lookup> .p7m

.P7M·File Extension

P7M Data & Text — A .p7m file is a P7M Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.

Data & Textapplication/pkcs7-mime

Quick facts

Extension.p7m

File typeP7M Data & Text

MIME typeapplication/pkcs7-mime

CategoryData & Text

Charset—

Compressible—

What is .p7m

What is a .p7m file?

A .p7m file is a P7M Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.

In the mime-db registry it maps to application/pkcs7-mime. When serving .p7m over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to application/pkcs7-mime — and is delivered over HTTP via the Content-Type header.

How to open .p7m files

Use VS Code or Notepad++ to open and edit .p7m files.
Any text editor (Notepad, VS Code) can inspect the raw content as text.

Developer info

When served over HTTP, responses should set the following header:

Content-Type: application/pkcs7-mime

Common software that reads/writes .p7m:

VS CodeNotepad++Sublime Textjq

Relation chain

.p7mextension of

format

P7M Data & Textserved as

mime type

application/pkcs7-mimesent via header

http header

Related extensions

Related MIME types

application/pkcs7-mime

.p7m .p7c

Common uses

Configuration files
Data interchange between systems
API request and response payloads
Logs and data exports

How to edit .p7m files

Open the file with VS Code, make your changes and save.
Most editors preserve the original formatting and encoding — avoid changing the charset.

How to create .p7m files

Create a new file and save it with the .p7m extension, or export this format from VS Code.

Frequently asked questions

What programs can open .p7m files?

Common options include VS Code, Notepad++, Sublime Text. You can also open many of these files with built-in viewers or a browser.

How do I create a .p7m file?

Create a new file in any text editor or the app that owns the format and save it with the .p7m extension.

What is the relationship between .p7m and the application/pkcs7-mime MIME type?

application/pkcs7-mime is the media type identifier used for .p7m files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-09-13

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