Last updated: July 2026 (v1.0.1)
Undelve is private by architecture, not just by policy.
Nothing. Undelve runs without servers or accounts, and it keeps no analytics.
Undelve checks your writing entirely inside your browser, on your device. The rules it checks against are packaged with the extension. Your text is never transmitted anywhere — there is no server to send it to.
Undelve makes zero network requests. The extension contains no networking code at all, requests no access to any website's data beyond showing its underlines on the page you're typing on, and its only browser permission is local settings storage. The source links on its explanation cards open in a new tab only when you click them, like any ordinary link.
Your preferences (severity level, rules you've turned off, words you've allowed, sites you've disabled) are stored in Chrome's extension storage. If you have Chrome sync turned on, Chrome itself may sync those settings between your own browsers through your Google account — that is Chrome's feature under your control; Undelve transmits nothing on its own. Your settings never include your text.
No data is shared with, or sold to, anyone. There is no data.
Undelve is published by Wrenware. Questions: support@wrenware.xyz