How It Works

This tool generates a closed vector path that looks “organic” by sampling points around a circle and slightly randomizing their radius. Those points are then converted into smooth Bézier curves so the final outline feels natural and rounded instead of jagged. The result is a single <path> element inside a minimal <svg> wrapper.

Under the hood, the generator starts with an ideal circle (a stable base) and adds controlled noise (variance) to create pleasing asymmetry. The smoothing step matters: instead of connecting points with straight lines, the tool computes curve segments that pass through the points while keeping tangents consistent. This produces the “blob” look that designers expect—rounded bumps rather than polygon corners.

Generation steps

• 1) Choose canvas size: Set the SVG width and height (in pixels) to match your intended usage. The tool also uses these values to pick a safe radius so the blob stays inside the canvas.
• 2) Pick complexity: The number of points controls how detailed the blob looks. Fewer points create a simpler, sticker-like silhouette; more points add subtle bumps and variation.
• 3) Set variance: Variance determines how far each point can drift from the base radius. Lower values give calm, friendly blobs; higher values create dramatic, spiky silhouettes.
• 4) Optional seed: Provide a seed number to reproduce the exact same blob. Leave it blank for a fresh random shape each time.
• 5) Output SVG: The generator returns a complete SVG snippet with a path that you can preview, copy, and download.

If you plan to use the blob as a background shape behind text, consider leaving extra padding around the edges by using a slightly smaller canvas than the container or by reducing variance. This helps prevent the blob from colliding with UI elements when the layout wraps on smaller screens.

For developers, the output works equally well as inline SVG in HTML, as a standalone SVG file in your assets folder, or as a data URI (after encoding) for CSS backgrounds. Many teams keep a small set of blobs with known seeds as reusable design tokens.

Key Features

Instant random blobs with preview

Generate a new blob in one click and see a live preview alongside the SVG code. This makes it easy to iterate until the shape “fits” your layout. Previewing the blob at the same size you intend to ship helps you avoid surprises later—especially when the shape sits near typography or UI controls.

Reproducible results with seeds

When you need consistency across environments (design → staging → production), a seed ensures the same input settings produce the same blob every time. Seeds are also useful for A/B tests: you can switch between a few known shapes without relying on unpredictable randomness.

Adjustable size and complexity

Control the SVG canvas size and the number of points used to form the blob. Create minimal shapes for icons or more nuanced silhouettes for backgrounds and illustrations. A practical workflow is to start with a moderate point count, then increase it only if the blob looks too geometric at large sizes.

Color controls for fast styling

Use a random fill color for exploration or set a custom hex color when you already have a brand palette. If you prefer full control in code, you can set the fill to currentColor and drive the color from CSS. You can also add opacity for subtle backgrounds or apply gradients in your design tool after downloading.

Copy and download options

Copy the generated SVG code directly into your project or download it as an .svg asset for design tools, repositories, and build pipelines. Downloading is convenient when you want to drag-and-drop the file into Figma, store it in a media library, or share it with teammates.

In addition to these core features, SVG output supports accessibility best practices. If the blob is purely decorative, you can add aria-hidden="true" when embedding inline. If it conveys meaning, you can include a title and descriptive text so screen readers have context.

Use Cases

• Website hero sections: Place a soft, organic shape behind headings or CTAs to add depth without distracting patterns.
• Card and button accents: Use small blobs as decorative corner elements or background highlights, especially on feature grids.
• Brand illustrations: Combine blobs with icons, photos, or gradients to create a distinctive visual identity that still feels lightweight.
• UI onboarding screens: Add friendly, modern shapes that break up rigid layouts and guide attention toward key steps.
• Presentation graphics: Export SVG blobs into slide decks or design mockups for a cohesive, vector look across marketing materials.
• App backgrounds: Use large blobs with low opacity to create subtle texture behind content, improving visual hierarchy.
• Product screenshots: Frame screenshots inside blobs or use them as callout backplates for annotations and labels.
• Social media templates: Keep a few seeded blobs as reusable elements in quote cards, announcement graphics, and banners.

Whether you’re designing a landing page, building a component library, or creating social visuals, organic SVG blobs provide a quick way to make layouts feel more human and less “boxed in.” They pair well with minimalist typography because the shape adds personality without adding noise.

Blobs are also surprisingly versatile in developer workflows. For example, you can ship a blob as an SVG file and recolor it at runtime using CSS filters, or you can inline it and animate subtle movement using CSS transforms. In design systems, blobs can serve as a consistent “brand texture” that appears across pages without repeating a single rigid motif.

Optimization Tips

Keep complexity aligned with size

For very small blobs (icons or tiny badges), use fewer points so the silhouette stays readable. For large backgrounds, increase the point count slightly to avoid overly simple edges. The goal is to keep the blob looking intentional at the scale where users will actually see it.

Use the seed for design-system consistency

If blobs are part of a design system, store the seed and settings in your docs. This lets anyone regenerate the same asset and avoid “almost the same” shapes across pages. A common pattern is to define a handful of “approved” blobs (for example, three calm and two bold) and reuse them across the product.

Style with CSS for flexibility

After copying the SVG, consider removing inline attributes and controlling fill, stroke, and opacity from CSS variables. This makes color theming and dark mode support easier. You can also set the SVG to preserveAspectRatio="none" when you deliberately want it to stretch to fit a responsive container.

For performance, keep decorative blobs small and avoid stacking too many large SVGs above the fold. If you need multiple blobs on a page, reuse a few seeded shapes instead of generating dozens of unique ones. This improves caching and reduces the amount of DOM nodes and path data the browser must parse.

If you plan to animate blobs, prefer subtle transforms (translate/scale/rotate) or opacity changes rather than continuous path morphing. Path morphing can be heavier, especially on mobile devices. When morphing is necessary, keep point counts consistent between shapes.

FAQ