Minecraft Java Save Editor — Edit Inventory, XP, Position & Game Rules

Last verified: 2026-10-01

Save file to edit

%APPDATA%\.minecraft\saves\<World Name>\level.dat

Minecraft: Java Edition saves are NOT plain text — they are gzip-compressed NBT, so a text editor shows only garbled bytes. Each world lives in %APPDATA%\.minecraft\saves\<World Name>\. The three files you edit are: level.dat (world-wide NBT: game rules, world spawn, time/weather, difficulty, and in a single-player world the embedded Player tag with your inventory, XP, health and position); playerdata\<UUID>.dat (the same per-player data, used by LAN/multiplayer worlds); and region\r.X.Z.mca (the chunk/block data in Anvil format). To edit: fully quit Minecraft AND the launcher first (so nothing rewrites the file when you save), back up the whole world folder, then open level.dat in an NBT editor — NBTExplorer (classic) or its maintained fork NBT Studio for raw tags, Universal Minecraft Editor for an inventory/player GUI, or MCA Selector for chunks. Change the tag, save, relaunch. Safest of all is the in-game /data command, which edits live NBT with validation and no external tool. Editing inventory counts, XP or game rules is low-risk; a malformed item tag or a wrong Data Version is what crashes a world on load.

How to edit a Minecraft: Java Edition world on PC. The world folder holds level.dat (gzip NBT) plus playerdata/<UUID>.dat and region/*.mca. Which NBT editors decode it (NBTExplorer, NBT Studio, Universal Minecraft Editor, MCA Selector), which tags are safe to change (inventory, XpLevel, Pos, game rules), and how to avoid a crash-on-load or corrupt chunk.

What you can edit and which tag to change

What it changes	XML tag	Example value	Notes
Inventory items	`Player → Inventory (Slot, id, Count, tag)`	`{Slot:0b, id:"minecraft:diamond", Count:64b}`	Since 1.13 item ids are namespaced strings (minecraft:diamond), not numeric ids. Count is a byte (max 64 for stackables; editors let you push past). A typo'd id or a tag block on an item that doesn't support it can crash the world — copy a known-good item's structure.
Experience level	`Player → XpLevel / XpP / XpTotal`	`XpLevel = 30`	XpLevel is the green number; XpP is the 0.0–1.0 progress bar within the level; XpTotal is lifetime XP. Set XpLevel and leave XpP at 0.0 for a clean result.
Position & dimension	`Player → Pos / Dimension`	`Pos = [0.0d, 80.0d, 0.0d]`	Three doubles: X, Y, Z. Use this to unstuck a player trapped in blocks or fallen out of the world. Dimension is a string (minecraft:overworld / the_nether / the_end).
Health & hunger	`Player → Health / foodLevel`	`Health = 20.0f`	Health is a float, 20.0 = full ten hearts. foodLevel is 0–20. Handy after a save where you logged out dying.
Creative/flight abilities	`Player → abilities (mayfly, flying, instabuild, invulnerable)`	`mayfly = 1b`	Bytes used as booleans (1/0). These are normally driven by game mode; force them only if you understand they can desync from playerGameType.
Game mode	`Player → playerGameType / Data → GameType`	`playerGameType = 1 (Creative)`	0 Survival, 1 Creative, 2 Adventure, 3 Spectator. The world-level Data→GameType in level.dat sets the default; the per-player value overrides it.
Game rules	`Data → GameRules (keepInventory, doDaylightCycle, mobGriefing…)`	`keepInventory = "true"`	Stored as STRING tags ("true"/"false"), not bytes — a common mistake that makes the rule silently ignored. Easier and safer to set with /gamerule in-game.
World spawn & time	`Data → SpawnX/SpawnY/SpawnZ, DayTime`	`DayTime = 1000 (morning)`	DayTime is ticks (0=dawn, 6000=noon, 13000=dusk). SpawnX/Y/Z set the world spawn point for new players and respawn without a bed.

How to edit your Minecraft: Java Edition save by hand

Fully quit Minecraft and close the launcher — the game writes the world on exit and will overwrite your edit otherwise.
Open %APPDATA%\.minecraft\saves\ and copy the whole <World Name> folder somewhere safe as a backup.
Open level.dat in NBTExplorer / NBT Studio (raw tags) or Universal Minecraft Editor (inventory/player GUI). For a multiplayer world edit playerdata\<UUID>.dat instead of the embedded Player tag.
Find the tag (expand Data, then Player for single-player), change the value, and keep the tag TYPE identical (byte vs string vs double) — the file saves as gzip NBT automatically.
Save, relaunch Minecraft, load the world. If it crashes on load, restore the backup and re-edit a single tag at a time to isolate the bad value.

Prefer a save editor instead of raw XML?

These edits are for your own local/single-player worlds. On a server or realm the authoritative data lives server-side, so client-side file edits do nothing and anti-cheat/plugins can kick or roll back a player whose NBT doesn't match server state.

Mistakes that corrupt the save

level.dat is gzip-compressed NBT — opening it in Notepad shows garbage and saving from a text editor destroys the file. Always use an NBT tool.
Item ids are namespaced strings since 1.13 (minecraft:diamond). Old numeric-id tutorials will produce items that delete themselves or crash the chunk.
Game rules are STRING tags ("true"), not byte booleans. Setting them as bytes in an editor leaves the rule off.
Every world stores a DataVersion. Editing a world with a tool built for a newer/older format can corrupt it — match the tool version to your game version.
The in-game /data merge entity @s {...} command is the safest editor: it validates the NBT and never leaves the file half-written.

Not sure where the file is? See the full Minecraft: Java Edition save file location guide (every platform path), or the corrupted-save recovery guide if an edit broke your file.

FAQ

Can I edit a Minecraft Java save without a tool?

Yes — the in-game /data command (e.g. /data merge entity @s {XpLevel:30}) edits player and block-entity NBT live with validation, no external editor needed. You need cheats enabled on the world or operator rights.

Why does my world crash after editing level.dat?

Almost always a wrong tag type (byte where a string belongs, or vice-versa), a bad namespaced item id, or a DataVersion mismatch. Restore your backup and change one tag at a time.

Where is the player data in a single-player world?

Inside level.dat under the Player tag. Multiplayer/LAN worlds instead keep each player in playerdata\<UUID>.dat; the single-player Player tag is then unused.

Which editor is best for inventory?

Universal Minecraft Editor gives a visual inventory/player panel; NBTExplorer or NBT Studio expose every raw tag for precise edits. MCA Selector is for chunk/block region files, not player inventory.

Other games

Need another game or a quick backup? Use the Save Location Finder — pick any game to get its exact save path plus a ready-to-run backup command.