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SVG Shape Generator

Generate highly customizable SVG blobs, waves, polygons, and stars instantly. Copy the raw markup or download the file.

Updated

What is the SVG Shape Generator?

The SVG Shape Generator is a powerful, browser-based design utility that allows developers and designers to instantly create customizable vector graphics. Whether you need an organic blob for a hero section, a mathematical sine wave to act as a page divider, or geometric primitives like polygons and stars, this tool handles the complex path generation for you.

Scalable Vector Graphics (SVG) are resolution-independent, incredibly lightweight, and easily stylable with CSS. Rather than searching through stock asset libraries or opening heavyweight design software like Illustrator or Figma, our SVG Shape Generator lets you dial in the exact parameters you need and immediately grab the raw code.

What Can You Create?

  • Organic Blobs: Smooth, randomized splines perfect for playful backgrounds, profile image masks, or abstract illustrations.
  • Waves: Clean sine waves that can act as section dividers, water animations, or footer accents.
  • Polygons: Symmetrical shapes ranging from simple triangles and hexagons to complex 20-sided icosagons.
  • Stars: Highly adjustable multi-pointed stars where you control the sharpness and depth of the inner points.

Everything operates 100% in your browser. Once your shape looks right, you can copy the raw <svg> HTML tag directly to your clipboard or download it as an .svg file to drop into your project assets folder.

How it works

The SVG Shape Generator uses pure JavaScript to calculate and construct mathematical SVG <path> strings in real-time. It requires no server-side processing, ensuring your design adjustments render instantly.

The Generation Process

  1. Select a Shape Type: Choose between Blob, Wave, Polygon, or Star.
  2. Adjust Shape Properties: Every shape has unique parameters that dictate its geometry.
  • Blobs use a seeded pseudo-random number generator (Mulberry32) combined with a tension-based cubic Bezier spline algorithm. You can adjust the number of anchor points and the variance (randomness) of their placement.
  • Waves calculate a traditional sine wave across the X-axis. Adjusting peaks alters the frequency, amplitude changes the height, and phase offsets the starting position.
  • Polygons & Stars use basic trigonometry (sine and cosine functions) wrapped around a central pivot point to calculate exact coordinate mapping based on the number of sides/points requested.
  1. Define Styling: Choose your fill and stroke colors using the integrated color pickers, define the stroke width, and apply a baseline rotation if desired.
  2. Export: As you tweak the sliders, the tool continuously updates the SVG code. Click Copy SVG Code to grab the inline HTML markup, or Download to save it as a standalone graphic file.

Understanding the Output Code

The tool generates standard SVG markup optimized for web use. It utilizes viewBox="0 0 width height" to ensure the shape scales perfectly within its container, no matter what height or width you set in CSS.

For shapes like waves and polygons, it plots points using standard Line (L) commands. For organic blobs, it utilizes complex Cubic Bezier (C) curves to ensure perfectly smooth tension across randomly generated coordinates.

Examples

Organic Blob Background

Creating an organic, smooth blob shape to be used as a backdrop behind a user profile image.

Type: Blob | Points: 8 | Variance: 25% | Seed: 142 | Fill: #e879f9
 
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500"><path d="M421,250 C421,310 390,360 330,400 C270,440 180,410 130,350..." fill="#e879f9" stroke="none" /></svg>

Curved Section Divider

Generating a seamless wave to act as a transition between two different colored sections on a landing page.

Type: Wave | Peaks: 2.5 | Amplitude: 45px | Fill: #1e293b | Close Path: True
 
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500"><path d="M 0.00,250.00 L 3.33,251.20 L 6.67,252.40... L 500,500 L 0,500 Z" fill="#1e293b" stroke="none" /></svg>

Stroked Star Icon

Creating a classic 5-pointed star with an empty fill and a thick outer stroke for UI iconography.

Type: Star | Points: 5 | Inner Radius: 38% | Fill: none | Stroke: #fbbf24 | Stroke Width: 12px
 
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500"><path d="M 250.00,25.00 L 300.20,150.50 L 435.50,150.50..." fill="none" stroke="#fbbf24" stroke-width="12" /></svg>

Frequently asked questions

Can I use these SVGs for commercial projects?

Yes! Every SVG generated by this tool is 100% royalty-free and exists in the public domain. Because you are generating mathematical data, there are no copyrights attached. You can use these shapes freely in commercial websites, client projects, logos, print materials, and digital products without any attribution.

Why should I use an SVG instead of a PNG or JPG?

SVG (Scalable Vector Graphics) is a text-based image format that describes shapes mathematically. Unlike raster images (PNG/JPG) which get pixelated and blurry when scaled up, SVGs remain perfectly crisp at any size—from a tiny mobile screen to a giant billboard. Furthermore, SVGs typically result in much smaller file sizes and their properties (like colors) can be animated and manipulated using CSS and JavaScript.

Are the blob shapes truly random?

The blobs are generated using a "seeded" pseudo-random number generator. This means that while they look organic and randomized, a specific "Seed" number will always produce the exact same blob shape. If you accidentally lose a shape you liked, as long as you remember its seed and parameter values, you can regenerate it perfectly. Use the "dice" icon next to the seed input to quickly cycle through new random shapes.

How do I change the color of the SVG after exporting?

If you copied the raw SVG code into your HTML, changing the color is incredibly easy. You can change the fill="#hexcode" or stroke="#hexcode" attributes directly in the HTML tag. Alternatively, you can change the attributes in the SVG to fill="currentColor", which allows the SVG to automatically inherit the text color of its parent container via CSS, making hover effects and dark-mode styling effortless.

How do I make the wave shape span my entire screen?

When you export the SVG, the <svg> wrapper element contains a viewBox attribute. By default, the SVG code generated by the tool is set to width="100%" and height="100%". If you drop this into a container div that spans the full width of your viewport (e.g., width: 100vw;), the SVG wave will scale beautifully to fit the space without distorting or pixelating.

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