Test real save files against today's code. Catch dropped, renamed, wrapped, and changed data before an update breaks player progress.Verified working in Unity 2022 and Unity 6.A save can deserialize without an exception and still lose a player's progress. Save Compatibility Lab models your current save types under Unity's real JsonUtility rules, compares them with the schema that shipped, and replays real old saves through today's code before release.What it helps you doDeclare save roots and shipped version numbers.Capture a committed schema snapshot of what players currently have.Detect renamed, removed, wrapped, newly unsupported, or silently dropped fields.Catch Unity serialization traps such as dictionaries, enum changes, deep nesting, and SerializeReference type changes.Keep a corpus of real or representative saves and replay it through current code.Validate each step in an explicit migration ladder.Export deterministic JSON, Markdown, and self-contained HTML reports and gate CI.Use it before patches that touch player data, refactors of save models, serializer-version changes, or a long-lived game's next migration.Version 1 targets Unity JsonUtility-compatible JSON. It does not model Json.NET, binary, or custom serializers, and it never rewrites saves, generates migrations, or edits code. A clean result covers the declared roots, snapshots, corpus, and migrations you supplied.Read the complete documentation.PRODUCT TYPEEditor-only JsonUtility save-schema analysis, corpus replay, migration validation, reporting, and CI tool.REQUIREMENTSUnity 2022.3 or newer.Save data must use Unity JsonUtility-compatible serialization for version 1 analysis.No package dependency, account, service, or network access.KEY FEATURESSave roots and version declarations.Static schema model based on measured Unity serialization rules.Committed snapshots representing shipped save contracts.Detection for silent drops, field removal/rename, type changes, enum changes, dictionaries, nesting limits, and SerializeReference type movement.Real save corpus replay through current code.Ordered migration ladder validation across versions.Deterministic JSON, Markdown, and self-contained HTML reports.Batch mode and CI exit codes.IMPORTANT LIMITSVersion 1 does not model Json.NET, binary, protobuf, encrypted, compressed, or custom serializers.Does not generate migrations, rewrite player saves, or modify source code.Static analysis follows Unity serialization rules but cannot infer application-specific meaning.Coverage depends on declared save roots, representative snapshots, corpus files, and migration steps.Full documentation.AI-assisted image generation was used for the package icon artwork, and AI-assisted drafting was used for marketing copy and documentation formatting. All technical claims were sourced from the package, and the code, functionality, layouts, exports, and final text were manually reviewed and verified.
