Freedom251 › Game Save Editors
Universal Save Editor
What Universal Save Editor is
Universal Save Editor is a free save-file editor for games. It fingerprints a file against known signatures and patterns, then uses a matching JSON schema to identify the game and describe fields that can be changed. The editor validates changes, offers undo and redo, and patches a copy of the save. During export, it recalculates checksums declared by the schema, re-encrypts files when the schema specifies it, and provides a download of the original as a backup. The maker says files are read and processed in the browser and are never uploaded. The site is a web app that can also be hosted as a static site, and the home page lists support for 25 games. Its engine handles schema-defined RC4, XOR, AES-CBC, and AES-CTR encryption and decryption. The repository also bundles 20 standalone community editors that run client-side. Pokémon Diamond/Pearl and LEGO Batman: Legacy of the Dark Knight are named as supported games, though neither schema has been tested against a captured save. For LEGO Batman, the schema currently covers Studs Collected; collectible unlock flags are not supported by the engine. If a save match is uncertain or schemas tie, the editor displays an unknown-format screen with diagnostics instead of selecting one.
Who it suits
It suits players who want to edit supported game saves in a browser, with validated changes, undo and redo, and an original-file backup. Developers and community contributors can add game support by creating schemas, and the site can be hosted as a static site.
What it does well
- Processes save files in the browser; the maker says they are never uploaded.
- Validates edits and includes undo and redo history.
- Exports a patched copy with declared checksums recalculated.
- Provides a downloadable backup of the original save.
- Community schemas undergo validation and binary operations are bounds-checked.
- Includes 20 standalone client-side community editors.
What to know first
- The LEGO Batman schema only edits Studs Collected.
- Collectible unlock flags are not supported by the engine.
- The named Pokémon and LEGO Batman schemas have not been tested against captured saves.
Getting started
- Open https://universal.dislopik.com/ in a web browser.
- Use the web version or host the static site yourself.
- Select a save file for the editor to fingerprint and match against a schema.
- Edit the available fields, then export the modified copy.
Verdict
Choose Universal Save Editor if you want browser-based editing for a game with a matching schema, plus validation and an original backup. Look elsewhere if you need LEGO Batman collectible unlock flags, or if your save depends on a schema that has not been tested against a captured file.
Questions
Does Universal Save Editor cost anything?
It is free, with a free plan.
Which platforms can I use?
It runs in a web browser and can be self-hosted as a static site.
How many games are supported?
The home page lists 25 supported games. The repository also bundles 20 standalone community editors.
Are save files uploaded?
The maker says save files are read and processed in the browser and are never uploaded.
Can I edit LEGO Batman: Legacy of the Dark Knight saves?
Its schema currently supports the Studs Collected field. Collectible unlock flags are not supported by the engine, and the schema has not been tested against a captured save.
How can a game be added?
Game support is described by JSON schemas. The maker invites game requests or schema questions through Discord, and users can contribute a schema.
Facts from Universal Save Editor's own pages
- Backups
- The maker says a “Download Backup Original” button is always available. · github.com, 4 Oct 2026
- Binary safety
- The maker says binary reads and writes are bounds-checked and raise catchable errors for malformed or adversarial offsets. · github.com, 4 Oct 2026
- Browser processing
- Save files are read and processed in the browser, and the maker says they are never uploaded. · github.com, 4 Oct 2026
- Community editors
- The repository bundles 20 standalone game-specific community editors that also run client-side. · github.com, 4 Oct 2026
- Editing safeguards
- Field edits are validated before export, and the editor offers undo and redo history. · github.com, 4 Oct 2026
- Editing workflow
- The editor fingerprints saves, matches a schema, validates edits, patches a copy, recalculates declared checksums, and exports the modified file. · github.com, 4 Oct 2026
- Export and backup
- Export recalculates declared checksums, re-encrypts files when specified by a schema, and provides a backup of the original. · github.com, 4 Oct 2026
- Formats
- The engine supports schema-defined RC4, XOR, AES-CBC, and AES-CTR decryption and encryption. · github.com, 4 Oct 2026
- Hosting
- The maker describes the site as static and says it can be hosted as a static site. · github.com, 4 Oct 2026
- Local processing
- Save files are read and processed in the browser, and the site says they are never uploaded. · universal.dislopik.com, 4 Oct 2026
- Notable limit
- The LEGO Batman schema currently supports the Studs Collected field; collectible unlock flags are not supported by the engine. · github.com, 4 Oct 2026
- Purpose
- Universal Save Editor identifies game save files from known signatures and patterns so users can edit them. · universal.dislopik.com, 4 Oct 2026
- 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. · github.com, 4 Oct 2026
- Schema validation
- Community schemas are formally validated with cross-reference checks before being used to read file data. · github.com, 4 Oct 2026
- Security
- The maker says community schemas are validated before use and binary reads and writes are bounds-checked. · github.com, 4 Oct 2026
- Support
- The maker directs users with game-support requests or schema questions to contact dislopik on Discord and points contributors to the contribution guide. · github.com, 4 Oct 2026
- Supported count
- The home page says 25 games are supported. · universal.dislopik.com, 4 Oct 2026
- 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. · github.com, 4 Oct 2026
- 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. · github.com, 4 Oct 2026
Where Universal Save Editor stands on Freedom251
- Game Save Editors#22 of 26