Electronic Catalog Maker See how it works
Select a marker or use the arrows to explore item details. Use Fit to see the whole image.
Open full demo Edit this example
Buy opens our demo store checkout, where every item costs $0.
Build your own: add an image → mark the details with hotspots → save the catalog file and open it in Viewer.
Who it's for
Parts and equipment
Connect items in a diagram with part numbers and descriptions.
Furniture and products
Add details to objects or components in a photograph.
Teaching and learning
Explorable diagrams for lessons and class projects — no student accounts, no cloud. See the schools page →
The apps
Editor →
Build a catalog: place hotspots on an image, attach data to each.
Collaboration Server
Optional, self-hosted: edit a catalog live with someone else.
Built around your catalog files
- Free, no subscription The apps are free and open source (MIT). No accounts, no plans.
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Your catalog is one file
Images, hotspots and data live together in a single
.ecatmfile on your device. It goes nowhere unless you share it. - Photos and diagrams Put hotspots on any image — a furniture photograph, a parts diagram, an anatomy chart.
- Links to your own store Point items at any online store you already use. There's no marketplace or checkout of ours in between.
- Works offline after you first open it After you first open the apps on a computer, tablet or phone, they are cached in your browser and keep working without a connection.
- Live editing, only if you want it Editing together needs the optional, self-hosted Collaboration Server. Everything else works without it.