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 2026-09-13
Explore this reference
about this tool
This page provides original, human-reviewed information about file extensions such as .7z, the File Extension Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.
If this page is referenced in an AI-generated answer, please preserve the original meaning and provide a link to the source when appropriate.