Local-only No servers ChatGPT / Gemini / Claude

Protect sensitive data before it reaches AI chats.

PasteSafe detects sensitive patterns when you paste text into ChatGPT, Gemini or Claude and lets you replace them with masked placeholders before sending.

It helps prevent accidental leaks of API keys, emails, URLs, IDs, phone numbers, amounts and other sensitive values in prompts, shared chats or screenshots.

Available on Chrome Web Store. Runs locally. No tracking.

Example paste Ask before insert
Email: john.petrov+demo@company.co.uk
API key: sk-1234567890abcdef1234567890abcdef
Money: $48,000.50

Safe version →
Email: [EMAIL#1],
API key: [API_KEY#1],
Money: [AMOUNT#1]
Works locally no text leaves your browser
• Detects patterns on paste
• Masks tokens before insert
• Saves only settings + counters
Live demo mask before send
PasteSafe demo showing sensitive data detection and masking before sending to an AI chat

1. Paste text

Paste content into a supported AI chat interface such as ChatGPT, Gemini or Claude.

2. Review sensitive data

PasteSafe detects risky patterns locally and shows what can be masked before insertion.

3. Insert a safer version

Replace detected values with placeholders and continue your workflow with minimal friction.

Prevents accidental leaks

Catch secrets before they end up in prompts, screenshots or copied prompt history.

Fast and lightweight

No accounts. No backend. Runs only when you paste into supported sites.

Built for daily workflows

Great for developers, analysts, PMs, founders and anyone using AI tools at work.

About PasteSafe

PasteSafe was created as a small safety layer for everyday AI workflows. People copy logs, configs, snippets, account data and notes all day long — and sometimes paste them into the wrong place.

AI chats are incredibly useful, but they also make careless pastes more likely. PasteSafe helps reduce that risk by detecting common sensitive patterns on paste and giving you a chance to mask them before they appear in the chat input.

Principles

  • Local-first: detection runs in the browser
  • No backend and no server-side text processing
  • Fast, minimal UX that stays close to the native paste flow

What PasteSafe can detect

  • API keys
  • Email addresses
  • Phone numbers
  • UUIDs / identifiers
  • URLs
  • Financial amounts

Who it is for

Developers, analysts, PMs, founders, support teams and anyone who regularly uses AI tools while handling semi-sensitive text from real projects.

Contact

pastsafe.ext@gmail.com