Universal Save Editor
Universal Save Editor is a free browser-based tool for identifying and editing game save files.
What Universal Save Editor is
Universal Save Editor is a free browser-based tool for identifying and editing game save files. It fingerprints a save against known signatures and patterns, then uses a JSON schema to identify the game and define its editable fields. Changes are validated before export, and undo and redo are available. Export patches a copy, recalculates checksums declared by the schema, and re-encrypts files when specified; a “Download Backup Original” option is available. The maker says save files are processed in the browser and never uploaded. The site lists 25 supported games, and the repository bundles 20 standalone community editors that also run client-side. The maker identifies Pokémon Diamond/Pearl and LEGO Batman: Legacy of the Dark Knight as supported real games, while noting that neither schema has been tested against a captured save. The LEGO Batman schema currently covers Studs Collected, not collectible unlock flags. The editor is available on the web and as a self-hosted static site.
Good
- Save files are processed in-browser, not uploaded
- Edits are validated before export
- Undo and redo history is available
- Original-file backup is available
Watch out
- Some listed game schemas lack captured-save testing
- LEGO Batman schema excludes collectible unlock flags
Who it suits
It suits players who want to edit supported game saves in a browser, with validation, undo and redo, and an original-file backup. Check the available schema and its limits for your game before relying on it.
Verdict
Universal Save Editor offers a browser workflow with schema-based identification and safeguards around edits and exports. Game-specific support varies, and the noted schemas have not been tested against captured saves.
The facts
Each one read from Universal Save Editor's own pages, with the date it was checked.
What it does
- Backups
- The maker says a “Download Backup Original” button is always available.checked 4 Oct 2001
- Binary safety
- The maker says binary reads and writes are bounds-checked and raise catchable errors for malformed or adversarial offsets.checked 4 Oct 2001
- Community editors
- The repository bundles 20 standalone game-specific community editors that also run client-side.checked 4 Oct 2001
- Editing safeguards
- Field edits are validated before export, and the editor offers undo and redo history.checked 4 Oct 2001
- Editing workflow
- The editor fingerprints saves, matches a schema, validates edits, patches a copy, recalculates declared checksums, and exports the modified file.checked 4 Oct 2001
- Export and backup
- Export recalculates declared checksums, re-encrypts files when specified by a schema, and provides a backup of the original.checked 4 Oct 2001
- Formats
- The engine supports schema-defined RC4, XOR, AES-CBC, and AES-CTR decryption and encryption.checked 4 Oct 2001
- Hosting
- The maker describes the site as static and says it can be hosted as a static site.checked 4 Oct 2001
- Local processing
- Save files are read and processed in the browser, and the site says they are never uploaded.checked 4 Oct 2001
- Notable limit
- The LEGO Batman schema currently supports the Studs Collected field; collectible unlock flags are not supported by the engine.checked 4 Oct 2001
- Purpose
- Universal Save Editor identifies game save files from known signatures and patterns so users can edit them.checked 4 Oct 2001
- Schema driven
- The editor uses JSON schemas to identify games and describe save fields, and supporting a new game can be done by adding a schema.checked 4 Oct 2001
- Schema validation
- Community schemas are formally validated with cross-reference checks before being used to read file data.checked 4 Oct 2001
- Security
- The maker says community schemas are validated before use and binary reads and writes are bounds-checked.checked 4 Oct 2001
- Support
- The maker directs users with game-support requests or schema questions to contact dislopik on Discord and points contributors to the contribution guide.checked 4 Oct 2001
- Supported count
- The home page says 25 games are supported.checked 4 Oct 2001
- Supported games
- The maker lists Pokémon Diamond/Pearl and LEGO Batman: Legacy of the Dark Knight as supported real games, while noting neither schema has been tested against a captured save file.checked 4 Oct 2001
- Uncertain matches
- When matching confidence is too low or two schemas tie, the editor shows an unknown-format screen with diagnostics instead of choosing a match.checked 4 Oct 2001
Where it runs
- Browser processing
- Save files are read and processed in the browser, and the maker says they are never uploaded.checked 4 Oct 2001
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