Workflow
Three steps. Zero risk.
Your sensitive data never touches a server. The detection model runs locally in your browser.
Paste your prompt
Paste any text into the Mask editor. Our AI engine automatically detects names, emails, SSNs, credit cards, phone numbers, API keys, and more.
Copy the sanitized version
PII is replaced with deterministic tokens like <PERSON_1> and <EMAIL_1>. Copy the clean prompt and paste it into any LLM — ChatGPT, Claude, Gemini.
Restore the LLM response
Paste the LLM response back into the Unmask tab. Your original data is rehydrated from an encrypted in-memory vault — then the vault is destroyed when you close the tab.
Features
Built for professionals who care about privacy
Smart PII Detection
Our AI engine runs entirely in your browser and detects both structured and unstructured personal data — names, emails, IDs, financial details, contact info, API keys, and more — with high accuracy. No server. No upload. No exposure.
Perfect Round-Trips
Same data → same token, every time. Originals restored exactly, even if the LLM tweaks the placeholder format.
Ephemeral Encrypted Vault
Token↔plaintext mappings are encrypted with AES-256-GCM and stored only in volatile memory — never written to disk, never sent anywhere. The vault is permanently destroyed the moment you close the tab. Zero persistence by design.
Ready to protect your data?
No sign-up. No server. No risk. Open the tool and start masking in seconds.
A product of Upward Byte LLC