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ONECLICKTOOLINDEPENDENT STUDIO

Draw on Screen for Teachers — Privacy Policy

Extension: Draw on Screen for Teachers – Annotate Web  · Last updated: October 23, 2026

This extension lets you draw, highlight and annotate on top of the web page you are looking at — usually while you are sharing your screen to teach — and save that marked page as an image. It has no servers of its own, no account with us, and no analytics, tracking or advertising code. It makes no network requests of any kind — not one. Everything it keeps is sitting in your own browser.

1. What We Store

Everything the extension keeps is in your own browser, on the machine in front of you. None of it is sent to us or to anybody else.

DataWhere it is storedWhyLeaves your device?
Your drawings on a page — the strokes themselves, plus the address and title of the page you drew onchrome.storage.localBring your marks back on that same page, instead of losing them the moment you scroll or come back to the lessonNo
Your tool settings — colour, stroke width, opacity, recent colours, and whether marks stay visible when draw mode is offchrome.storage.localOpen the toolbar with the pen you were last usingNo
How many times you have saved a marked page as an image, and whether you answered the rating promptchrome.storage.localAsk for a rating once, after the third save, and stop asking when you answerNo
The date you installed the extensionchrome.storage.localTell a first run from a later one, so the welcome page opens only onceNo
The image of a marked page, when you ask for oneYour own Downloads folder, as a .png fileSend the marked-up page to a student, or keep it with the lessonNo — it is written straight to your disk

Note the first row honestly: to put your marks back where you left them, the extension has to remember which page they belong to, so the address and title of that page are saved next to the strokes. This happens only for pages you actually drew on. It is not a browsing history: pages you merely visit are never recorded.

2. What the Extension Reads on a Page

While you draw. It places a transparent canvas over the page and follows your mouse or pen. It does not read the page text, your form fields, your passwords, your cookies, or anything you type. The strokes it saves are your own lines and shapes — coordinates, colour and width — not the content underneath them.

When you save an image. Chrome hands the extension a picture of the visible part of the tab, exactly as it appears on your screen, and that picture goes straight into your Downloads folder. If the page shown happens to contain something private, that private thing is in your own file, on your own disk. No copy is kept and nothing is uploaded.

3. Third-Party Services

None. This version contacts no server, ours or anyone else's. There is no analytics service, no error reporting, no font, icon or script loaded from a CDN, and no advertising network. Earlier versions fetched site icons from Google to decorate the list of saved pages, which quietly sent the address of each page you had annotated to Google; that was removed in version 1.2.0 and the icons are now drawn locally.

Two links in the extension open a normal browser tab when you click them: the Chrome Web Store page, if you answer the rating prompt, and a donation link. Clicking a link is an ordinary visit to that site, under that site's own privacy policy. Nothing about you is attached to it by the extension.

4. Permissions

The extension asks for no access to any website when you install it. The list below is the whole of what it holds.

  • activeTab — the drawing canvas is placed on one page at a time, and only after you ask for it by clicking the toolbar icon, pressing Ctrl+Shift+D, or using the right-click menu. That action gives the extension access to that one tab, and nothing else.
  • scripting — how the canvas and its toolbar get onto the page once you have asked for them.
  • storage — saves the things listed in section 1.
  • sidePanel — the tool palette lives in Chrome's side panel, so it does not cover the page you are teaching from.
  • contextMenus — adds "Start drawing here" to the right-click menu, for people who do not use keyboard shortcuts.
  • downloads — writes the .png file when you press Ctrl+S or click Save. It is never called on its own.
  • Access to all sites — optional, and off by default. If you turn on "keep marks after reload" in the side panel, Chrome asks whether to let the extension run on the sites you visit. Granting it buys exactly one thing: your marks reappearing by themselves when a page is reloaded, which needs the canvas to run as the page loads rather than waiting for you to press a key. If you decline, every drawing feature still works; the marks simply come back when you switch draw mode on again. You can withdraw it at any time from the same panel, and the extension stops running on pages by itself the moment you do.

5. Data Retention and Deletion

All data lives in your browser. Uninstalling the extension removes it. You can also clear the marks on a page with the Clear button, or delete a saved page from the library list in the side panel. We hold no copy, so there is nothing for us to delete and nothing for us to hand over.

6. Children's Privacy

The extension is built for teachers rather than for children, is not directed at children under 13, and does not knowingly collect data from them. It collects no personal data from anyone. A teacher using it in a lesson sends nothing about their students anywhere, because the extension sends nothing anywhere.

7. Changes to This Policy

If a future version changes what the extension stores, or adds any network request at all, this page will be updated with a new date before that version ships, and the change will be called out in the release notes.

8. Contact