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ZS1 File - What is a .zs1 file and how do I open it?

Learn about .ZS1 files and view a list of programs that open them.

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Overview

What is a ZS1 file? A ZS1 file is a save state created by ZSNES, a Super Nintendo Entertainment System (SNES) emulator for Windows and Linux. It stores a snapshot of a game at a specific moment, allowing the player to return to that exact point later. ZS1 files capture the full emulated system state in a binary format, including memory and processor data, so gameplay resumes exactly as it was when saved.

More Information The .zs1 extension indicates that the file belongs to save slot 1. ZSNES supports multiple numbered save slots, typically ranging from .ZS0 through .ZS9 and up to ZS99, depending on configuration. Each slot represents a separate save state for the same game. These files are commonly used by players, speedrunners, and retro gaming enthusiasts who want to save progress at any time, practice specific sections, or experiment without losing in-game progress. NOTE: ZS1 files can be created at almost any point during gameplay through the emulator’s Save State option in the Game menu.

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DeveloperZSNES
Popularity3.3 | 4 Votes

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.ZS1 File Extension

ZSNES Slot 1 Saved State File

DeveloperZSNES
Popularity
3.3  |  4 Votes
 

What is a ZS1 file?

A ZS1 file is a save state created by ZSNES, a Super Nintendo Entertainment System (SNES) emulator for Windows and Linux. It stores a snapshot of a game at a specific moment, allowing the player to return to that exact point later. ZS1 files capture the full emulated system state in a binary format, including memory and processor data, so gameplay resumes exactly as it was when saved.

More Information

The .zs1 extension indicates that the file belongs to save slot 1. ZSNES supports multiple numbered save slots, typically ranging from .ZS0 through .ZS9 and up to ZS99, depending on configuration. Each slot represents a separate save state for the same game. These files are commonly used by players, speedrunners, and retro gaming enthusiasts who want to save progress at any time, practice specific sections, or experiment without losing in-game progress.

NOTE: ZS1 files can be created at almost any point during gameplay through the emulator’s Save State option in the Game menu.

How to open a ZS1 file

You can open ZS1 files with ZSNES . To open a ZS1 file, place it in the appropriate save directory and use the emulator's Load State feature to resume gameplay. Some other SNES emulators may support ZSNES save states, but compatibility is not guaranteed.

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Programs that open ZS1 files

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Category: Game Files

Updated: February 19, 2026

FAQ

What is a ZS1 file?↓
A ZS1 file is a save state created by ZSNES, a Super Nintendo Entertainment System (SNES) emulator for Windows and Linux. It stores a snapshot of a game at a specific moment, allowing the player to return to that exact point later. ZS1 files capture the full emulated system state in a binary format, including memory and processor data, so gameplay resumes exactly as it was when saved.
How do I open a .zs1 file?↓
You can open ZS1 files with ZSNES. To open a ZS1 file, place it in the appropriate save directory and use the emulator's Load State feature to resume gameplay. Some other SNES emulators may support ZSNES save states, but compatibility is not guaranteed.

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