MailweightMailweight privacy policy
Effective September 15, 2026
Mailweight works entirely inside your own browser, on your own Gmail tab. It reads a little of what Gmail is showing you so it can do its job, and keeps a few numbers on your computer. It never sends, sells, or shares any of it: nothing Mailweight sees leaves your device.
What Mailweight is
Mailweight is a Chrome extension that finds old and oversized email in Gmail. It runs Gmail searches for you (for example, messages over 10 MB and older than a year), shows how many messages each search matched, and can select them in Gmail so you can review and delete them yourself. Mailweight never deletes anything on its own.
What it reads
Mailweight only runs on mail.google.com, and only reads what
Gmail is already showing you in that tab:
- The result count Gmail shows for a search, such as "1–50 of 1,234". To find that number, Mailweight looks through the text on the Gmail page. Nothing from that text is kept except the count itself.
- Gmail's own checkboxes and "select all" link, so it can tick the messages a search matched when you ask it to.
It doesn't open your messages, and it doesn't read their contents, attachments, or contacts for any purpose. It doesn't use a Google account token or any Google API.
What it stores
Mailweight saves a few things with Chrome's extension storage
(chrome.storage.local), which stays on your computer:
- The message count for each search group, and when it was taken, so the panel can show them the next time you open it.
- Where you last put the panel on screen and how big you made it.
- A short-lived note that you clicked the toolbar icon, so the panel opens once Gmail finishes loading. It's cleared as soon as it's used.
Removing the extension deletes all of this.
What it sends
Nothing. Mailweight has no server, no analytics, no ads, and no tracking, and it makes no network requests of its own. All of its code ships inside the extension; it doesn't load any code from the internet. This website doesn't track you either: no cookies, no analytics, and no third-party fonts or scripts.
Permissions
- Storage: to keep the counts and panel position described above on your computer.
- Access to mail.google.com: to show the Mailweight panel inside Gmail and run searches there.
Limited Use
The use of information received from Google APIs will adhere to the Chrome Web Store User Data Policy, including the Limited Use requirements.
Changes to this policy
If this policy changes, the new version will be posted on this page with a new effective date. If Mailweight ever starts collecting data, this policy and the extension's Chrome Web Store listing will say so before that version is released.
Contact
Questions or concerns: open an issue on GitHub.