Your work stays on your computer.
NASSCAD has no accounts and requires no identifying details. The files you open and the models you build are processed inside your browser, and never uploaded anywhere. This page describes what can leave your machine when you visit the website or choose to send feedback.
No sign-up, no login, no name or email address asked — for students or anyone else.
CAD files are read and written locally. Model file names, contents and geometry are never sent by the application.
No ads, no ad networks, no data sold or shared for marketing.
Your files and the MEDUSA engine
Everything you import, model and export is handled by code running in your browser tab. Saving writes a file to your own disk.
Boolean operations run inside your browser tab. The optional MEDUSA engine (faster booleans on large models, exact STEP export) is a program that runs on your own computer. NASSCAD talks to it at 127.0.0.1, the address of your own machine: the data never reaches the network.
Analytics on nasscad.com
To understand which features are used and what to improve, most pages served from www.nasscad.com use Google Analytics 4. The feedback page is excluded. Analytics measures:
| What is measured | Details |
|---|---|
| Page visits | Page address and title, the site you came from, time spent, scrolling, clicks on external links, video interactions, downloads of files published on nasscad.com. |
| Device | Browser, operating system, screen size, language. |
| Approximate location | Country, region and city, estimated by Google from your IP address. Google Analytics 4 does not store IP addresses. |
| App usage | The application started; a first object was created; an import started and finished (file format, number of files, size range such as “1–10 MB”, duration, number of failures); an export was requested (format, number of objects, whole design or selection only); whether the MEDUSA engine is running. |
Never sent: names, email addresses, file names, file contents, geometry, scripts, or anything typed into the application.
Analytics stores two first-party cookies (_ga and _ga_3181YHN32V, up to two years) that recognise a returning browser without identifying the person. Google signals and ad personalisation are disabled, and no user ID is ever sent. Event data is kept for 14 months.
When analytics is off
No analytics script is loaded, and no cookie is set, in any of these cases:
- Visits from a school portal: ClassLink, Clever, Google Classroom, Schoology and Canvas. The choice is remembered on that device.
- Links ending in
?edu=1, for examplehttps://www.nasscad.com/NASSCAD_V4_7_0.htm?edu=1. Districts can use this address in their portals and bookmarks. - Browsers sending Global Privacy Control or Do Not Track.
- The offline package and any copy of NASSCAD opened from a disk, a network share or another server.
- After you switch it off with the button below.
Schools and districts
NASSCAD collects no personal information from students. For classroom use, either:
- add
https://www.nasscad.com/NASSCAD_V4_7_0.htm?edu=1to your portal (analytics off from the first page), or - install the free offline package on your computers or a network share: it makes no connection to nasscad.com at all.
Schools use NASSCAD free of charge under the education license. Questions about data handling or privacy agreements: contact@nasscad.com.
Other requests your browser makes
The home page and the NassScript documentation load their fonts from Google Fonts, which receives your IP address as part of the request. The application page loads no third-party fonts. Like any website, the hosting provider keeps standard server logs (IP address, date, requested page, browser) for security and operation.
Feedback without an email address
The feedback form asks for a type of feedback and your message. You may choose to attach one JPG image (up to 2 MB). When you press Send, the text and only the image you selected are sent to the NASSCAD website and forwarded to contact@nasscad.com. Standard JPEG metadata, including EXIF location and camera details, is removed before the image is emailed, and the original filename is not forwarded. The image content itself may still identify you or reveal private work, so check it before sending. No name, email address, account, model, project or diagnostic log is requested or attached automatically. Without your contact details, NassLab cannot reply.
The feedback page loads no analytics, third-party scripts, fonts or cookies. The feedback email does not include your IP address, browser or referring page. Your browser still connects to the web host, whose standard security and operation logs may record technical request details as described above. The mail provider also processes the message and optional image to deliver it.
Contact
NassLab — Nasser, France · contact@nasscad.com