PasteGuard

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Tagline:Client-side secret/PII scanner — check before you paste into an AI

Updated:October 22, 2026

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AI Developer Tools Prompt Engineering Tools AI Detection & Humanization Free Open Source Web App Privacy-Focused Offline Support Self-Hosted Zero Setup For Developers

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What is PasteGuard?

PasteGuard is a free, fully client-side browser tool that scans text for API keys, tokens, private keys, and common PII before you paste into ChatGPT, Claude, Copilot, or other AI chats. Scanning stays in your browser — nothing is uploaded. No accounts, no backend, and it works offline after the page loads. Review findings, copy a redacted version, and paste safer text into AI tools.

How to use PasteGuard?

Open https://pasteguard-exp2.netlify.app, paste the text you plan to send to an AI, review any flagged secrets or PII, then copy a safer version.

PasteGuard Core Features

Local-only scanning

All detection runs in your browser. Pasted text is never uploaded to a server.

Secrets and PII patterns

Flags API keys, bearer tokens, private keys, env-style secrets, emails, phones, IBANs, and card-like numbers.

Redacted copy

Copy a scrubbed version with placeholders so you can still share context with an AI safely.

No account required

Free static web app with no signup, ads, or analytics that read pasted content.

Offline after load

Once the page and assets load, scanning works without a network connection.

PasteGuard Use Cases

Check .env snippets or logs before pasting into ChatGPT or Claude

Redact API keys and tokens from support or debug text

Teach safer AI paste habits for teams and students

Self-host a privacy-first pre-paste scanner on any static host

PasteGuard Frequently Asked Questions

Does PasteGuard upload my text?

No. Scanning runs entirely in the browser. Your text is not sent to a PasteGuard backend.

Is PasteGuard free?

Yes. It is free to use with no account, and the source is public on GitHub.

What kinds of secrets does it detect?

Common API keys, bearer tokens, PEM private keys, env-style secrets, and common PII patterns such as email, phone, IBAN, and card-like numbers. Detectors are heuristics, not a guarantee.

Can I self-host it?

Yes. It is a static site with no backend. Host the files on Netlify, GitHub Pages, or any static host.

PasteGuard Product Background & Official Links

PasteGuard Support Email & Customer service contact & Refund contact etc.

More Contact, visit the about us page(https://github.com/ExtendedUser/pasteguard)

PasteGuard Individual Info

PasteGuard Individual name: ExtendedUser

PasteGuard Developer Type: individual

More about PasteGuard, Please visit the about us page(https://github.com/ExtendedUser/pasteguard)

PasteGuard Pricing

PasteGuard Pricing Link: https://pasteguard-exp2.netlify.app

PasteGuard GitHub

PasteGuard GitHub Link: https://github.com/ExtendedUser/pasteguard

PasteGuard Pricing & Plans

Free

Free forever

Unlimited local scans
No account
Open source on GitHub
Self-hostable static files

Subscribe & upgrade now

PasteGuard Tags

Free Open Source Web App Privacy-Focused Offline Support Self-Hosted Zero Setup For Developers Secure Data

Best Suited Occupations for PasteGuard

Software Developers Indie Hackers IT Ops & Security Students Legal & Compliance