Pencil Project
Pencil Project: A free desktop tool for wireframes, mockups, flowcharts, and basic diagrams. Ranked #32 of 36 in Diagram Software by our editors (6.0/10); pricing: Free plan; best for free wireframing and basic diagram creation.
At a glance
- Editor score6.0 / 10
- PricingFree plan
- Best forFree wireframing and basic diagram creation
- Free planYes
- Paid fromFree
- Facts checked20 Sep 2026
Where it wins
- Free and open source across Windows, macOS, and GNU/Linux
- Built-in shape collections cover UI mockups, flowcharts, and mobile interfaces
- Exports to PNG, HTML, SVG, PDF, and OpenDocument text
Where it doesn't
- Desktop-focused rather than a browser-based diagram workspace
- More focused on mockups and basic diagrams than broad diagramming
- No collaboration or version-history features are listed
Our verdict on Pencil Project
Pencil Project is a free, open-source desktop application for GUI mockups, wireframes, flowcharts, and other diagrams. It is intended for people who need to sketch interfaces or create straightforward visual documentation on Windows, macOS, or GNU/Linux. Built-in collections cover general-purpose shapes, desktop and web interfaces, Android, and iOS, while connectors, freehand drawing, and object snapping support basic diagram construction. Inter-page linking also allows users to create interactive HTML prototypes.
Its strongest advantage is the combination of a free open-source model and broad export coverage. Documents can be exported as PNG, HTML/web, OpenDocument text, SVG, or PDF, and SVG can be imported. Custom stencil collections extend the built-in shape library, while clipart browser integration with OpenClipart.org adds another source of visual elements. These capabilities make Pencil Project a practical fit for interface planning, flowcharts, and diagrams that need to move into documents, vector files, PDFs, or web prototypes.
The trade-off is focus. Pencil Project is centered on desktop-based mockups and basic diagrams rather than a broader collaborative diagramming workspace. Its published feature set emphasizes drawing, shape libraries, connectors, prototyping, and file export, so teams seeking shared editing or version history should consider a different type of tool. Choose Pencil Project when free, cross-platform wireframing and local diagram creation are the priority; choose an alternative when real-time collaboration or more extensive team workflow features matter more.
Your product? Our editors can test Pencil Project in depth and publish a review, labelled as paid · from $149/mo →
Pencil Project pricing
Pencil Project fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Diagram types | GUI mockups, wireframes, flowcharts, desktop UI, web UI, Android UI, iOS UI |
| Real-time collaboration | Not verified |
| Export formats | PNG, HTML/web page, OpenOffice/LibreOffice text, SVG, PDF |
| Import formats | Not verified |
| Desktop app | Yes |
| Version history | Not verified |
| Maximum editors | Not verified |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Community |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 1 integrations: OpenClipart.org |
| Pricing | Free plan |
| Website | pencil.evolus.vn |
| Facts checked | 20 Sep 2026 |
Pencil Project integrations
Pencil Project lists 1 integrations on its own site.
- OpenClipart.org
Alternatives to Pencil Project
- draw.ioA broad, flexible diagramming editor for teams that want free cross-platform coverage.9.4
- Visual ParadigmA broad modeling suite with collaboration, engineering tools, and a free plan.9.2
- LucidchartA broad, collaborative diagramming workspace with a free tier and web-only access.9.0
See all Pencil Project alternatives →
Also Ranked In
Pencil Project is ranked in 11 of our directories; the 6 strongest besides Diagram Software.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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