Joyce's Geometry Applet
Joyce's Geometry Applet: A focused, embeddable geometry-diagram library for web developers. Ranked #20 of 34 in Geometry Learning Software by our editors (5.6/10); pricing: Free plan; best for developers embedding interactive geometry diagrams.
At a glance
- Editor score5.6 / 10
- PricingFree plan
- Best forDevelopers embedding interactive geometry diagrams
- Free planYes
- Paid fromNone
- Dynamic constructionsYes
- Founded1996
- Facts checked28 Sep 2026
Where it wins
- Dynamic diagrams update as users drag free or constrained points
- Broad constructions span points, lines, circles, polyhedra and more
- Embeds through a CDN bundle or npm package under the MIT License
Where it doesn't
- No proof or problem-practice features
- No classroom tools or structured teaching workflow
- Web-only implementation with no offline mode
Our verdict on Joyce's Geometry Applet
Joyce's Geometry Applet is an open-source browser tool for exploring Euclidean constructions through interactive HTML5 canvas diagrams. It suits solo developers and small teams that need geometry visualizations inside web pages rather than a complete learning-management or practice environment. The current implementation is geomlib, a TypeScript port of the original Java applet, and it supports dynamic relationships between diagram elements as users interact with them.
Its strongest fit is as an embeddable construction library. Developers can load a CDN bundle or install an npm package, then present diagrams with draggable free points, constrained sliding points, pivot-based rotation and scaling, and animated slide transitions. Construction coverage includes points, lines, circles, polygons, planes, spheres and polyhedra. Keyboard reset and canvas maximize controls add practical interaction options for embedded figures. The browser platform keeps deployment focused, while the MIT License supports open-source integration.
The product stays deliberately narrow. It provides construction diagrams, not proof practice, problem practice or classroom tools, so instructors seeking assignments, assessment flows or course management should choose a broader geometry-learning system. There is also no offline mode, making browser delivery the operating model. Choose Joyce's Geometry Applet when your priority is rendering and embedding responsive Euclidean figures with a small web stack; look elsewhere when learners need guided exercises, proof authoring or classroom administration.
Joyce's Geometry Applet pricing
Joyce's Geometry Applet fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Dynamic constructions | Yes |
| Proof practice | No |
| Problem practice | No |
| Classroom tools | No |
| Supported platforms | Web |
| Offline mode | No |
| Deployment | Cloud, Browser extension |
| Platforms | Web |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | euclids-elements.org |
| Facts checked | 28 Sep 2026 |
Alternatives to Joyce's Geometry Applet
- GeoGebraA broad geometry and mathematics suite with adaptive practice, classroom tools, and offline apps.9.0
- GNU Dr. GeoA free, programmable desktop geometry environment for dynamic constructions and exploration.8.2
- KigA free desktop tool for exploring constructions, with macros and drawing features.7.7
See all Joyce's Geometry Applet alternatives →
Used Joyce's Geometry Applet? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Joyce's Geometry Applet for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
Joyce's Geometry Applet is listed in our Geometry Learning Software directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/joyce-s-geometry-applet/"><img src="https://www.itechguides.com/best/badge/joyce-s-geometry-applet.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. It never changes a score or a verdict. How we rank.
Last updated · How we research and update