Minecraft Java Edition · Browser tool

Minecraft NBT Editor — Edit World Data Online

Use this free online NBT editor to inspect typed tags, change values, explore region chunks, and download a separate copy. Nothing is uploaded to a server.

Files stay local
  • Runs locally
  • Typed tree editor
  • Original stays untouched
One workbench for your world files
Supported files

One workbench for the files inside your world.

Start with the formats players, map makers, and server owners reach for most often.

.nbt

Structures

Inspect structure blocks, entities, palettes, and metadata.

Tree editor
.schematic

Classic schematics

Review dimensions, block arrays, offsets, and custom tags.

Tree editor
.mca

Anvil regions

See populated chunks on a 32×32 map before opening their NBT.

Region map + tree
.mcr

Legacy regions

Browse older McRegion containers with the same focused workflow.

Region map + tree
How it works

From world file to a clean, editable tree.

The editor follows a three-step browser-local workflow.

01 / OPEN

Choose a file

Drop a supported Minecraft Java Edition file into the compact workbench.

02 / EDIT

Inspect and change

Search nested tags, edit typed values, and open real region chunks.

03 / EXPORT

Download a copy

The browser rebuilds the binary structure and saves a new file locally.

Private by architecture

No world uploads. No hidden storage.

The editor parses and rebuilds NBT data in a browser Web Worker. Closing the tab clears the working session.

Browser-local processingYour file does not need to leave the device.
Transparent file supportThe editor shows the detected container before changes begin.
Non-destructive exportEdits become a separate download instead of overwriting the source.
NBTExplorer guide

Looking for NBTExplorer?

NBTExplorer is a desktop NBT editor for Minecraft files. If you prefer a browser-based workflow without installing software, compare Chunkweave as an independent online alternative.

Read the NBTExplorer guideCompare the NBTExplorer alternative
FAQ

Before you open a world file.

Does this upload my save?

No. The editor reads, validates, edits, and rebuilds files inside a browser Web Worker. Your save never leaves this device.

Which Minecraft edition is supported?

Minecraft Java Edition NBT, Anvil/McRegion containers, and classic schematic files are supported.

Can I use NBTExplorer online?

NBTExplorer itself is a desktop application. If you want an online workflow, Chunkweave is an independent browser-based alternative that processes supported files locally.

Can I undo a value change?

Yes. The editor workspace includes undo and redo controls before you download a copy.

What does “download copy” mean?

The editor re-encodes the modified tag structure into a new local file, leaving the original file untouched.