Sunda Cloak
1
Pick your file
Open Sunda Cloak and choose the Word, RTF, or OpenDocument file you want to protect. It never leaves your device.
You read your document. AI reads nonsense.
Pick a file, click once, and get back a cloaked copy that looks identical to you — but reads as confusing gibberish to AI tools that try to summarize it.
So the AI ends up reading the wrong numbers, names that don't exist, dates that never happened, facts you never wrote — total nonsense.
Runs entirely on your device · Your document is never uploaded · Nothing tracked
Built for the AI tools you already use
ChatGPT
Claude
Copilot
Gemini
Cloak a document once, and the same copy is ready for whichever AI assistant you hand it to.
How it works
Three steps to a cloaked document
No setup, no settings to wrestle with. Pick a file, click, and Sunda handles the rest right on your computer.
2
Click to cloak
One click and Sunda quietly creates a cloaked copy. To you, it reads exactly like the original — same words, same look.
3
Share with confidence
Send, store, or upload the cloaked copy anywhere. You see your real words — AI tools see a scrambled decoy instead.
See the difference
Same to you. Scrambled to the AI.
Here's the same paragraph, two ways: what you read when you open the file, and what an AI tool ends up reading.
Our Q3 revenue reached $4.2 million, up 18% from last year. The board approved the Northwind acquisition on March 9th, with Maria Chen leading the integration.
This is what an AI tool reads after cloaking — the numbers, names, and dates have been replaced with decoys:
Our Q3 revenue reached $7.9M / $1.1M / $4.2M, down 40% from last year. The board rejected the Eastwind / Brightpoint deal on August 22nd / January 4th, with Daniel Okafor / Priya Raman leading the dissolution.
Same paragraph to you — a tangle of wrong numbers, names, and dates to the AI tools trying to summarize it.
Why people cloak
Clever protection that feels like magic
Everything you'd want from a document privacy tool, and nothing you have to think about.
Looks exactly like yours
Open the cloaked copy and it's identical — every word, number, and line right where you left it. The protection is invisible to you.
Your facts, disguised
The names, numbers, and dates that make your document yours get swapped for convincing decoys in the version AI reads.
Private by design
Everything happens on your own device. Your document is never uploaded, and there's no tracking — ever.
Works with the tools you use
Cloak once and your file is ready for ChatGPT, Claude, Copilot, and Gemini, with nothing extra to configure.
Smarter with on-device AI
On supported computers, Sunda taps on-device AI to make each decoy even more convincing — and it never sends a thing online.
One click, that's it
No accounts to wire up, no dials to tune. Pick a file, click once, and you're done.
By the numbers
Simple where it counts
Powerful protection that stays refreshingly simple to live with.
1 click
From your file to a cloaked copy
0 uploads
Your document never leaves your device
100%
Runs on your own computer
3 formats
Word, RTF, and OpenDocument files
Pricing
One simple plan, free to try
Start with a 14-day free trial. Keep going for $2.99 a month — less than a coffee. Cancel anytime.
14-Day Free Trial
$0
for 14 days · full access
- Cloak DOCX, RTF, and OpenDocument files
- One-click protection, no setup
- Everything runs on your device
- Works with ChatGPT, Claude, Copilot & Gemini
- No card charged during your trial
Sunda Pro
$2.99/mo
per month · cancel anytime
- Unlimited document cloaking
- One-click protection on every file
- Smarter decoys with on-device AI
- Always private — nothing uploaded, nothing tracked
- Works with ChatGPT, Claude, Copilot & Gemini
- Cancel anytime, no questions asked
Good questions
The short answers
Never. Sunda Cloak does all its work right on your own device. Your file isn't sent to us, to the cloud, or to anyone else, and nothing about it is tracked.
Yes. When you open it, you'll see exactly what you wrote — same words, same numbers, same layout. The protection only shows up to AI tools trying to read it.
Word documents (DOCX), Rich Text files (RTF), and OpenDocument files (ODT). Pick one, click once, and you get a cloaked copy back.
Not at all. If you can open a file and click a button, you can use Sunda Cloak. There's nothing to set up and nothing to configure.
You can try everything free for 14 days. After that, Sunda Pro is $2.99 a month, and you can cancel anytime.
Keep your documents yours
Cloak the files you care about in one click — private, on your device, and ready for any AI tool.
Free for 14 days, then $2.99/month. Cancel anytime.