← All free resources
Free kit · 5 min setup

Use AI on client work, without the leak

A copy-paste kit that hides private client data before it ever reaches an AI tool. The real details never leave your machine.

Abi Odedeyi By Abi Odedeyi · CodeFreeIQ
Privacy-safeNo installMac · Windows · Linux

Here's the quiet problem: the moment you paste a client's real emails, phone numbers or bank details into ChatGPT or Claude, that data has left your building. For bookkeepers, VAs, consultants, clinics and anyone handling other people's information, that's a real risk. This kit fixes it. It swaps sensitive values for safe placeholders (like [EMAIL_1]) on your own computer, so you can use AI freely, then swaps the real values back into the AI's answer afterwards.

Get the Redaction Kit

Pop your name and email in and I'll unlock the download right here, plus send it to your inbox so you always have it.

redact.py · one small file · no spam, unsubscribe anytime.

What it catches

Email addresses, any format
Phone numbers, UK & international
Bank details: sort codes, accounts, IBANs
Card numbers, 13 to 16 digit runs
National Insurance / SSN
Postcodes, UK format

See it work

Before (what you'd never want to paste) 
Review the file for client Jane Smith.
Email jane.smith@acmelaw.co.uk, mobile 07700 900123.
NI number AB123456C. Sort code 12-34-56, account 12345678.
After (safe to paste into any AI) 
Review the file for client Jane Smith.
Email [EMAIL_1], mobile [PHONE_1].
NI number [NINO_1]. Sort code [BANK_1], account [ACCOUNT_1].

How to use it

1

Drop your text in

Put whatever you want to clean into input.txt (the kit creates it for you on first run).

2

Run it

python redact.py gives you a clean redacted.txt and a private redaction_map.json.

3

Use your AI freely

Paste redacted.txt into Claude, ChatGPT, anything. The placeholders stay meaningful, so the AI still understands the context.

4

Swap the real values back

Paste the AI's reply into ai_reply.txt, run python redact.py --restore, and restored.txt has the real details back in place.

Honest note: this is a strong first line of defence, not a legal guarantee. It catches patterns (emails, numbers, codes) reliably, but it can't reliably spot names without risking false positives, so always give redacted.txt a quick eyeball before you paste it anywhere, and keep redaction_map.json private. It's the key that un-redacts everything.

Want AI systems built this carefully for your whole business?

This is the kind of guardrail I build into every client system. If you want AI that saves you hours without the risk, let's talk.

Book an AI Strategy Call →