ClipSeal

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Open P7M files and S/MIME attachments from your Mac’s menu bar

By app.limit UG (haftungsbeschrankt) · Utilities

Why we expect it: A clear, focused utility for opening P7M and S/MIME files, with local extraction and no subscriptions.

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In short

ClipSeal is a Mac utility that opens P7M files and S/MIME attachments from the menu bar. It extracts their contents into a floating shelf where documents can be previewed with Quick Look, opened in default apps, saved, or dragged elsewhere. It stands out for checking digital signatures and certificate trust, and for extracting encrypted files when a matching key is in the macOS Keychain.

Summary by Debuts, based on the App Store listing.

About

Open P7M files and S/MIME attachments from your Mac’s menu bar.

Copy a supported attachment in Mail, Outlook or Finder, or choose a file manually. ClipSeal extracts the documents and displays them in a floating document shelf.

• Preview documents with Quick Look. • Open files in their default apps. • Save copies or drag them into another app or folder. • Check digital signatures and certificate trust. • Extract encrypted containers when a matching private key is available in your macOS Keychain. • Choose your preferred shelf corner and enable or disable clipboard watching.

Documents are extracted locally on your Mac. Signature and certificate checks may require network access. Original files remain unchanged.

Extracted documents are temporary working copies. Save or export anything you want to keep before closing its tile, clearing the shelf or quitting ClipSeal.

ClipSeal is free, with no subscriptions or in-app purchases.

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