P7S Universal Viewer Alternatives

Apps similar to P7S Universal Viewer include OpenSSL, which is free and open source. Other options are Unp7m and P7MEx. In total there are three Cryptography Libraries like P7S Universal Viewer for Windows, Linux and Mac.

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P7S Universal Viewer alternatives page was last updated Oct 26, 2026

OpenSSL
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OpenSSL is a framework which implements the secure socket layer. It ships with a program/library which gives you access to all those functions.
12 OpenSSL alternatives
Cost / License
Free
Open Source (Apache-2.0)
Application type
Cryptography Library
Origin
United States
Since
Since 2010
Platforms
Windows
Mac
Linux
BSD
Haiku
United States
Good alternative?Is OpenSSL a good alternative to P7S Universal Viewer?
Unp7m
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With just a click open one or more .p7m (pkcs#7 signed file) from your PC's browser, decrypts .p7m live and displays the contents of the file. No downtime.
Cost / License
Free Personal
Proprietary
Since
Since 2022
Platforms
Windows
Good alternative?Is Unp7m a good alternative to P7S Universal Viewer?
P7MEx
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User friendly GTK utility to extract PDF documents from signed P7M files.
Cost / License
Free
Open Source (MIT)
Origin
Italy
EU
Since
Since 2026
Platforms
Linux
Python
Flatpak
Italy
EU
Good alternative?Is P7MEx a good alternative to P7S Universal Viewer?

3 of 3 P7S Universal Viewer alternatives