7-Zip Archive — High-ratio archive format created by 7-Zip.
Quick facts
What is .7z
A .7z file is a 7-Zip Archive — High-ratio archive format created by 7-Zip.
In the mime-db registry it maps to application/x-7z-compressed, and it is marked as non-compressible. When serving .7z over HTTP, set the Content-Type header as shown in Developer info below.
Related entities: it maps to application/x-7z-compressed — and is delivered over HTTP via the Content-Type header.
How to open .7z files
Developer info
When served over HTTP, responses should set the following header:
Content-Type: application/x-7z-compressed
Common software that reads/writes .7z:
Relation chain
Related extensions
Related MIME types
Common uses
How to edit .7z files
How to create .7z files
Frequently asked questions
Common options include 7-Zip, WinRAR. You can also open many of these files with built-in viewers or a browser.
Create a new file in any text editor or the app that owns the format and save it with the .7z extension.
application/x-7z-compressed is the media type identifier used for .7z files during network transfer (for example in the HTTP Content-Type header).
Sources & standards
Updated 2026-08-18
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