PromptWall · The anonymization engine

The AI gets the structure, never the values.

PromptWall redacts personal, sensitive and confidential data from prompts, files and images before it reaches any AI tool. The answer still works.

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See redaction examples

In ChatGPT

This is what ChatGPT actually received.

Names, IDs and amounts are swapped for placeholders in flight. The reply is still a complete, usable answer.

ChatGPTGPT-5

Redacted by PromptWall

3customer_accounts_Q3.xlsxNames, SSNs and account numbers inside redacted

From this file, list every account more than 60 days overdue. Start with [PERSON_1], SSN [SSN_1], account [BANK_ACCOUNT_1], balance $48,250.

The names, SSNs and account numbers in this file are redacted, so I will refer to customers by their customer ID.

40 accounts are more than 60 days overdue. The largest is CUST-20417, 74 days late on $48,250. I would contact the five largest balances first and offer a payment plan to the rest.

Message ChatGPT

1
Redacted in flight
Name, SSN and account number are swapped for labelled placeholders before ChatGPT sees them.
2
The answer still works
ChatGPT works from customer IDs and balances. It never learns who the customers are.
3
Files too
Spreadsheets, PDFs and images are redacted the same way before upload.

Works across AI tools like ChatGPT, Claude, Gemini, Copilot and more.

What gets redacted

PII

Anything that identifies a person

NamesContact detailsGovernment IDsFaces in imagesand more

Sensitive data

Anything that grants access or carries risk

Payment and bank detailsHealth recordsCredentials and keysand more

Confidential data

Anything that belongs to the business

Source code and IPFinancialsClients and partnersInternal linksand more

Works onPromptsFile uploadsImagesPDFs

Each company sets its own policy and adds custom rules for its own terms. Each category can be set to redact, flag, block or off.

NexusNest

Meera KrishnanSign out

Redaction config

Everything here is sensitive. Choose what gets redacted before your prompts reach AI tools.

Save changes

5 of 6 categories enabledUnsaved changes

Highly critical

4 of 4 on

Each of these identifies a person or grants access on its own.

Select allClear

Turning any of these off may put your organisation at compliance risk under India's DPDP Act and the GDPR.

Category	Description	Status
Personal information	Emails, phone numbers, home addresses, dates of birth and government IDs. View examples (6)
What you type Update the KYC record: DOB 14/03/1988, mobile +91 98765 43210, email [email protected]. What the AI sees Update the KYC record: DOB [DATE_OF_BIRTH_1], mobile [PHONE_1], email [EMAIL_1].
Payment & account identifiers	Cards, bank accounts, IFSC, PAN and UPI IDs. Amounts are never redacted. View examples (5)
Health data	Patient IDs, medical record numbers, diagnoses and prescriptions. View examples (4)
Credentials & secrets	API keys, passwords, access tokens, connection strings and private keys. View examples (6)

Critical

1 of 2 on

Sensitive in combination. Ordinary alone, revealing once they sit together in one prompt.

Select allClear

Category	Description	Status
Financial figures	Balances, transaction values, salaries and revenue. Off by default. View examples (4)
Company names	Any organisation name, including products, brands and project codenames. View examples (4)

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