DOMGuard

Hide secrets and hidden text on a web page before you share a screenshot or paste the page into an AI tool.

Masks and hidden-text checks run in your browser. The picture you capture is copied to the clipboard.

See what hidden text looks like

What it does

• Protect all sites hides hidden text as pages load and change, and can mask API keys, tokens, and card numbers. Emails and phone numbers stay off until you turn them on.
• Manual picker covers one element you click. Auto Scan & Mask covers keys, tokens, and card numbers on the current page. Card numbers are checked with the Luhn test.
• Masks are solid black or blurred. Hold Alt to peek while automatic masks are on.
• Capture area, a custom pixel size, or the visible area. A successful capture is copied to the clipboard.
• Show Hidden Text lists hidden text on the page and marks a possible instruction to an AI. That mark is a heuristic.

Keyboard shortcuts

These are the suggested keys in the extension manifest. You can change them at chrome://extensions/shortcuts. The popup and the welcome page show the keys Chrome currently has, including "Not set" when a command has none.

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