AI gets the context. Not your secrets.

Automatically hides names, emails, and API keys before you send prompts to AI.

Get started See how it works

Your data never leaves your machine

AI Input · What the model receives

Please help me respond to the support ticket from

Name

Key

regarding the 401 authentication error they reported.

Try it!

How it works

See how your data gets protected before reaching ChatGPT, Claude, or any AI.

You type or paste

Paste text with names, emails, API keys—whatever you need help with.

PasteGuard hides it

Your private data becomes [[PERSON_1]], [[EMAIL_1]], etc. before the AI sees it.

AI responds

The AI responds normally—it doesn't need your real data to help you.

You see originals

The response shows your real data again—automatically restored.

PasteGuard

Live

Requests 6 total

Masked 100% 6 of 6

Scan Time 97 ms avg

Rate 6 /hour

Time Model Lang PII Detected Secrets

16:21:19 gpt-5.2 EN PERSONEMAIL API_KEY

Masked prompt

Please help me respond to the support ticket from [[PERSON_1]] at [[EMAIL_1]] regarding the [[API_KEY_1]] authentication error.

16:19:06 gpt-5.2 IT EMAILPERSON PASSWORD

16:18:55 gpt-5.2 ES EMAILPERSONPHONE —

16:18:45 gpt-5.2 FR EMAILPERSON JWT

Works everywhere

One tool for ChatGPT, Cursor, Open WebUI, and your own apps.

Chat

Coming Soon

A browser extension that lets you chat about work emails, customer data, or personal matters without exposing real names, emails, or confidential details to AI providers.

ChatGPT Claude Gemini

Join the waitlist

Get notified when the browser extension launches.

Notify me One email when it's ready. No spam.

Preview

PasteGuard Auto + Manual

Auto-masking active

Today

847

Total

email 5

person 4

phone 3

⌘ ⇧ K to mask selected text

Apps

Use Open WebUI, LibreChat, or other AI apps without worrying about sensitive data leaving your machine.

Open WebUI LibreChat

Open WebUI or LibreChat

PasteGuard

[[EMAIL_1]] sarah@acme.com

OpenAI, Anthropic, ...

Coding Tools

Get AI help with your codebase without accidentally leaking API keys, passwords, or connection strings from your config files.

Cursor Claude Code Copilot Windsurf

.env.local

1 # Database

2 DATABASE_URL=postgres://localhost:5432/app

4 # API Keys

5 OPENAI_API_KEY=[[API_KEY_SK_1]] masked

6 ANTHROPIC_API_KEY=[[API_KEY_SK_2]] masked

8 # AWS Credentials

9 AWS_ACCESS_KEY_ID=[[API_KEY_AWS_1]] masked

10 AWS_REGION=us-east-1

PasteGuard Active

3 secrets masked ENV UTF-8

API Integration

Build AI-powered apps that handle user data responsibly—protect customer information before it reaches third-party APIs.

OpenAI API Anthropic API Custom Apps

Your App

PasteGuard

[[EMAIL_1]] sarah@acme.com

OpenAI, Anthropic, ...

Protected automatically

Detects over 30 types of sensitive data across 24 languages.

Names Emails Phone numbers Credit cards IBANs IP addresses Locations API keys SSH keys JWT tokens Passwords Connection strings Private keys Bearer tokens