Diagram Designer
Diagram Designer: A capable free Windows diagram tool for core diagrams, images and utilities. Ranked #36 of 36 in Diagram Software by our editors (6.0/10); pricing: Free plan; best for basic free Windows diagramming.
At a glance
- Editor score6.0 / 10
- PricingFree plan
- Best forBasic free Windows diagramming
- Free planYes
- Paid fromFree
- Founded2003
- Facts checked20 Sep 2026
Where it wins
- Freeware plan provides the full version without limitations
- Supports flowcharts, UML class diagrams, illustrations and slide shows
- Imports and exports nine listed image formats
Where it doesn't
- Windows desktop focus limits platform coverage
- No documented real-time collaboration features
- Its diagram types and ecosystem are narrower than broader suites
Our verdict on Diagram Designer
Diagram Designer is a free, open-source Windows desktop application for creating flowcharts, UML class diagrams, illustrations and slide shows. It is aimed at individuals and teams that need basic diagramming on Windows, along with image handling and a few utility features. The customizable template object palette supports reusable diagram elements, while spellchecking, downloadable dictionaries and text formatting help with document preparation.
Pricing is straightforward: the Freeware plan costs $0 and provides the full version without limitations. The feature set extends beyond core diagram creation with image import and export in WMF, EMF, BMP, JPEG, PNG, MNG, ICO, GIF and PCX formats. It also includes a mathematical graph plotter, an equation-solving calculator, a slide show viewer and a compressed drawing file format. These additions make the application useful for diagrams that combine structured visuals, illustrations and supporting calculations without introducing a paid tier.
The strongest fit is a Windows user who values a free desktop tool with broad image-format support and an open-source codebase under the MIT license. Integration is focused: Diagram Designer can connect with MeeSoft Image Analyzer for bitmap editing and extended file-format support. Its platform coverage is limited to Windows, and its collaboration support is limited compared with tools built around shared editing. Choose it for self-contained desktop diagramming and basic utilities; choose another category tool when real-time collaboration or wider platform coverage is central.
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Diagram Designer pricing
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Diagram Designer fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Diagram types | flowcharts, UML class diagrams, illustrations, slide shows |
| Real-time collaboration | Not verified |
| Export formats | WMF, EMF, BMP, JPEG, PNG, MNG, ICO, GIF, PCX |
| Import formats | WMF, EMF, BMP, JPEG, PNG, MNG, ICO, GIF, PCX |
| Desktop app | Yes |
| Version history | Yes |
| Maximum editors | Not verified |
| Deployment | Desktop |
| Platforms | Windows |
| Support | Email, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 1 integrations: MeeSoft Image Analyzer |
| Pricing | Free plan (source) |
| Website | meesoft.com |
| Facts checked | 20 Sep 2026 |
Diagram Designer integrations
Diagram Designer lists 1 integrations on its own site.
- MeeSoft Image Analyzer
Alternatives to Diagram Designer
- 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 Diagram Designer alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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