Mkvtoolnix Gui Download

Updated: June 4, 2026 · Full review · Alternatives · Converters

Download the official installer from the MKVToolNix project site to get version 91.0.0, which supports both Windows 10/11 and Linux Ubuntu with full GUI functionality for MKV and WebM container editing.

Getting MKVToolNix GUI Download and Installation

MKVToolNix 91.0.0 is available as a free, open-source tool for Windows and Linux platforms. The GUI version provides a visual interface for creating, editing, and extracting MKV and WebM video containers without command-line knowledge. Windows users can choose between a standard installer or portable version; both 32-bit and 64-bit editions exist, though 64-bit is recommended for modern systems. Linux users typically access it through distribution repositories or by compiling from source.

The official project distributes mkvtoolnix gui download installers directly, with no bundled bloatware or tracking. Windows installers are cryptographically signed, and the entire codebase remains open-source for transparency. Installation takes under two minutes on most systems.

Why Choose MKVToolNix as an MKV Merge Tool

This application functions as a professional-grade MKV editor free of licensing restrictions. Unlike proprietary alternatives, it handles the full workflow: merge videos, extract audio, add subtitles, edit metadata, and manage chapter information within a single interface.

The merge videos feature allows combining multiple MKV, MP4, or AVI files into a single container while preserving H.264, H.265, and HEVC codec streams without re-encoding. Track selection during merging lets you choose which audio and subtitle streams to include, reducing file bloat. Audio track manipulation supports reordering, renaming, and language tagging for each stream. Learn about extracting subtitles and managing subtitle synchronization to fine-tune timing without video modification.

Core Features in the GUI

The interface divides into input files, track selection, and output settings. Right-clicking any track reveals context menus for subtitle synchronization, audio delay adjustment, and codec validation.

Merging and Track Management

Drag input files into the file list. Click the "Tracks, buttons and editions" tab to select which video, audio, and subtitle streams transfer to the output file. This selective approach maintains container efficiency—strip unnecessary dub tracks or subtitle versions to reduce file size. The batch processing capability allows queueing multiple operations without manual intervention between each job.

Adding and Editing Subtitles

The MKV subtitle editor interface accepts SRT, ASS, and native MKV subtitle formats. Load an existing MKV, right-click the subtitle track, and adjust timing or swap subtitle files. Subtitle synchronization controls shift all cues forward or backward by milliseconds or percentage, essential when source files don't match precisely.

Metadata and Chapter Control

Chapter editing lets you define segment start points with names and timestamps. Metadata fields (title, language codes, default track flags) apply per stream, critical for content with multiple audio dubs or regional cuts.

Pro Tip: Use the command-line interface (mkvmerge) for batch processing hundreds of files. Create a simple shell script that loops through directories and merges or remuxes video automatically. The GUI handles one-off jobs efficiently, but scripting saves hours on large libraries.

Safety and Alternatives

Is mkvtoolnix safe to download? Yes—the project maintains GPL licensing with source code publicly auditable on standard repositories. No malware or telemetry exists in official builds.

For audio-only workflows, Fre:ac as a dedicated audio conversion tool handles MP3 and FLAC formats with CD ripping support. If you need broader file conversion beyond video containers, File Converter supporting multiple media formats covers images and documents alongside video.

Downloading and Getting Started

Visit the official MKVToolNix project to retrieve the mkvtoolnix gui download installer matching your architecture. Windows Defender or antivirus software may flag it initially due to the unsigned portable version—this is normal for open-source tools without commercial certificates. The installer version carries digital signatures and requires no additional trust configuration.

After installation, Configure MKVToolNix for Windows-specific workflows to optimize default settings for your typical video container tasks. The mkvtoolnix gui download process completes in seconds, and the tool runs immediately without system restart.

Linux users should verify their distribution's package age—Ubuntu's official repos sometimes lag behind the latest releases. Compiling from source takes fifteen minutes and provides the absolute latest build with any recent bug fixes.