PasteGuard for Mac

Name: PasteGuard for Mac
Author: byquan.app (developer not named on the site)

PasteGuard is a Mac menu-bar app that masks emails, API keys, card numbers and other private data on the clipboard right after you copy, so a normal paste into ChatGPT, Claude, Slack or email carries tokens like [EMAIL_1] instead, and a shortcut puts the real values back.

Visit PasteGuard for Mac ↗

FreemiumProprietaryNative macOS appby byquan.app (developer not named on the site) (unverified)

Why it matters

For anyone who pastes logs, configs or customer messages into AI chats and team tools. It's a safety net against leaking a password or customer detail by accident, with checks done on the Mac.

Highlights

Detects 26 types in 6 groups (keys and tokens, passwords, emails, phones, cards, addresses, database URLs and more); private keys and card numbers are removed outright.
Originals go to an encrypted vault on the Mac for 1 hour, 24 hours or 7 days; Control-Command-R restores them in an AI reply you copy.
Auto-mask needs no Accessibility permission; Safe Paste and Smart Command-V for chosen apps are optional.
The site says it makes no network requests of its own, saves no clipboard history and skips clipboards a password manager marks private.
Optional on-device name detection uses Apple Intelligence on macOS 27; Pro (coming soon) adds custom rules and CSV word lists.

Taken from the project's own README, docs or launch page. Claims about speed or accuracy are the maker's unless stated otherwise.

Try it if: You often paste error logs or customer emails into ChatGPT or Slack and worry about leaking a key or address.

Worth knowing: It only sees clipboard text: agents such as Claude Code or Codex that read files or the terminal directly bypass it, and it misses text in images, drag and drop, and typing. Detection is pattern-based and can miss things.

Quick facts

Pricing	Free with every feature except custom rules and CSV lists; Pro coming soon (price not announced)
Free or paid	Freemium
License	Proprietary
Language	Native macOS app
Platform	macOS 14 or later; Apple Intelligence check needs macOS 27; Windows not offered
GitHub stars	n/a (not a GitHub project)
Maker	byquan.app (developer not named on the site)not verified

Related ranking

See how established tools compare in Best AI Assistants for Everyday Work. New releases aren't scored until we review them against the rubric.

What we couldn't verify

quick_facts.maker (developer identity)

Checked 2026-11-04 from the tool's own pages. Prices and star counts change, so confirm on the official site. Listing here is not a ranking or an endorsement.