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How to Use Claude Behind a Google Docs Interface

28 July 2026 · 5 min read

GPTDisguise started as a ChatGPT tool, but Claude has its own distinctive interface — and its own recognisability problem. Here is how to run Claude behind the Google Docs disguise, and what is different about it compared to the ChatGPT version.

Why Claude needed its own support

A disguise is not a generic overlay. It works by restyling the specific elements a site renders, which means it has to be built against that site's actual structure. Claude's layout, its message containers and its input area are nothing like ChatGPT's, so the ChatGPT disguise could not simply be pointed at it — the result would have been a broken half-skin, which is considerably more conspicuous than no skin at all.

Claude support is therefore a separate implementation targeting Claude's own DOM, and it lives on the Premium plan.

What you need

• Chrome, or Firefox (the Firefox build is in beta)
• A GPTDisguise account
• A Premium or Lifetime plan — Claude is not on the free tier
• A Claude account, which is separate and comes from Anthropic

Step 1: Install the extension

Add GPTDisguise from the Chrome Web Store or from Mozilla Add-ons. The download is around 0.3 MB. Full detail in our installation guide.

Step 2: Create an account and confirm your email

The free Google Docs disguise for ChatGPT works with no account at all. Premium features need one, because that is how the extension knows your plan.

Create an account, then check your inbox for the confirmation email and click the link before signing in. If it has not arrived after a minute or two, check your spam folder — confirmation mail from newer domains lands there more often than anyone would like.

Step 3: Upgrade to Premium

Two options, both covering Claude:

• Premium, $4/month — Claude, Gemini (alpha), Microsoft Word and Notion themes, keyboard shortcuts, session memory.
• Lifetime, $20 one-time — everything in Premium plus all future Premium features, with no recurring billing.

Payment goes through Stripe. The extension picks up your plan from your signed-in session, so there is no licence key to paste anywhere.

Step 4: Open Claude and toggle the disguise

Go to Claude and sign in as normal. Click the GPTDisguise icon in your browser toolbar and turn the disguise on. Claude re-renders inside the Google Docs frame: document title bar at the top, toolbar row beneath it, your conversation flowing down the page like document body text.

On Premium you can bind this to a keyboard shortcut, which is worth doing. The visible tell is almost never the screen itself — it is the person reaching for their mouse when someone approaches.

Switching between ChatGPT and Claude

The disguise applies per site, so both can be open in different tabs with the disguise active in each. Moving between them is an ordinary tab switch and there is no cover to re-establish.

Other themes

Google Docs is the default, but Premium also includes Microsoft Word and Notion skins. The right pick is whatever is unremarkable in your particular office — a Word document on a Windows-heavy floor draws less attention than a Google Doc, and vice versa. Microsoft Excel is on the roadmap.

What this does and does not do

Same caveat as everywhere else on this site, because it matters more than any feature list. The disguise is CSS and JavaScript running in your own browser. There is no GPTDisguise server in the path, so no additional copy of your conversation is created — your messages go to Anthropic exactly as they would without the extension.

Which also means it changes only what a person glancing at your screen perceives. It does not affect network logs, an IT monitoring agent, or your browser history, and it will not stop someone reading over your shoulder — the text on screen is still plain text. It solves recognition at a glance, and that is the whole of it.