Now with context-aware masking

Stop leaking secrets
into AI chat

OmniShield intercepts your prompts before they leave the browser, replacing API keys, passwords, and PII with safe placeholders — on your device, zero servers.

Add to Chrome — Free See pricing →

Works on·ChatGPT·Claude·Gemini·Perplexity·Cursor·Free & Pro

BeforeRaw prompt

Summarize this outage and suggest a fix.

OPENAI_API_KEY=sk-live-91x7nA3Pk...

Customer email: anuj@omnishield.app

Stripe token: tok_4Kx8mP0...

AfterMasked locally

Summarize this outage and suggest a fix.

OPENAI_API_KEY=[api_key_openai_prod]

Customer email: [email_customer_primary]

Stripe token: [payment_token_checkout]

On-deviceNo prompt upload to OmniShield

Wire-levelRaw secrets never leave the browser

FastProtection happens before send

Before send, secrets become safe placeholders while the request stays intelligible to the model.

How it works

Three steps. No account required.

Install once, protect every AI conversation automatically.

Install from Chrome Web StoreAdd OmniShield and pin it to your toolbar in one click.
Chat as usualPaste code, logs, configs, or messages into ChatGPT, Claude, Gemini, or Cursor — nothing changes in your workflow.
Secrets get masked at send timeMatching keys and PII become safe placeholders on your device before the request leaves the browser.

Features

Built for people who paste into AI

Developers, founders, and security teams who use LLMs daily without leaking credentials or customer data.

🛡️

Wire-level masking

Hooks the send path so the raw secret never reaches the AI provider's servers — not just a visual blur or warning.

📱

On-device by design

Free and Pro process prompts locally. Your chat content never touches OmniShield's infrastructure.

⚡

Zero latency

Masking runs in microseconds at the browser level — no round trip, no perceptible delay.

🔑

100+ secret patterns

OpenAI, AWS, GitHub, Stripe, GCP keys + emails, cards, phone numbers, and custom rules (Pro).

🏥

HIPAA-aware (Pro)

Healthcare pattern pack detects PHI — names, DOBs, MRNs — for clinical workflows.

Pro

Context-aware masking

Free finds secrets. Pro replaces them with format-preserving masks so the AI can still reason about your request.

Basic maskingSafe, but lossy

CardXXXX-XXXX-XXXX-XXXX

API keyXXXXXXXXXXXXXXXXXX

EmailXXXX@XXXX.XXX

Pro maskingReadable, still private

Card[visa_card_customer_01]

API key[openai_key_server_prod]

Email[billing_email_primary]

Pro keeps the structure and role of a secret clear without exposing the original value.

Normal masking (Free)

Detects known secret and PII shapes — API keys, tokens, emails, cards — and blocks them before send.

Context-aware masking (Pro)

Replacements preserve format and role (key-like, card-like, identity-like) so AI can still reason about your request — without ever seeing the real value.