# Lineform Privacy Policy

> What Lineform collects, what it never collects, and where data goes.

Source: https://www.extensionshop.store/extension/lineform/privacy
Markdown: https://www.extensionshop.store/extension/lineform/privacy.md

This is the privacy policy for **Lineform** — Open DXF, DWG and 3D models in Chrome, offline. The extension page is at https://www.extensionshop.store/extension/lineform.

## Data collected

| Data | Optional | Purpose |
| --- | --- | --- |
| Free-version status (stored locally) | No | A fingerprint (SHA-256 hash) of the first file you opened, so that same file keeps opening, and whether Lineform is unlocked, with the code you typed. Never the file itself or its name. Kept in Chrome's extension storage on your device and never sent anywhere. |
| Recent files (stored locally) | Yes | The files you opened, with their side files (such as an OBJ's .mtl and textures), name, format, size, open time and a small preview picture, so they reopen later. Kept in IndexedDB in your browser, capped at 500 MB by default, and you can remove them, clear all or turn this off. |
| Settings (stored locally) | No | Recent files on or off, background, default 3D units and the recent-files size cap, plus your theme choice. Kept in your browser and never sent anywhere. |
| Usage counts (stored locally) | No | How many files you opened, on which days, how many opened cleanly or failed, and your answers to the optional support and rating cards. Numbers and dates only, never file names or contents. They stay on your device. |

## Never collected

- The drawings and models you open — they are read and drawn inside your browser, with no upload and no conversion server
- The content of the pages you visit — Lineform reads a page only after you click its button, shortcut or menu item there, and then only the item you pick
- Browsing history — Lineform keeps no list of pages
- Your Google account, Google Drive, name, email or any personal identifiers — there is no account
- Analytics, telemetry, crash reports, tracking or ads of any kind
- Data sent to any server — the only network requests are downloading a file from a link you choose to open, after you allow that site, and reading the one model or drawing you pick on the page you are on

## Third-party sharing

None. Lineform has no server and uses no analytics, SDKs or ads. Three links open a normal browser tab only when you act: "Rate it" opens Lineform's Chrome Web Store page, "Support" opens the developer's Ko-fi page, and uninstalling opens a short optional feedback form on Tally (tally.so) that receives nothing unless you fill it in and submit it. Lineform sends nothing to any of them, and nothing is added to the form's address; anything you choose to type in the form goes to Tally and to the developer.

## Encryption

No data is transmitted.

## Data retention

Recent files stay in your browser's IndexedDB until you remove them, clear all, turn off "Keep recent files", the size cap pushes them out (oldest first), or you uninstall. Settings and usage counts stay until you change them or uninstall, which deletes them automatically. PNGs you save are ordinary files in your Downloads folder.

## Permissions

| Permission | Why it is needed |
| --- | --- |
| Storage | Small counters and answers for the optional support and rating cards. Recent files and viewer settings are kept in IndexedDB on your computer. |
| Unlimited storage (unlimitedStorage) | Keeps recent files whole so they reopen without the original, and stops Chrome clearing them when disk space runs low. You set a cap (500 MB by default) and can turn recent files off. |
| Context menu (contextMenus) | Adds "Open in Lineform" to links that look like CAD or 3D files, and "Open the 3D or 2D on this page". |
| Open local files (declarativeNetRequestWithHostAccess, file:///*) | Sends a CAD file to the viewer instead of Chrome downloading it or showing raw text. It matches only local files, when you turn on "Allow access to file URLs" for Lineform, and CAD file links on sites you allowed. Lineform never reads any other local file. |
| Current tab, when you ask (activeTab, scripting) | After you click the toolbar button, press Alt+Shift+D or use the right-click item, Lineform gets temporary access to that one tab to list the 3D models and drawings on it, and reads only the one you pick. Never other tabs, never in the background. |
| Site access, optional (http and https) | Never asked at install. When you choose "Open in Lineform" on a link, Chrome asks for that one site, and Lineform downloads only that file. You can remove the site any time in chrome://extensions. |

Support: iliasselbarhoumi@gmail.com