If you have an Android phone and you received a .p7m file, opening it is easier than you think. Let's see how to open a .p7m file on Android, with or without an app.
Why Android doesn't open .p7m files
The .p7m is a digitally signed file (PKCS#7 / CAdES) that contains the actual document. Android does not recognize the signature envelope and shows "unknown file". The file is intact: it just needs to be extracted.
Method 1 — the free P7M Viewer app
The most convenient way on Android:
1. Install P7M Viewer from Google Play.
2. Open the app, or share a .p7m file to the app from email, WhatsApp or File.
3. The document appears immediately: view or save it.
Method 2 — from the browser
Don't want to install anything?
1. Open the P7M Viewer Open .p7m tool in Chrome.
2. Tap Choose File and select the .p7m.
3. View or download the document.
Even electronic invoices
Many .p7m files on Android are electronic invoices in `.xml.p7m` format. P7M Viewer shows them in the form of a readable invoice, not as XML code.
Privacy guaranteed
The file is not uploaded to any server - processing takes place in your phone's browser. Perfect for confidential documents.
Frequently asked questions
Is opening a .p7m on Android free? Yes, a single file is free.
Do I really need the app? No, it also works from the browser; the app is faster.
What versions of Android? All recent versions.
In summary
To open a .p7m file on an Android mobile phone, use the free P7M Viewer app or your browser: load the file and read the document in a few seconds, for free and in privacy.
