Compare with Incognito

About

One click, and the page you're viewing opens again in an incognito window next to it — same URL, half the screen each. No logged-in cookies, no cache, no history on the right side. Your regular session stays on the left.

No popup. No menu. Click the toolbar icon and the window snaps into place.

Who it's for
• Web developers — isolate whether a bug is account-specific or environmental, verify releases against a clean cache and cookie state, reproduce user-reported issues as a signed-out visitor.
• SEO and content marketers — see Google search results without personalization, confirm whether an updated page has actually propagated, view your own site the way a fresh visitor would.
• Site owners, designers, and bloggers — edit your site while watching how a logged-out visitor sees it in real time.
• QA engineers and testers — reproduce bugs in a clean state next to your reproduction notes.
• Anyone auditing their own profile — see how your Instagram, X, LinkedIn, portfolio, or personal site appears to someone who isn't signed in.
• Anyone who wants a clean session alongside their main one — read articles without polluting history, compare personalized prices, or just bypass paywall counters.

How to use
1. Open any http/https page.
2. Click the "Compare with Incognito" toolbar icon.
3. Your window moves to the left; an incognito window opens on the right with the same URL.

First-time setup
Incognito windows require explicit permission. If the extension can't open one, Chrome's extension settings page will appear — toggle "Allow in Incognito" on, then try again.

Optional: assign your own keyboard shortcut
Want a hotkey? Open chrome://extensions/shortcuts and set any combination you like for "Compare with Incognito".

What this extension does NOT do
• No data collection. No analytics. No trackers.
• No external servers. Everything runs locally in your browser.
• Only two Chrome permissions are used: "tabs" (to read the current URL) and "system.display" (to size the two windows to your screen).

Free. No account required. No sign-in.

Privacy policy: https://kasuyaofcb.github.io/chrome-extensions-legal/compare-with-incognito/privacy.html