SVG Blob Generator — Random Organic Shapes Free
Generate random organic SVG blob shapes for backgrounds and decorative elements. Adjustable complexity, randomness, color. Copy-paste SVG.
About SVG Blob Generator
SVG blobs are organic, asymmetric closed shapes — the inverse of geometric circles and squares. They became a 2018+ design trend on landing pages, mobile-app illustrations, and marketing graphics, providing visual interest without the rigid feel of grid-aligned shapes. The ZTools SVG Blob Generator produces random blobs via mathematical perturbation of a circle (n control points placed on a circle, each radius offset by random amounts), with adjustable complexity (number of bumps), randomness (irregularity), and color/gradient. Output is a single `<svg>` element ready to paste into HTML, React (as JSX), or design tools.
Use cases
- Landing-page hero backgrounds. A large pastel blob behind hero text adds movement and breaks the rectangular grid. Stripe, Notion, Slack marketing pages all use this pattern.
- Avatar / profile picture backdrops. Place a circular avatar over a blob shape for a softer, more organic profile-card look. Common in Dribbble shots and modern marketing.
- Decorative section dividers. Replace flat horizontal section breaks with blob-shaped transitions. Adds rhythm to long-scroll pages.
- Empty-state illustrations. Pair a blob with a centered icon for friendlier "no data" / "all done" / "nothing here yet" screens. Less sterile than plain icon-on-white.
How it works
- Set complexity. 3–20 control points. More points = more bumps. 6–10 is the visual sweet spot.
- Set randomness. 0–100%. 0 = perfect circle; 100 = wild asymmetry. 30–60% is "blob-like".
- Pick color or gradient. Solid fill, two-stop linear gradient, or three-stop radial gradient.
- Re-roll for variation. Each click generates a new random blob with the same parameters — sample 5–10 and pick the best.
- Copy SVG. Single `<svg>` element with `<path>` — paste into HTML / JSX / design app. No external dependencies.
Examples
Input: 8 points, 50% randomness, indigo
Output: Soft asymmetric blob suitable for hero background — saved as inline SVG.
Input: 15 points, 80% randomness, gradient
Output: Highly irregular blob with light-to-dark gradient — decorative accent shape.
Input: 6 points, 30% randomness, currentColor
Output: Subtle organic shape; inherits text color via currentColor.
Frequently asked questions
Why SVG instead of PNG?
SVG scales infinitely without pixelation, has tiny file size (a blob is < 1KB), inherits CSS colors via currentColor, and animates trivially. PNG fixes you to one resolution and color.
How does the algorithm work?
N control points are placed on a circle, each at a slightly randomised distance from center. A Bézier curve smoothly connects them, producing the closed organic shape.
Can I animate the blob?
Yes — animate the SVG path's `d` attribute via SMIL or, more commonly, with a JS library that morphs between two blob shapes (e.g. blobs.app, or a custom morph-between-paths function).
Will it work in old browsers?
SVG support is universal (IE9+, all modern browsers). The blob path is just `<path d="...">` — works everywhere SVG works.
Can I edit the blob in Figma?
Yes — paste the SVG into Figma; it converts to a vector shape you can edit point-by-point.
Are blobs accessible?
They're decorative — add `role="presentation"` and `aria-hidden="true"` to the SVG so screen readers skip them.
Pro tips
- Generate 5–10 blobs per design and pick the best — randomness means the first roll is rarely the best.
- Use `aria-hidden="true"` on decorative blobs so screen readers skip them.
- Keep blob complexity ≤ 10 for hero backgrounds; more bumps look noisy at large sizes.
- Pair with `currentColor` and CSS variables for theme-aware blobs that change in dark mode.
- For animated morphing, use a library like flubber.js to interpolate between two blob `d` attributes.
Reviewed by Ahsan Mahmood · Last updated 2026-05-06 · Part of ZTools.
For the full,
formatted version of this page, please enable JavaScript and reload
https://ztools.zaions.com/svg-blob-generator.