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What are ZSYNC files and how to open them

Are you having problems opening a ZSYNC file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your ZSYNC files.

What is a ZSYNC file?

A .ZSYNC file is a Zsync Meta Data file.

.zsync files contain metadata that is used to transfer large files over the internet efficiently. When a file is being transferred using the zsync tool, a temporary .zsync file is used to identify which parts of the file have already been transferred and which parts need to be transferred. This allows the file transfer to be resumed from where it left off if it is interrupted and also allows for more efficient use of bandwidth by only transferring the parts of the file that have changed.

The .zsync file also contains checksums for each block of the file, which can be used to verify the integrity of the transferred file. In other words, .zsync files help to make file transfers faster, more reliable, and more efficient.

zsync is a Unix/Linux tool and uses the same protocol as the more commonly used rsync.

How to open ZSYNC files

Important: Different programs may use files with the ZSYNC file extension for different purposes, so unless you are sure which format your ZSYNC file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: December 27, 2022

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