Pencil Project

Free open-source GUI prototyping tool for desktop and web

About Pencil Project

Pencil is a free and open-source GUI prototyping tool built on the Electron/Firefox platform for sketching application and website interfaces, with built-in stencil collections for desktop, web, Android and iOS shapes, diagramming connectors and export to PNG, PDF, SVG and HTML. It runs on Windows, macOS and Linux under the GPL.

Pencil Project website preview

Live preview of pencil.evolus.vn via the WordPress mShots service — it can take a few seconds to generate on a first visit.

Pencil Project: strengths & things to check

Strengths

Completely free to use — this directory lists no paid plan for it.
Covers prototyping, wireframing, ui design, open source — see the focus areas listed in its key facts.
Has 6 close alternatives in the same category on this page, so switching or comparing is easy.

Things to check

Free tools can change their model or shut down — avoid locking critical work into it without an export path.
Current plan prices are not listed here (they change too often to print reliably) — confirm the exact price on the official site.
It is one of 626 tools in the Design & Creative category here — compare it against the alternatives below before you commit.

Derived from this listing's own data (pricing model, focus areas and category) — not a hands-on review score.

Pencil Project pricing

Pricing model	Free — listed in this directory as a free tool, with no paid plan required to use it.
Free access	Yes — fully free
Current plan prices	Listed on the official site — prices change, so this directory links out instead of printing a number that may already be stale.
Official site	pencil.evolus.vn

Pencil Project key facts

Category: Design & Creative
Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
Focus areas: prototyping, wireframing, ui design, open source
Official site: pencil.evolus.vn

Pencil Project FAQ

How much does Pencil Project cost?

Free — listed in this directory as a free tool, with no paid plan required to use it. Current plans and prices are listed on the official site (pencil.evolus.vn).

What is Pencil Project used for?

Free open-source GUI prototyping tool for desktop and web Its focus areas in the Design & Creative category: prototyping, wireframing, ui design, open source.

Where can I try Pencil Project?

On its official site, pencil.evolus.vn — the Visit Official Site button above goes straight there.

Pencil Project vs alternatives

	Pencil Project	Penpot	Uizard	Marvel
Pricing	Free — listed in this directory as a free tool, with no paid plan required to use it.	Free — listed in this directory as a free tool, with no paid plan required to use it.	Freemium — a free tier lets you start, and paid plans are available if you need more.	Freemium — a free tier lets you start, and paid plans are available if you need more.
Focus areas	prototyping, wireframing, ui design, open source	ui design, prototyping, open source	ui design, prototyping, ai design, wireframing	prototyping, wireframing, design, user testing
Official site	pencil.evolus.vn	penpot.app	uizard.io	marvelapp.com
Directory status	Listed	Listed	Listed	Listed

Side-by-side from each listing's own directory data. Full alternative cards are below.

About the Design & Creative category

Design tools for interfaces, graphics, websites, and creative work. The Design & Creative category on Tools Hub currently lists 626 tools. Alongside Pencil Project, it includes Vectorpea, Vectopea, PhotoQuill, Koi Photo.

FreeDesign & Creativeprototypingwireframingui-designopen-source

Alternatives to Pencil Project

Tools in the same Design & Creative category that share focus areas with Pencil Project — worth comparing before you commit:

Design & Creative

Penpot

Open-source design tool

Freeui-designprototypingopen-source

Design & Creative

Uizard

AI UI design and prototyping from text prompts and screenshots

Freemiumui-designprototypingai-designwireframing

Design & Creative

Marvel

Design and prototyping platform for wireframes, prototypes and testing

Freemiumprototypingwireframingdesignuser-testing

Design & Creative

MockFlow

Wireframing and UI planning suite for web and app projects

Freemiumwireframingui-designsitemapscollaboration

Design & Creative

Mockplus

Design, prototype, and handoff in one platform

Freemiumprototypingwireframinghandoffdesign

Design & Creative

Pixso

Online collaborative design tool for UI and prototypes

Freemiumui-designcollaborationprototypingonline

More in Design & Creative

Comparing tools in the Design & Creative category? These related listings are worth a look: Vectorpea — Free online vector graphics editor for SVG, AI and PDF files; Vectopea — Free online image vectorizer and editor with no sign-up; PhotoQuill — Online photo editor that is free at the core, with credit-based AI generation.