zsync ☆

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Description:
File transfer program

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Networking

Tags: file-transfer rsync bandwidth synchronization networking

Install: brew install zsync

About:
Zsync is a file transfer program that efficiently downloads files from remote servers by only downloading the parts that have changed. It uses the rsync algorithm to minimize bandwidth usage, making it ideal for distributing large files like disk images or software updates. This significantly reduces download times and server load compared to downloading the entire file each time.

Key Features:

Bandwidth efficient transfers using the rsync algorithm
Client-side processing requiring only a standard web server
Supports resuming interrupted downloads
Compatible with standard HTTP/HTTPS servers

Use Cases:

Distributing large software updates or disk images
Mirroring files that change frequently
Reducing bandwidth costs for popular downloads

Alternatives:

rsync – Requires SSH or rsync daemon access on the server, while zsync only needs a standard web server
wget – Downloads entire files regardless of changes, using more bandwidth

Version History

Detected	Version	Rev	Change	Commit
Sep 11, 2025 7:14pm		0	VERSION_BUMP	8ef8292b