Don't Paste Secrets
into ChatGPT.
A secure desktop app that hides names, numbers, and sensitive details in your files before you share them with AI companies.
please find the Q1 financials below:
Revenue: $2,847,392
Client: Siemens AG (Contract #SK-4821)
Contact: Lisa Weber
Email: l.weber@siemens.com
Phone: +1 (555) 839-4521
Best regards,
Anna Schmidt
CFO, Berger & Partners Inc.
Redact First. Prompt Freely.
MaskBase strips patient names, MRNs, provider identities, and dates while preserving the clinical context the LLM needs to produce a medically useful answer.
Exposed Data
UNSAFELab result report
Laboratory Report — Comprehensive Metabolic Panel
Patient Maria Gonzalez (DOB 04/12/1971, MRN 00847293). Ordered by Dr. James Okafor at St. Luke's Regional Medical Center. Collected Feb 3, 2026.
Glucose: 214 mg/dL [H]
Creatinine: 2.1 mg/dL [H]
eGFR: 34 mL/min [L]
Potassium: 5.2 mEq/L [H]
CO2: 19 mEq/L [L]
HbA1c: 9.2% [H]
Sanitized
SAFEReady for the LLM
Laboratory Report — Comprehensive Metabolic Panel
Patient [PATIENT_NAME] (DOB [DOB], MRN [MRN]). Ordered by [PHYSICIAN] at [FACILITY]. Collected [DATE].
Glucose: 214 mg/dL [H]
Creatinine: 2.1 mg/dL [H]
eGFR: 34 mL/min [L]
Potassium: 5.2 mEq/L [H]
CO2: 19 mEq/L [L]
HbA1c: 9.2% [H]
LLM-Ready Result
Clinically useful output — zero patient data exposed
Ask the model
Which values are outside the normal range, and what could they indicate?
Useful output
Five values are flagged: Glucose (214 mg/dL) and HbA1c (9.2%) are significantly elevated, pointing to poor glycemic control. Creatinine (2.1 mg/dL) is high while eGFR (34 mL/min) is critically low, suggesting reduced kidney function. Low CO2 (19 mEq/L) alongside elevated potassium may indicate early metabolic acidosis. These results warrant prompt clinical review.
See It in Action
Watch MaskBase sanitize a real document in seconds
Using AI with Sensitive Data is Risky
Every paste into ChatGPT is a potential compliance violation
Blocked by IT?
Bypass restrictions compliantly — your data never leaves your machine.
Fear of Leaks?
Never expose raw client data, financials, or PII to external services again.
Manual Redaction?
Stop wasting hours scrubbing PDFs and spreadsheets by hand.
The MaskBase Pipeline
Three steps from sensitive data to safe AI prompting
Connect Files
Local Only
Import your sensitive PDFs, CSVs, and documents directly on your desktop. Everything stays local — nothing is uploaded.
Auto-Sanitize
Define Manifest
MaskBase automatically detects and redacts PII, client names, financial figures, and secrets using your custom rules.
Safe Prompting
Send Sanitized
Send only the sanitized prompt to ChatGPT, Claude, or Gemini. Your secrets never touch the cloud.
Built for Compliance & Control
Enterprise-grade security features for anyone using LLMs with sensitive data
GDPR Compliant Redaction
Automatically detect and mask personally identifiable information to meet global privacy standards.
Local-Only Processing
All redaction happens on your device. Your raw files never leave your computer.
Custom Data Manifest
Define your own rules for what to redact: client names, revenue figures, internal codes.
Audit Logs for IT
Complete transparency with exportable logs showing what was redacted and when.
Frequently Asked Questions
Everything you need to know about MaskBase.
Stop Leaking Secrets.
Start Using AI Safely.
Join the beta and get early access to MaskBase for macOS and Windows.