Random Blob SVG
Generate a procedural SVG blob shape from a seed.
Overview
The Random Blob SVG generator produces a smooth, organic-looking SVG blob shape from a seed string. Type a phrase or click "randomise" and the tool emits a single <svg> element with a closed Bezier path you can drop into a hero section, a section divider or a decorative background — perfect for the design trend of soft amorphous shapes.
This generator is aimed at frontend designers, landing-page builders and marketers who want a unique decorative shape without firing up Figma. Long-tail searches like "svg blob shape generator from seed", "css organic blob background" and "deterministic blob from string" all resolve here.
How it works
A blob is a closed Bezier curve sampled around a circle. The tool places N anchor points evenly around a unit circle, then perturbs each radius by a seeded noise function so the resulting outline wobbles in and out by a controllable amplitude. The randomness comes from a deterministic PRNG seeded with the FNV-1a hash of your input string, which means the same seed always produces the same blob — handy when you want a brand-stable shape.
To smooth the outline, the tool computes Catmull-Rom control points between adjacent anchors and converts them to cubic Bezier segments. The result is a single <path d="..."> with no straight edges or visible kinks. Number of anchors and wobble amplitude are exposed as sliders, so you can range from "near-perfect circle" to "splatter".
Examples
Seed "hero" → soft 8-point blob, fills a 500x500 viewport
Seed "blue-team" + amplitude 0.4 → wavy 12-point shape
Same seed re-run → identical output every time
Anchors 6, amplitude 0.6 → punchy splash shape
FAQ
Is the same seed reproducible?
Yes. The seed is hashed deterministically and feeds a seeded PRNG, so the SVG path bytes are identical for the same parameters.
Why a deterministic PRNG and not a cryptographic source?
Reproducibility is the headline feature — you want the same blob across builds. Cryptographic randomness would defeat that.
Can I edit the result?
Yes. The path is plain SVG. Paste it into Figma, Inkscape or any vector editor and tweak control points by hand.
Will it tile or repeat cleanly?
Each blob is a single closed shape, not a pattern. For repeating textures see the SVG Pattern Gallery or Noise SVG tools.
Is the SVG safe to inline?
Yes. The output is a single element with no scripts or external references, so it is safe to embed in HTML, email and PDF.