M4A to MKV Converter Tool [2025]

• Convert M4A (AAC) files to an MKV container.
• Lossless Audio Wrapping: By default, the audio track is copied directly into the MKV container without any re-encoding, preserving 100% of the original quality.
• Advanced controls:
  • Precise audio trimming with timestamp control
  • Volume adjustment with percentage control
  • Fade in/out effects
  • Audio reverse option
• Fast and secure conversion directly in your browser.
• No file size limits or watermarks.
• No software installation required.

The M4A to MKV Converter Tool is a specialized utility for placing your M4A audio into a Matroska (MKV) video container. This is useful for platforms or devices that expect a video file format, even if you only want to upload audio. The MKV container is highly flexible and can hold the original audio track without any loss of quality.

• Platform Compatibility: Use this tool to upload audio to services that require a video file format.
• Preserve Quality: The audio stream from your M4A is copied directly, not re-compressed, so there is no quality loss (unless you apply filters).
• Flexible Container: MKV is a modern, open-standard container that is highly versatile.