Package Exports

detectincognitojs/dist/detectIncognito.esm.js

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Readme

detectIncognito.js

Efficiently detect Incognito mode & other private browsing modes across most modern browsers.

Shameless plug: Looking for a powerful user tracking and bot detection solution?

Features

✅ Incognito detection on Google Chrome
✅ Private Window detection on Safari (macOS)
✅ Private Tab detection on Safari (iOS)
✅ Private Window detection in Firefox
✅ InPrivate Window detection on Microsoft Edge
✅ InPrivate Window detection on Microsoft Internet Explorer
✅ Private Window detection in Brave (see notes)
✅ Private Window detection in Opera

Demo

Check out the live demo.

Usage

Get the script from CDN (may be blocked by adblockers—see notes):

<script src="https://cdn.jsdelivr.net/gh/Joe12387/detectIncognito@main/dist/es5/detectIncognito.min.js"></script>

Or install via NPM:

npm i detectincognitojs

import { detectIncognito } from "detectincognitojs";

detectIncognito().then((result) => {
  console.log(result.browserName, result.isPrivate);
});

Supported Browsers

Browser	Platform(s)	Versions	Notes
Safari	All	≤ 18.4
Chromium	All	50 to 137 Beta	Detection broken by `predictable-reported-quota` flag (Issue #49)
Firefox	All	44 to 138
MSIE	Windows	11	Requires Promise polyfill

Notes

False positives can occur in certain browser setups or Chrome Guest mode (Issue #21).
Firefox Container Tabs aren't detected by this.
The script must run over HTTPS—running locally or via HTTP might fail.
Brave and uBlock Origin block the CDN; hosting the script yourself avoids this issue.
An error is thrown if the browser can't be identified.

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