mkbrr

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mkbrr is a tool to create and inspect torrent files.

Usage:
  mkbrr [command]

Available Commands:
  create      Create a new torrent file
  inspect     Inspect a torrent file
  modify      Modify existing torrent files using a preset
  update      Update mkbrr
  version     Print version information
  help        Help about any command

Flags:
  -h, --help   help for mkbrr

Use "mkbrr [command] --help" for more information about a command.

What is mkbrr?

mkbrr (pronounced "make-burr") is a simple yet powerful tool for:

• Creating torrent files
• Inspecting torrent files
• Modifying torrent metadata
• Supports tracker-specific requirements automatically

Why use mkbrr?

• 🚀 Fast: Blazingly fast hashing beating the competition
• 🔧 Simple: Easy to use CLI
• 📦 Portable: Single binary with no dependencies
• 💡 Smart: Will attempt to detect possible missing files when creating torrents for season packs

Quick Start

Install

Pre-built binaries

Download a ready-to-use binary for your platform from the releases page.

Homebrew

brew tap autobrr/mkbrr
brew install mkbrr

Creating a Torrent

# torrents are private by default
mkbrr create path/to/file -t https://example-tracker.com/announce

# public torrent
mkbrr create path/to/file -t https://example-tracker.com/announce --private=false

Table of Contents

• Installation
• Usage
  • Creating Torrents
  • Inspecting Torrents
  • Modifying Torrents
• Advanced Usage
  • Preset Mode
  • Batch Mode
• Tracker-Specific Features
• Incomplete Season Pack Detection
• Performance
• License

Installation

Choose the method that works best for you:

Prebuilt Binaries

Download a ready-to-use binary for your platform from the releases page.

Homebrew (macOS and Linux)

brew tap autobrr/mkbrr
brew install mkbrr

Build from Source

Requirements: See go.mod for Go version.

# Clone the repository
git clone https://github.com/autobrr/mkbrr.git
cd mkbrr

# Install the binary to $GOPATH/bin
make install

# Or install system-wide (requires sudo)
sudo make install    # installs to /usr/local/bin

Go Install

If you have Go installed:

go install github.com/autobrr/mkbrr@latest

# make sure its in your PATH
export PATH="$PATH:$GOPATH/bin"

Usage

Creating Torrents

The basic command structure for creating torrents is:

mkbrr create [path] [flags]

For help:

mkbrr create --help

Basic Examples

# Create a private torrent (default)
mkbrr create path/to/file -t https://example-tracker.com/announce

# Create a public torrent
mkbrr create path/to/file -t https://example-tracker.com/announce --private=false

# Create with a comment
mkbrr create path/to/file -t https://example-tracker.com/announce -c "My awesome content"

# Create with a custom output path
mkbrr create path/to/file -t https://example-tracker.com/announce -o custom-name.torrent

Inspecting Torrents

View detailed information about a torrent:

mkbrr inspect my-torrent.torrent

This shows:

• Name and size
• Piece information and hash
• Tracker URLs
• Creation date
• File list (for multi-file torrents)

Modifying Torrents

Update metadata in existing torrent files without access to the original content:

# Basic usage
mkbrr modify original.torrent --tracker https://new-tracker.com

# Modify multiple torrents
mkbrr modify *.torrent --private=false

# See what would be changed without making actual changes
mkbrr modify original.torrent --tracker https://new-tracker.com --dry-run

Advanced Usage

Preset Mode

Presets save you time by storing commonly used settings. Great for users who create torrents for the same trackers regularly.

See presets example here.

# Uses the ptp-preset (defined in your presets.yaml file)
mkbrr create -P ptp path/to/file

# Override some preset values
mkbrr create -P ptp --source "MySource" path/to/file

Tip

The preset file can be placed in the current directory, ~/.config/mkbrr/, or ~/.mkbrr/. You can also specify a custom location with --preset-file.

Batch Mode

Create multiple torrents at once using a YAML configuration file:

mkbrr create -b batch.yaml

See batch example here.

Tip

Batch mode processes jobs in parallel (up to 4 at once) and shows a summary when complete.

Tracker-Specific Features

mkbrr automatically enforces some requirements for various private trackers so you don't have to:

Piece Length Limits

Different trackers have different requirements:

• HDB, BHD, SuperBits: Max 16 MiB pieces
• Emp, MTV: Max 8 MiB pieces
• GazelleGames: Max 64 MiB pieces

Torrent Size Limits

Some trackers limit the size of the .torrent file itself:

• Anthelion: 250 KiB
• GazelleGames: 1 MB

[!INFO] When creating torrents for these trackers, mkbrr automatically adjusts piece sizes to meet requirements, so you don't have to.

A full overview over tracker-specific limits can be seen in trackers.go

Incomplete Season Pack Detection

If the input is a folder with a name that indicates that its a pack, it will find the highest number and do a count to look for missing files.

mkbrr create ~/Kyles.Original.Sins.S01.1080p.SRC.WEB-DL.DDP5.1.H.264 -t https://tracker.com/announce/1234567

Files being hashed:
  ├─ Kyles.Original.Sins.S01E01.Business.and.Pleasure.1080p.SRC.WEB-DL.DDP5.1.H.264.mkv (3.3 GiB)
  ├─ Kyles.Original.Sins.S01E02.Putting.It.Back.In.1080p.SRC.WEB-DL.DDP5.1.H.264.mkv (3.4 GiB)
  └─ Kyles.Original.Sins.S01E04.Cursor.For.Life.1080p.SRC.WEB-DL.DDP5.1.H.264.mkv (3.3 GiB)


Warning: Possible incomplete season pack detected
  Season number: 1
  Highest episode number found: 4
  Video files: 3

This may be an incomplete season pack. Check files before uploading.

Hashing pieces... [3220.23 MB/s] 100% [========================================]

Wrote title.torrent (elapsed 3.22s)

Performance

mkbrr is optimized for speed, and outperforms other popular tools. We will post some benchmarks later on.

License

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

See LICENSE for the full license text.