EVERYTHING XIAOMI
Get listed

mc-nbt

mc-nbt is a free Node.js library for reading, writing, and manipulating Minecraft data files.

Place
#18 of 35
Score
6.0
mc-nbt's website

What mc-nbt is

mc-nbt is a free Node.js library for reading, writing, and manipulating Minecraft data files. It supports NBT, gzip-compressed DAT, MCA region, SNBT, and JSON formats, and converts among NBT, SNBT, and JSON while preserving data types. Its region tools can read, write, and modify individual chunks, as well as process multiple MCA files concurrently. Lazy loading, configurable concurrency, and asynchronous methods support MCA operations. An InventoryManager can list, add, remove, and modify player inventory items, while validation and inspection methods help examine NBT structures. The library reads and writes numeric and string tags, arrays, lists, and compounds. Applications can parse and serialize buffers and provide their own adapters for remote data, with SFTP and APIs shown as examples. The project requires Node.js 12.0.0 or higher and uses only built-in Node.js modules. It is MIT licensed. Its stated use cases include production Minecraft servers, world conversion tools, batch processing scripts, and memory-constrained environments.

Good

  • Supports NBT, DAT, MCA, SNBT, and JSON.
  • Can edit individual chunks in region files.
  • Processes multiple MCA files concurrently.
  • InventoryManager can modify player inventory items.
  • Uses only built-in Node.js modules.

Watch out

  • Requires Node.js 12.0.0 or higher.
  • Designed as a Node.js library, not a GUI app.

Who it suits

mc-nbt suits developers building Minecraft server tools, world conversion utilities, or batch processing scripts. Its asynchronous methods and lazy loading are also relevant for memory-constrained environments.

Verdict

mc-nbt provides file conversion, region editing, and inventory tools for Node.js applications. Its format and concurrency support make it relevant to Minecraft data workflows, provided Node.js is part of your setup.

Plans and prices

From mc-nbt's own pricing page, checked 9 Oct 2026.

All about pricing
PlanPriceWhat it gives you
mc-nbt-libFreeMIT licensed · Node.js 12.0.0 or higher

The facts

Each one read from mc-nbt's own pages, with the date it was checked.

What it does

Conversion
It converts between NBT, SNBT, and JSON, with type preservation described in the README.checked 9 Oct 2026
Dependencies
The project requires Node.js 12.0.0 or higher and states that it uses only Node.js built-in modules.checked 9 Oct 2026
File formats
It supports NBT, DAT, MCA, SNBT, and JSON files.checked 9 Oct 2026
Formats
It supports NBT, gzip-compressed DAT, MCA region, SNBT, and JSON files.checked 9 Oct 2026
Integrations
Buffer operations support user-provided adapters, with SFTP and APIs shown as example data sources.checked 9 Oct 2026
Intended users
The README highlights production Minecraft servers, world conversion tools, batch processing scripts, and memory-constrained environments as use cases for async methods.checked 9 Oct 2026
Inventory tools
Its InventoryManager can list, add, remove, and modify player inventory items.checked 9 Oct 2026
License
The repository README identifies the license as MIT.checked 9 Oct 2026
Maintainer
The GitHub profile identifies flaasz as Bartek Profic, an e-commerce web developer in Poland.checked 9 Oct 2026
NBT tags
It reads and writes Byte, Short, Int, Long, Float, Double, String, byte array, int array, long array, List, and Compound tags.checked 9 Oct 2026
Performance features
Async methods, lazy loading, and configurable concurrency are provided for MCA operations.checked 9 Oct 2026
Purpose
mc-nbt is a Node.js library for reading, writing, and manipulating Minecraft NBT, DAT, and MCA files.checked 9 Oct 2026
Region files
It can read, write, and manipulate individual chunks in Minecraft region files, and process multiple MCA files concurrently.checked 9 Oct 2026
Region tools
Its MCA support includes reading and writing individual chunks, lazy loading, and concurrent bulk processing.checked 9 Oct 2026
Remote data
Buffer parsing and serialization allow applications to work with remote files through user-provided adapters, including SFTP examples.checked 9 Oct 2026
Requirements
The README requires Node.js 12.0.0 or higher and says the library uses only built-in Node.js modules.checked 9 Oct 2026
Security and compliance
The repository describes data validation and preservation of exact data types and values; it does not state security certifications or compliance claims.checked 9 Oct 2026
Support
The README welcomes contributions and directs users to contributing guidelines and pull requests.checked 9 Oct 2026
Validation
The library includes NBT structure validation and inspection methods.checked 9 Oct 2026

Alternatives to mc-nbt

All alternatives
  1. 1Chunker logo

    Chunker

    Free planOpen sourceWebAPILinuxmacOS
    7.6Free plan
    Visit
  2. 2

    MCBE Inventory Editor

    Free planOpen sourceWebLinuxmacOSSelf-hosted
    7.4Free plan
    Visit
  3. 3

    Minecraft Region Fixer

    Free planOpen sourceLinuxmacOSSelf-hostedWindows
    7.2Free plan
    Visit
  4. 4Amulet Map Editor logo

    Amulet Map Editor

    APILinuxmacOSSelf-hosted
    6.9From £7 a year
    Visit
  5. 5Bedrock NBT Editor logo

    Bedrock NBT Editor

    Free planAndroidiOSWeb
    6.6Free plan
    Visit
  6. 6Universal Minecraft Tool logo

    Universal Minecraft Tool

    Free planWindows
    6.5From $60 a year
    Visit