A train seat puts your laptop screen within easy reading distance of two strangers. Docognito disguises ChatGPT or Claude as a plain document for the whole ride, so the seat beside you and the one behind you see a page of text rather than a chat window. It does not hide the address bar from a close, deliberate read.
Reading distance, not a glance
An office walk-by lasts a second. A train seat does not work that way. The person next to you is there for the length of the ride, and the seat behind yours has a clear, raised line down onto your screen for just as long. Neither of them needs to be nosy. A screen lit up in a dim carriage draws the eye on its own, and a chat window full of coloured message bubbles and a repeating assistant name is one of the most recognisable shapes on a laptop screen today.
That is the actual problem a commute creates. Not one glance, but a sustained view, from more than one direction, for as long as you are typing.
An evening train makes it worse. Carriage lighting is dim enough that a bright laptop screen becomes the most noticeable thing in the whole row, and a chat window's high-contrast bubbles are built to be read at a glance in exactly that kind of light. A document page, by comparison, is closer to the brightness and layout of anything else somebody might be reading nearby, a book, a phone, a set of notes, and it draws less of the attention a lit screen otherwise pulls in on a dark carriage.
What changes on the screen
Docognito redraws claude.ai, chatgpt.com and chat.openai.com, and no other website as a plain document while you use it. The page becomes text on a page rather than a chat log, the browser tab stops reading ChatGPT or Claude in its title, and the tab icon stops matching either brand. All three of those are exactly what a passing glance, or a longer look from a nearby seat, actually lands on.
Turning it on or off is Shift and Escape, which both hides the disguise and brings it back. There is no menu to open and no settings screen to find on a moving train, which matters when you only have a few seconds before the person across the aisle looks up.
A laptop and tablet feature, not a phone
Docognito is built for one browser permission, storage, and that permission model only exists on desktop and laptop Chrome. If your commute involves a phone rather than a laptop, there is nothing to install, because mobile Chrome on Android and iPhone does not support browser extensions in the way a desktop build does. A laptop open on a fold-down tray table is the situation this article, and this extension, actually address.
If your commute is a mix, part of it on a laptop and part of it on a phone once you switch to a shorter connecting service, the extension only ever covers the laptop leg. That is worth knowing in advance rather than discovering partway through a trip, so you can plan which portion of a task to do on which device instead of assuming the same protection follows you onto a phone screen.
The address bar is still readable up close
This is the limit worth knowing before you rely on the disguise for anything more than a glance. the address bar, which still reads claude.ai or chatgpt.com The browser chrome sits above the page, outside anything an extension is allowed to redraw, and it stays exactly as readable to someone leaning over your shoulder as it was before you turned Docognito on. A stranger scanning your screen in passing will see a document. A person deliberately reading your address bar will not be fooled by one.
| What a train neighbour sees | Disguised | Still visible up close |
|---|---|---|
| The page you are typing into | Yes | No |
| The tab title and icon | Yes | No |
| The address bar | No | Yes |
The third row is the one that matters if the person beside you is the kind who reads deliberately rather than glances.
Settle in before you start typing
Turn it on before the train pulls out
Do this at the platform or your desk, not once the carriage is full and someone has already sat down. A visible toggle mid-trip is worse than no disguise at all.
Angle the screen away from the aisle
A disguise handles the shape a passer-by registers. A slight tilt away from the aisle and the seat behind you handles the rest, and the two together cover more than either does alone.
Know the keypress for a ticket check
A conductor walking the aisle is a longer, closer look than a passing glance. The same shortcut that turned the disguise on brings it back the instant you need it again.
Where you sit does work the extension cannot
If your commute means a laptop open on a train or bus and you would rather the screen not announce itself, Docognito covers the part of that problem a browser extension can actually reach: the page, the tab title and the icon. It will not hide the address bar from someone reading it on purpose, and it does nothing for a phone. For everything else, a tilt of the screen and a bit of awareness of who is sitting where does the rest of the work.
Use Docognito before your next ride, so the toggle is already there when you need it.