lrzsz for Windows

Product summary

lrzsz is a free Windows program that simplifies sending and receiving files over serial links. It provides a compact, easy-to-use interface so users can move data reliably across modem-style transfer protocols without needing advanced configuration.

Supported transfer protocols

• YModem — handles batch transfers and larger files efficiently, useful when moving multiple items in one session.
• ZModem — offers robust resume and error-recovery features for interrupted transfers.
• XModem — a straightforward, widely compatible method for single-file transfers over simple serial connections.

Intended users

This utility suits both beginners who want a simple, no-frills tool and experienced technicians who require dependable serial communication. It’s particularly helpful for anyone who regularly manages file exchanges over COM ports or other serial interfaces.

Key advantages

• Lightweight and focused: minimal interface with the essential features for fast setup and use.
• Reliable transfers: protocols include error checking and interruption handling to reduce failed transfers.
• Versatile applications: works across a variety of serial communication scenarios, from embedded device updates to legacy system maintenance.

Suggested alternative

• scrcpy (free) — recommended for users who need a different approach to device connectivity, especially when working with Android devices and ADB-based workflows.