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SVG Blob Generator

Generate unique blob shapes for modern UI design in seconds.

SVG blob generation

Create organic SVG blob shapes and abstract decorations.

Generate smooth, organic blob shapes for hero visuals, abstract backgrounds, decorative accents and UI illustration bases, then copy clean, editable SVG into your project. Every blob is built from a seed, so the same settings always recreate the same shape. Everything runs locally in your browser — nothing is uploaded and no external assets are referenced.

Local only Seeded & repeatable Editable SVG No upload
Settings

Blob settings

Adjust the controls and click Generate Blob. Randomize picks a fresh seed and a safe combination; Reset restores the defaults.

Points—
Seed—
Irregularity—
Smoothness—
SVG size—
Status—
Preview

Live blob preview

Click Generate Blob to preview the result.

Generated locally Editable SVG Seeded deterministic blob Transparent background: off No upload No external assets
Output

SVG markup

The generated SVG appears here. It is editable, dependency-free markup — copy it into your project or download it as a file.

How It Works

SVG Blob Generator creates organic, abstract blob shapes entirely in your browser. Unlike the Edit and Manipulate tools, it does not take an existing SVG as input — instead it builds brand new SVG markup from the settings you choose. Set the canvas size and blob size, the complexity (number of points), irregularity, smoothness and a numeric seed, choose fill, stroke and background colors, opacity and rotation, then click Generate Blob. The tool places points evenly around the canvas center, varies each point's radius and angle using a seeded pseudo-random generator, and connects them into a closed, smooth path using cubic Bezier curves derived from the points. Because generation is driven by the seed rather than the browser's Math.random, the same settings and seed always recreate exactly the same blob — so your shapes are repeatable. Irregularity controls how much the radius varies (0 is a near-perfect circle, higher values are more organic), and smoothness controls how rounded the curve is between points. The output appears as clean, readable SVG markup you can copy or download. There is no upload, no API, no AI and no external assets — the markup is self-contained and stays editable.

Use Cases

  • Creating a soft organic blob as a hero visual or backdrop behind a product screenshot or headline on a landing page
  • Generating abstract decorative shapes to layer behind cards, avatars or feature sections in a modern UI
  • Producing an organic badge or container shape for testimonials, pricing highlights or call-to-action blocks
  • Building repeatable blob assets for an illustration set by reusing the same seed and tweaking colors so the shapes stay consistent
  • Prototyping background decorations quickly with Randomize, then exporting the editable SVG to fine-tune the path or colors by hand in your own project

FAQ

Does SVG Blob Generator need an SVG file as input?

No. This is a generator, not an editor. It does not take an existing SVG and does not show a source input box. You choose the blob settings and the tool produces brand new SVG markup from scratch. The only SVG you will see is the generated output, which you can copy or download.

What does the seed do, and are blobs repeatable?

The seed is a number that drives a deterministic pseudo-random generator. Generated SVG blobs are deterministic from the selected settings and seed, so you can recreate, copy, edit, and reuse the markup in your own projects. The same settings and seed always produce exactly the same path, while changing the seed produces a different organic variation with the same overall character.

What do irregularity and smoothness control?

Irregularity controls how much each point's distance from the center varies: at 0 the blob is a near-perfect circle, and as it increases the outline becomes more organic and uneven, while always staying within the blob size so it never overflows. Smoothness controls the curve between points: low values give a more angular, faceted outline and high values give soft, rounded curves.

How does the transparent background option work?

When Transparent background is enabled, the generated SVG does not include the solid background rectangle at all — only the blob path is drawn. The output is therefore truly transparent and will show whatever sits behind it when placed on a page. In the preview you can toggle a checkerboard backdrop to see the transparency clearly; that checkerboard is only a preview aid and is never written into the SVG.

Can I edit the generated SVG afterwards?

Absolutely. The output is plain, readable SVG markup with a single path element and standard fill, stroke and opacity attributes. You can change colors, adjust the path, swap the fill or drop the blob into a larger document. The markup is dependency-free and safe to edit by hand.

Is anything uploaded to a server?

No. SVGTrim generates SVG blobs locally in your browser. No files are uploaded, and the output remains editable SVG markup. There is no API call, no AI involved and no external asset is referenced by the generated file.