Privacy Policy

Last updated: 17 August 2026

When you scan a URL

The scanner loads the page you give it in a headless browser on our server, measures the images, and saves the result so the report has a link you can return to or share. What we store is:

• the URL you submitted, and the time you submitted it;
• for each image found: its address, alt text, file dimensions, displayed dimensions, whether it was an <img> or a CSS background, and whether it was visible.

We do not store your IP address alongside a scan, and scans are not tied to any identifier for you. There is no way for us to look up “everything this person scanned”, because we never record who scanned what.

Scan results are reachable by their own link. Each report has a unique URL, and anyone who has that URL can view the report. We do not publish an index of scans or list them anywhere, but you should treat a scan as shareable rather than private. Please do not scan pages that contain confidential information — a staging site behind a login is a good candidate for the browser extension instead, which measures locally and sends nothing to us.

Scan records are kept indefinitely, because the aggregate data is what our published research is drawn from. That research reports totals and percentages only — never individual URLs. If you scanned something you would rather we did not hold, email us the report link and we will delete it.

When you use the converters and other tools

The format converters, the resizer, the cropper and the GIF converter all run entirely inside your browser using WebAssembly. Your file is never uploaded, never reaches our server, and is not stored anywhere by us. Closing the tab is all the cleanup there is. This is a technical fact about how the tools are built rather than a promise about how we behave — the work happens on your machine because there is no endpoint to send it to.

Analytics

We use Google Analytics 4 to see which pages and tools get used, which tells us what to build next. It sets cookies and collects the usual page-view data, including a truncated IP address, your approximate location, and which browser and device you are on. We also record which tools are opened and whether a scan or conversion finished, so we can tell a broken feature from an unpopular one.

To be straightforward about it: analytics loads for everyone, and this site does not show a cookie consent banner. If you would rather not be counted, any of these work — Google’s official opt-out add-on, your browser’s tracking protection, or any content blocker. Nothing on the site breaks if analytics is blocked; we build it that way deliberately.

Our server also applies a rate limit so one visitor cannot monopolise the scanner. That counter lives in memory, keyed by IP, and is discarded within minutes. It is never written to disk and never associated with a scan.

If you join a waitlist

Some pages have offered a waitlist for features that were being considered. If you submitted one, we hold the email address you typed and what you said you were interested in — nothing else, and only because you chose to send it. It is never sold or passed on, and it is not used for marketing. Email us and we will delete it.

Affiliate links

Some pages recommend third-party image-optimization services through affiliate links, and we record in analytics that a link was clicked — not who clicked it. Following one takes you to that company’s site, where their privacy policy applies, not ours. See the affiliate disclosure for which services these are and how the relationship works.

Who else is involved

The site runs on our own server and sits behind Cloudflare, which handles traffic and filters attacks; Cloudflare processes requests on our behalf and keeps its own transient logs. Google Analytics is described above. That is the complete list — there are no advertising networks, no data brokers, no session-recording tools and no third-party trackers beyond the two named here.

The browser extension

The ImageDimensions browser extension does not collect, transmit, store or share any data whatsoever.

When you click its toolbar icon, it measures the images on the page you are looking at and shows the results in its popup. Those measurements exist only while the popup is open. Clicking a result scrolls that image into view and draws a temporary highlight, which it then removes.

It makes no network requests of any kind. There is no analytics, no telemetry, no error reporting, no cookies, no local or synced storage, and no account. It cannot read your browsing history or your bookmarks, and it has no access to any page you have not explicitly opened it on.

It requests exactly two permissions and no host permissions at all:

• activeTab — lets it read the current tab, and only after you click its icon.
• scripting — lets it run its measurement on that tab, on that click.

Because it has no host permissions, it has no standing access to any website; each use is a deliberate act by you. The extension is open source, so none of the above has to be taken on trust — read the code.

Children

This is a developer tool and is not directed at children. We do not knowingly collect information from anyone under 13.

Changes

If this policy changes, the date at the top changes with it. Changes that affect what we store, rather than how it is worded, will be described here rather than slipped in.

Contact

Questions about any of this, or a deletion request, go to hello@imagedimensions.com. See also the contact page.