Privacy policy
Last updated: 11 November 2026 · Version 1.0.0 · Publisher: isabilov.
Short version: GapRuler itself sends no data anywhere and has no servers. What it reads and saves stays in your browser. The only time anything goes out is when you click one of the two links in its About card, which open a website in a new tab.
What GapRuler reads on a page
Only on the tab where you turn it on, and only while it is on:
- Sizes, positions and computed styles of elements (box, padding, margin, gap, font, colours, radius, tag and class names) — to draw measurements and the selection card.
- Where text sits on the page (the position of text lines, read from the page's text nodes) — only so labels and the selection card don't cover the text. The text is not stored, copied or sent.
- The page address (site + path) — only as the local storage key for that page's measurements.
- The visible part of the page as an image — only when you press Export PNG; it goes straight into the PNG file in your Downloads folder.
What GapRuler saves (on your device only, chrome.storage.local)
| Data | Why |
|---|---|
| Measurements, lines and guides you pin, per page address (site + path) | So they are still there when you come back to the page. |
| Toolbar position, per site | So the toolbar opens where you left it. |
| "First-run card seen" flag | So the welcome card shows only once. |
Copy CSS and the colour picker write to your clipboard because you asked them to.
GapRuler has no servers, no analytics, no tracking, no ads, no account and no remote code.
Links in the About card
- Report a bug opens a Google Form in a new tab. The link contains only the extension name ("GapRuler") and its version (for example "1.0.0") so the form is filled in for you; opening it sends those two values to Google as part of the address. It never contains the page you were on or anything from it. Whatever you type into the form is sent to Google only when you press Submit. Google Forms is run by Google under Google's privacy policy; the answers are read only by the publisher to fix bugs.
- by isabilov. opens isabilov.com.
Like any link, opening these pages lets those websites see the usual browser information (for example your IP address).
When GapRuler runs
Only on the tab where you turn it on (toolbar icon or Alt+Shift+M). It cannot run on Chrome's own pages, the Chrome Web Store or the PDF viewer.
Permissions
- activeTab — temporary access to the current tab, only after you click the icon or press the shortcut.
- scripting — place the measuring overlay on that tab.
- storage — keep your measurements, toolbar position and the first-run flag on your device.
Deleting your data
Clear a page's measurements with Clear all (Shift+Backspace), or remove the extension: Chrome deletes everything GapRuler stored.