SSaveLabLOCAL
No server upload
100% in your browser Free · No account · No timer

Open your save file.
Edit it with confidence.

SaveLab identifies the game and file structure first, then organizes editable values into a clear workspace. Your file never leaves this device.

Drop your save file here

.save, .sav, .dat, .json, .rpgsave, .rmmzsave, .nson, .rvdata2, .sqlite and more

Download dummy file
01 On-device analysis02 Original preserved03 Review every change04 Instant download
The complex parts are automatic

Understand the file. Restore it safely.

We inspect signatures and internal structure instead of trusting the extension alone.

01◎

Detect

File signatures, readable text, and the extension are considered together.

02≋

Unpack

ZIP, Gzip, Zlib, Base64, Hex, and game-specific wrappers are opened in order.

03⌁

Organize

Currency, progress, stats, and inventory values are brought forward first.

04↓

Restore

Every removed layer is applied in reverse so the edited file keeps its original format.

Supported now

Different name? We inspect the contents.

Games reuse extensions in different ways, so SaveLab checks both the name and the actual data.

Structured data

JSON · YAML · XML · MessagePack · CBOR · INI · plain text

Direct editing
Databases

SQLite · .db · table-based saves

Row & column editing
Compression & encoding

ZIP · Gzip · Zlib · Deflate · Base64 · Hex · URL · UTF-16

Automatic restore
Game families

Standard RPG Maker MV/MZ · NaniNovel · RPG Maker XP/VX/Ace editing

Structure-aware
Unknown binary

Carefully suggests strings and 32-bit integers/floats. If encryption is likely, SaveLab stops instead of guessing.

Advanced mode
✓
Round-trip tested

JSON · YAML · XML · MessagePack · CBOR · INI/text · SQLite · ZIP/Gzip/Zlib/Deflate · Base64/Hex/URL/UTF-16 · RPG Maker MV/MZ · NaniNovel NSON · Ruby Marshal

△
Conditional support

Unity/ES3 works only with unencrypted JSON or text, Ruby saves with standard Marshal types, and SQLite with string and number columns in rowid tables.

○
Detection only

Unreal GVAS, Flash SOL, proprietary encryption, signatures, and checksum formats are not structurally editable yet.

Save file handbook

Learn it once. Use it across games.

Detailed guides to finding, backing up, identifying, recovering, and safely editing save files.

01Find Windows save files
Key topicsAppData · Documents · Steam userdata
Detailed practical guideRead guide →
02Backup & restore checklist
Key topicsBackup · Restore · Version history
Detailed practical guideRead guide →
03Recover Steam Cloud conflicts
Key topicsLocal · Cloud · Conflict recovery
Detailed practical guideRead guide →
04Identify save file formats
Key topicsJSON · XML · SQLite · Binary
Detailed practical guideRead guide →
05Recover corrupted saves
Key topicsBackup files · Old files · Previous versions
Detailed practical guideRead guide →
Save guides →
⌂
Local-first privacy

Your file opens here, not on our server.

  • ✓

    Never transferredThere is no network upload step.

  • ✓

    Never storedClose the tab and the working data disappears.

  • ✓

    Never timed outNo countdown or paid queue.

  • ✓

    Malicious files blocked firstBefore parsing, we enforce 64MB input and 96MB expanded limits and reject decompression bombs, executables, unsafe XML, and ZIP paths.

Edit saves for personal, offline games only. Online competition, anti-cheat bypasses, and decryption are not supported.