Generate Random Planets in Your Browser — Free Procedural Art Toy
Procedural generation is the closest thing code has to gardening: set a few rules, add randomness, and watch something grow that nobody designed. Planets are the perfect subject — a sphere, some noise-driven terrain, an atmosphere tint, and suddenly it has a personality.
You don't need to install anything to play with this. Here's what procedural planet generators are good for, and a free one that runs in any browser.
Worldbuilding and TTRPG prompts
Stuck naming the third planet in your sci-fi campaign? Generate until one looks right, then let the visuals write the lore: a rust-red world with thin ice caps suggests a very different civilisation than a storm-wrapped ocean planet. Randomness is a better brainstorming partner than a blank page, because reacting is easier than inventing.
How the generation works
Most browser planet generators layer noise functions — smooth randomness — to fake terrain: low frequencies make continents, higher frequencies add coastline detail, and thresholds decide what becomes ocean, land, or ice. A colour palette and an atmosphere glow finish the illusion. Every seed produces a different world, which is why no two clicks match.
It's also just a good screen break
Not everything needs a productivity justification. Clicking 'generate' a dozen times and watching new worlds appear is genuinely calming — closer to a lava lamp than a tool. Bookmark it for the moments between meetings.
Try a free one now
Planet Generator on Cloudmaking creates a new procedural planet on every click, right in your browser. No download, no signup, free. If you land on a world you love, screenshot it — that exact planet may never exist again.
Frequently asked questions
Is there a free planet generator that runs in the browser?
Yes — Cloudmaking's Planet Generator runs in any modern browser with nothing to install. Each click generates a new unique procedural planet, free.
Can I use generated planets in my TTRPG or story?
Absolutely — they work well as visual prompts for campaign worlds, book settings, or character homeworlds. Screenshot the ones you want to keep.
Why does every planet look different?
Each planet starts from a random seed fed through layered noise functions, so terrain, colours, and atmosphere combine differently every time.