For prototyping

Prototype ideas at the speed of thought

Spin up clickable, real-looking product concepts from a prompt. Test flows, demo to stakeholders, and throw them away just as fast.

What you can build

Clickable concept

A working flow you can click through — not a static mockup.

App dashboard mock

Realistic data views to pressure-test layout and hierarchy.

Landing experiments

Spin up variants to A/B your message before you commit.

Idea → demo fast

Describe the flow and get something real to click in minutes.

Iterate freely

Try ten directions in the time a mockup takes — just keep asking.

Share instantly

Publish a live link so stakeholders can try it, not just view it.

Prototype your next idea

Go from concept to clickable demo with SiteFast — instantly.

Start building free