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.
Demo password: stool-2026 โ it is public on purpose. Type it on the lock screen above; the cover and title are visible without it.
Build your own: add an image โ mark the details with hotspots โ 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.
Paid and members-only catalogs
Sell a guide or a course, or share some catalogs with everyone and keep others for the people you give the password to. One password per file โ no accounts, no server; anyone who has the password can open it. You create the protected copy in the Editor. Open the demo (password: stool-2026) โ
Teaching and learning
Explorable diagrams for lessons and class projects โ no student accounts, no cloud. See the schools page โ
Gyms and fitness
Pick a muscle group, find the machine, see how to set it up and print a workout โ no app, no account. Open the demo โ
Tests and self-check
Answer options sit on the picture โ tap one and it turns green or red, with a running score. Try the demo โ
The apps
Editor โ
Build a catalog: place hotspots on an image, attach data to each.
Collaboration Server
Optional, self-hosted: edit a catalog live with someone else.
Catalog Server
Optional, self-hosted: share a folder of catalogs from your own computer, on your network or the internet.
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 โ 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.