Best Free Prototyping Tools in 2026

"Free" means different things to different tools. Some give you a 14-day trial and call it free. Others give you one project and lock everything else. The tools below all have genuinely free plans — meaning you can actually prototype something without a credit card.

1. Figma — Best free prototyping overall

Figma's free plan gives you unlimited drafts and up to 3 Figma files in your starter team. That's enough for real prototyping work. You get click-through flows, overlays, interactive components, scroll triggers, and variables — all on the free plan.

The limit isn't features, it's the file cap. If you're learning, building a portfolio, or doing freelance work with a small scope, you won't hit the ceiling. The free plan also includes Figma's dev mode inspect, which means your prototype can double as a handoff file.

What's free: Unlimited personal drafts, 3 team files, full prototyping features, shareable links. What's not: Unlimited team files, branching, analytics, advanced sharing controls.

Start with Figma Free

2. Penpot — Best fully free option

Penpot is open-source and free with no project limits, no seat caps on the cloud version, and no features locked behind a paywall. The prototyping layer covers basic flows, transitions, scroll behavior, and overlays — similar to where Figma's prototyping was a few years ago.

It's not quite at Figma's feature level, but it's close enough for most standard user flow work. And if you self-host it (which is free), you have complete control over your data with no vendor dependency.

What's free: Everything. Unlimited projects, unlimited team members, all features. What's not: Nothing — it's fully free.

Try Penpot Free

3. Marvel — Best for quick shareable prototypes

Marvel's free plan gives you one active project with unlimited screens. For a single product, client pitch, or user test, that's often all you need. You connect Figma frames or upload images, draw hotspots, and share a link.

There's no complexity here. Marvel's prototyping is click-through only — no variables, no conditional logic, no micro-animations. What you get is dead-simple setup and a prototype link you can share in under 5 minutes.

What's free: 1 project, unlimited screens, hotspot-based prototyping, shareable links. What's not: Multiple projects, team features, advanced integrations.

Try Marvel Free

4. Uizard — Best free option for non-designers

Uizard's free plan gives you 3 projects and includes AI screen generation, basic prototyping flows, and collaboration. For a product manager or founder who needs to prototype an app idea quickly, the free plan covers enough ground to be genuinely useful.

The prototyping is basic — screen-to-screen navigation with transitions — but the speed from idea to clickable prototype is faster here than anywhere else on this list. The AI generation shortens the time between a description and a shareable mockup.

What's free: 3 projects, AI screen generation (limited), basic flows, sharing. What's not: More AI credits, additional templates, export features.

5. Framer — Best free option for portfolio/marketing prototypes

Framer's free plan lets you publish one site with Framer branding. The prototyping features are all available — you're limited by publishing, not by the feature set. For building a portfolio or a marketing landing page prototype, the free plan works.

The Framer canvas is more expressive than Figma's for motion and interaction. If your prototype needs to feel like a live, polished website experience rather than a clickable wireframe, Framer's free plan gets you there.

What's free: Full design and prototyping features, 1 published site (with Framer branding). What's not: Custom domains, multiple sites, team seats, CMS.

Try Framer Free

The bottom line on free prototyping

Start with Figma unless you have a reason not to. It has the best feature set at no cost and the largest community for learning. Penpot is the right call if you have a philosophical objection to cloud-locked tools or need unlimited projects for free. Use Marvel when you need a shareable click-through in minutes. Uizard when design skills aren't in the room. Framer when the prototype needs to feel like a real website.

None of these require a credit card to get started. Pick one, start building.