero impact on page load time or Core Web Vitals.
Animatable
SVG path data can be transitioned and animated using CSS, JavaScript, or GSAP. A morphing blob background is a powerful branding tool that would be impossible with raster images at this file size.
Inline in HTML
SVG can be pasted directly into HTML as an inline element — no HTTP request needed. This eliminates a network round-trip entirely and allows JavaScript to manipulate the path data in real time.
Frequently Asked Questions
An SVG blob generator is a browser-based tool that creates smooth, organic, free-form vector shapes using Bézier curves. It lets you control the number of anchor points, the amount of randomness applied to each point, the smoothness of the connecting curves, and the overall size. The output is an SVG <path> element that can be used directly in any HTML, CSS, or design file.
Once you have generated a blob shape you're happy with, click the Download SVG button in the Export section. This will download a complete, production-ready .svg file to your device. You can also click Download PNG to get a high-resolution PNG image, or Copy SVG Code to paste the raw SVG markup directly into your HTML or CSS.
Absolutely. SVG blobs generated with this tool are free to use in any personal or commercial project with no attribution required. You can use them as background decorations, image masks, icon containers, section dividers, or hero elements. SVG is natively supported in all modern browsers and works inline in HTML, as an <img> tag, or as a CSS background-image.
Yes — that's one of SVG's core strengths. Because SVG blobs are defined mathematically as curves rather than pixels, they render crisp and sharp at any size on any display — including high-density Retina and 4K screens. There is no loss of quality when scaling an SVG blob from 50px to 5000px. This makes SVG significantly better than PNG, JPEG, or WebP for decorative shapes.
Yes. The downloaded SVG file can be opened in Figma, Adobe Illustrator, Inkscape, or Sketch and edited as any other vector shape. You can change the fill colour, add gradients or pattern fills, adjust individual anchor points, apply a stroke, or use it as a clipping mask for images. In code, you can manipulate the fill, stroke, and transform attributes directly in HTML or CSS.
The seed is the starting value for the random number generator that determines where each anchor point is placed. The same seed + the same settings always produce exactly the same blob shape. This makes blobs reproducible — if you find a shape you love, note the seed and settings and you can regenerate that exact blob any time. Click 🎲 Random Seed to explore new shapes quickly.
Completely free. No account, no download, no watermark, no usage limits. All blob generation happens inside your browser — no file or data is ever sent to a server. The generated SVGs can be used in personal or commercial projects without restriction.