// RPG Maker MV/MZ Save Editor Core (Client-Side) class RMMZSaveEditor { constructor(encryptionKey = null) { this.key = encryptionKey; } async decrypt(encryptedBase64, ivBase64) { const keyBuffer = await crypto.subtle.importKey( 'raw', new TextEncoder().encode(this.key), { name: 'AES-CBC' }, false, ['decrypt'] ); const iv = Uint8Array.from(atob(ivBase64), c => c.charCodeAt(0)); const encryptedData = Uint8Array.from(atob(encryptedBase64), c => c.charCodeAt(0));
// Check for encryption flag if (saveObject.encrypted) { // Assume decryption happens here using this.key }
<!DOCTYPE html> <html> <head><title>RPG Maker Save Editor Online</title></head> <body> <input type="file" id="saveUpload" accept=".rmmzsave,.rpgsave" /> <div id="editorPanel" style="display:none"> <label>Gold: <input type="number" id="goldInput" /></label> <button id="downloadBtn">Save Modified File</button> </div> <script src="rmmz-editor.js"></script> </body> </html>
{ "data": { "variables": [0, 0, 0, 100, 0, ...], "party": { "gold": 100 } } } After editing via the online tool:
// Decompress if needed (LZMA) if (saveObject.compressed) { saveObject.data = LZMA.decompress(saveObject.data); }
editVariable(saveObject, variableId, newValue) { // In MV/MZ, variables are stored as array inside data.variables saveObject.data.variables[variableId] = newValue; return saveObject; }
