.GGZ File Extension

NeptunJS Saved Game

Developer Urbain Jean Joseph Le Verrier
2.0  |  1 Vote
Category Game Files
Format Binary

What is a GGZ file?

A GGZ file contains a saved game state created by NeptunJS, an online, JavaScipt-based video game console emulator. It is used to resume a saved game on NeptunJS.xyz or another website that uses the NeptunJS emulator.

More Information

NeptunJS is an online video game console emulator that integrates with other emulation software, to provide a multiplatform emulator. The emulator has its own website at NeptunJS.xyz, and it is integrated into other websites, such as RetroGames.cz and MyEmulator.online.

When a player presses the Download save state button while playing a game in NeptunJS, the game produces a GGZ file. This file contains a record of the player's in-progress game.

How to open a GGZ file

GGZ files are emulator-specific, meaning you can open a GGZ file only while using the emulator that created the file. The easiest way to open a GGZ file is to visit NeptunJS.xyz and navigate to the webpage used to play the video game from which your GGZ file was created. Begin playing the game, and then click the Load state button. Then, navigate to and open your GGZ file.

Can I use a GGZ file in non-NeptunJS emulators?

GGZ files are .GZ archives that contain a save state file and a .PNG preview image. If you decompress your GGZ file, you can use the save state file it contains to resume your game in a supported emulator. For example, if your GGZ file contains an .N64 file, you can decompress the GGZ file and then open the N64 file in Nemu64, OpenEmu, or N64oid.

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Programs that open GGZ files

All Platforms
Rename .ggz to .gz; decompress with Gzip decompression utility
Updated May 6, 2022

Verified by FileInfo.com

The FileInfo.com team has independently researched the NeptunJS Saved Game file format and apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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