Rmmzsave Editor
Created by developer nathan-b, RMSE is a dedicated desktop tool for editing RPG Maker save files. It's built with Node.js and Electron, making it cross-platform and easy to use.
If a game uses a plugin that adds custom data to a save file (for example, a skill point system), RMSE may not display it. In this case, you can use RMSE's "dump raw JSON" function to save the save file's data as a plain .json text file. You can then edit this JSON file with a text editor to modify the plugin's custom values. Once edited, you can load the JSON file back into RMSE and save it as a new .rmmzsave file.
An RMMZSave editor is a software tool or web application designed to read, modify, and rewrite the save file format used by RPG Maker MZ. rmmzsave editor
Before diving into the specifics of the rmmzsave files, it helps to understand their technical foundation. The save system in RPG Maker MZ is built on a well-defined architecture that determines how editors must interact with it.
Search for the switches array. These are usually listed as [null, true, false, false...] . Remember that RPG Maker switches are 1-indexed, so switches[1] is Switch 1 in the game. Created by developer nathan-b, RMSE is a dedicated
The actual data within a .rmmzsave file is a JSON (JavaScript Object Notation) object. This JSON object is then compressed using the , a zlib port for JavaScript, before being saved to the computer's hard drive. Upon loading, the data is decompressed and parsed back into game objects.
RPG Maker MZ save editing enthusiasts Last updated: April 2026 In this case, you can use RMSE's "dump
Works offline; handles large save files instantly; often includes advanced features like batch editing.
Copy your modified JSON text and paste it back into the encoder tool to re-compress it using the same LZString/Base64 algorithm.
Upload your .rmmzsave file to the decompressor. It will output a raw text file formatted in JSON.
Directly editing the save file without a proper encoder can easily lead to corruption. How to Use an RMMZSave Editor