See what is tracking you inside an email
Most commercial mail reports back the moment you open it: when, roughly where, on what device. The mechanism is a one-pixel image. This shows you exactly which ones are in a given message.
- Runs entirely in your browser
- Works offline
- No upload
- No sign-up
- No watermark
Loading the tool…
How it works
- Paste the message source, or just its HTML.
- Press Find the trackers.
- Turn off automatic image loading in your mail client — that single setting stops nearly all of it.
Why nothing is uploaded
Every operation on this page is done by code running inside your browser tab, using the same engine that renders web pages. The file is read from disk into your tab’s memory, transformed there, and written back out as a download. It is never sent anywhere — not to us, not to a third party.
Verify it yourself
- Open your browser’s developer tools (F12) and select the Network tab.
- Load your file and run the tool.
- The only requests you will see fetch the tool’s own code — and, for a few heavy tools, their open-source engine from a public CDN — plus one small page-view ping to loreatec.jp (page address and title, nothing more). None of them carry your file.
Frequently asked questions
How does a one-pixel image track me?
It is hosted on the sender’s server with a unique address for you. When your mail client fetches it, that request tells the sender the message was opened, at what time, from what IP address — which gives an approximate location — and what client and device made the request. Blocking remote images prevents the fetch, and with it all of that.
Are ordinary images tracking too?
Any remote image reports back when it loads. Senders that want per-recipient tracking use unique addresses, and then every image in the message is a beacon. The invisible pixel exists only for messages that have no other images.
What is a click-tracking link?
A link that goes to the sending platform first, which records that you clicked and then redirects you to the real destination. Common and usually disclosed, but it means the platform has a log of what interested you, and it also means the address shown is not where you are going.
Is any of this illegal?
Generally no, though in the EU and under Japan’s APPI it belongs in the privacy notice, and consent rules can apply. The practical answer is not legal: block remote images in your client and the tracking stops without you having to argue with anyone.
Does opening a message here trigger the trackers?
No. The HTML is analysed with the browser’s parser, which does not fetch anything, and it is never rendered as a live page. That is the whole point of doing it here rather than in a mail client.