Generally, yes, for single-player games. The DMCA allows for personal file modification. However, distributing "cracked" saves or using an editor to circumvent a paywall (like in a demo) crosses the line.
If you are technically savvy enough to backup your saves and scan your downloads, download a reputable repack from a community-linked source (GitHub or F95zone rpgm save editor repack
Introduction: The Frustration of the Grind For decades, RPG Maker (RPGM) has been the bedrock of indie game development. From heart-wrenching narrative epics to quirky adult visual novels and hardcore dungeon crawlers, the engine powers thousands of games. But let’s be honest: many of these games feature brutal difficulty spikes, repetitive grinding, or tedious resource farming. Generally, yes, for single-player games
For the careless user, it is a potential vector for malware or a way to ruin a carefully balanced game experience. If you are technically savvy enough to backup
Most Japanese RPGM developers (via translation notes) actually condone save editing for accessibility, though they won't officially support it. Problem: "Wrong file size" error. Solution: The game uses a non-standard header. Use the "Hex View" in the repack to delete the first 16 bytes of the save file manually.