For accountants and lawyers

AI, without your clients' data.

ContextDeck hides the ID numbers, emails, phone numbers and bank accounts in each document on your own computer, before it reaches ChatGPT, Claude or Copilot. You see what was hidden, and you keep a dated record.

Get it from Microsoft Store
  • 14-day Pro trial, no card
  • Nothing is uploaded
  • In English and Spanish
Card statement · Visa Sample · September 2026
CardholderMARIA J. FUENTESCardholder name 1
ID number12345678ZID 1
Email[email protected]Email 1
Phone+44 20 7946 0322Phone 1
08/22 Sample Store$559.56
08/25 Online shop$316.92
09/02 Video subscription$71.90
Total billed$948.38

The numbers add up: 3 movements sum $948.38, the billed total.

Your AI reads the amounts and the dates, but not whose they are: "ID 1" is the same person in every document.

The problem

Your client trusted you with their data, not ChatGPT.

Your team already uses AI on client documents. The question is what data goes with them.

Pasting is sending.

A statement or a contract pasted into an AI chat takes your client's ID number, account and email to a third party.

Deleting by hand falls short.

It takes time on every document, and something always slips through on page fourteen.

Data protection laws are here.

The GDPR in Europe, the LGPD in Brazil or Chile's Law 21.719 ask you to protect other people's personal data and, the newest ones, to be able to show how you do it.

In 60 seconds

Watch it work on a card statement.

No sound, with the text on screen and invented data.

How it works

Three steps, all on your computer.

What you see in the video, step by step.

1 · Convert

Drop the documents in and choose whose they are.

PDF, Word, Excel and PowerPoint; with Pro also whole folders, scanned PDFs and photos. The app turns them into text any AI understands, tables intact.

2 · Review

You see exactly what was hidden, and what is still visible.

Every hidden item is marked in the document. If something that looks personal is still showing, the app tells you before you copy and you hide it in one click. If something hidden was not personal, you show it again.

3 · Copy

Everything for a client, to your AI in one click.

Copy one document, or all of a client's, as a single text with your question at the end: "Do the net, the tax and the total agree?", "Detect risks, deadlines and obligations", or one of your own. Paste it into ChatGPT, Claude or Copilot.

Who it is for

Made for working with client documents.

  • Statements that add upThe app checks that the movements sum the billed total, and tells you before the AI reads them.
  • Invoices checkedIt verifies that net plus tax make the total, and shows the difference when they do not.
  • Each client's documents togetherStatements, invoices and returns in their client, ready to ask the AI for the month's analysis.
    Categorize the expenses of the periodAdd up the invoices: net, tax and total
The question, suited to the document.
What it hides and what is recorded

The personal data stays. What you did is on record.

On its own
ID numbers from 32 countries (DNI and NIE, CPF, Aadhaar, Codice fiscale, BSN, PESEL, CURP, RUT and more), emails, phone numbers, cards and bank accounts.
With you, once
Your clients' and companies' names, and fields on your forms such as "Address" or "Case file".
What it does not do on its own
Recognize a name inside a paragraph. That is why it shows you what is still visible before you copy, and you hide it by selecting it.

Every conversion with hidden data leaves a record: what was hidden, in which files, when and on which computer; never the original values. With Teams, the whole firm hides the same things.

ContextDeck lowers the risk of exposing personal data when you use AI and keeps a record of what you did. It does not replace legal advice on complying with the law where you work.

Pricing

Try it on a client's documents.

Download free. From the app, turn on Pro for 14 days with your email, no card. Prices in US dollars, taxes included.

Free

US$0

Forever

To see what personal data is in your documents.

  • Up to 3 files at a time, 30 a month
  • Marks the personal data it finds (does not hide it)
  • Checks whether statements and invoices add up
  • One client
14 days free

Pro

US$9 a month

or US$86 a year

For a professional working with client documents.

  • Hides the data before you copy, with its record
  • Unlimited clients and documents
  • Scanned PDFs, photos and whole folders

Teams

US$19 per seat a month

From 3 seats · or US$182 per seat a year

For a firm that must protect data the same way on every computer.

  • Everything in Pro, on every seat
  • One shared profile: countries, clients and fields to hide
  • A record from every computer

Prices in US dollars, taxes included; at checkout, Paddle charges in your local currency. Cancel anytime. 14-day refund.

Who is behind it

ContextDeck is made by Malow Software, a small team that answers every message at [email protected] within one business day.

Questions

Before you download.

Are my documents uploaded anywhere?

No. They are converted and their data hidden on your computer. The app only goes online to check your license and look for updates, never with a document.

Does the AI still understand the document with the data hidden?

Yes. Amounts, dates and text stay intact, and each hidden item has a stable marker: "ID 1" is the same person in every document, so the AI can reason about the matter.

Does this make me compliant with data protection law?

Not on its own. It helps you avoid exposing client data when you use AI and keeps a record of what you did. Full compliance with the law where you work is for your adviser to define.

Why not upload the PDF straight to ChatGPT?

Because the PDF carries all of your client's data. ContextDeck gives your AI the same content without it, and puts a client's documents together in a single request.

What currency do I pay in?

Prices are in US dollars, taxes included. At checkout, Paddle charges in your local currency. There is a 14-day refund.

Does it work on Mac?

For now only on Windows 10 and 11, from Microsoft Store, which keeps it up to date.

Try it on one of your client's documents. See what gets hidden.

Two minutes to install from Microsoft Store. 14 days of Pro, no card.

Download free for Windows