XVID to MKV Converter

Easily convert XVID video to MKV format online

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Settings

The codec to encode the video track. Codec "Without reencoding" copies the video stream from the input file into output without re-encoding if possible.
Set output AVC (H.264) encoding profile. The older the target device, the "lower" profile you should set. More info can be found on the wiki.
Set output AVC (H.264) profile level. Leaving this setting in "Auto" will calculate the correct level and is the best choice in most cases. More info can be found on the wiki.

xvid

Xvid is an open-source video codec that implements the MPEG-4 Part 2 Advanced Simple Profile standard, developed and maintained by volunteer programmers under the GNU GPL license. The project originated in 2001 as a fork of the OpenDivX codebase after DivX, Inc. closed the source of their codec, and the original name is DivX spelled backwards as a nod to this history. Xvid achieved widespread adoption in the early-to-mid 2000s as a free alternative to the commercial DivX codec, offering comparable or sometimes superior compression quality without any licensing costs. The codec excels at compressing full-length video into remarkably small files while preserving good visual quality, using techniques such as adaptive quantization, quarter-pixel motion compensation, global and local motion estimation, and custom quantization matrices. Xvid-encoded video is typically stored in AVI containers, though it can also be wrapped in MKV, MP4, and other formats. The codec gained certification for playback on many standalone DVD players and media devices that supported DivX playback, since both codecs share the underlying MPEG-4 ASP standard. Cross-platform availability covering Windows, Linux, macOS, and other operating systems, combined with a completely free and open-source nature, made Xvid a cornerstone of community-driven video encoding. While H.264 and newer codecs have largely replaced MPEG-4 ASP for new encoding, Xvid remains in use for compatibility with older hardware and in legacy media collections.
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mkv

MKV (Matroska Video) is an open-standard multimedia container format developed by the Matroska project, which announced the format in December 2002. Named after the Russian matryoshka nesting dolls, the format is built on the Extensible Binary Meta Language (EBML), a simplified binary variant of XML that provides a flexible and forward-compatible structure. MKV can hold virtually unlimited numbers of video, audio, and subtitle tracks within a single file, supporting codecs from H.264 and HEVC to VP9 and AV1 for video, and AAC, FLAC, Opus, and DTS for audio. A standout feature is comprehensive subtitle support, handling formats from simple SRT text to complex ASS styled subtitles and bitmap-based PGS tracks from Blu-ray discs. MKV also supports chapter markers, attachments (such as fonts needed for styled subtitles), and tagging metadata, making it one of the most feature-rich containers available. The open specification ensures that any developer can implement MKV reading and writing without licensing fees, which has driven widespread adoption across media players, streaming tools, and encoding software. The ability to encapsulate virtually any codec combination in a single, well-organized file has made MKV the preferred container for high-quality video distribution, archival, and personal media libraries.
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XVID to MKV Online

Transform your XVID content into MKV directly in the browser. No desktop software, no complicated setup.

Privacy Protected

Your uploaded files are erased right after conversion. Converted results are automatically deleted within 24 hours.

Server-Side Processing

All video encoding happens in the cloud. No CPU strain on your computer, no software downloads needed.

How to convert XVID to MKV

1

Select or drag&drop XVID video to convert it to the MKV format from your computer, iPhone or Android. Moreover, it is possible to choose it from your Google Drive or Dropbox account.

2

Now your video is uploaded and you can start the XVID to MKV conversion. If it is needed, change the output format to one of the 37 video formats supported. After that, you can add more videos for batch conversion.

3

If you want, you can customize such settings as resolution, quality, aspect ratio and others by clicking the gear icon. Apply them to all the video files if necessary and click the button "Convert" to process.

4

Once your video is converted and edited, you can download it to your Mac, PC or another device. If necessary, save the file to your Dropbox or Google Drive account.

About formats

Xvid is an open-source video codec that implements the MPEG-4 Part 2 Advanced Simple Profile standard, developed and maintained by volunteer programmers under the GNU GPL license. The project originated in 2001 as a fork of the OpenDivX codebase after DivX, Inc. closed the source of their codec, and the original name is DivX spelled backwards as a nod to this history. Xvid achieved widespread adoption in the early-to-mid 2000s as a free alternative to the commercial DivX codec, offering comparable or sometimes superior compression quality without any licensing costs. The codec excels at compressing full-length video into remarkably small files while preserving good visual quality, using techniques such as adaptive quantization, quarter-pixel motion compensation, global and local motion estimation, and custom quantization matrices. Xvid-encoded video is typically stored in AVI containers, though it can also be wrapped in MKV, MP4, and other formats. The codec gained certification for playback on many standalone DVD players and media devices that supported DivX playback, since both codecs share the underlying MPEG-4 ASP standard. Cross-platform availability covering Windows, Linux, macOS, and other operating systems, combined with a completely free and open-source nature, made Xvid a cornerstone of community-driven video encoding. While H.264 and newer codecs have largely replaced MPEG-4 ASP for new encoding, Xvid remains in use for compatibility with older hardware and in legacy media collections.
Developer: Xvid Team
Initial release: 2001
MKV (Matroska Video) is an open-standard multimedia container format developed by the Matroska project, which announced the format in December 2002. Named after the Russian matryoshka nesting dolls, the format is built on the Extensible Binary Meta Language (EBML), a simplified binary variant of XML that provides a flexible and forward-compatible structure. MKV can hold virtually unlimited numbers of video, audio, and subtitle tracks within a single file, supporting codecs from H.264 and HEVC to VP9 and AV1 for video, and AAC, FLAC, Opus, and DTS for audio. A standout feature is comprehensive subtitle support, handling formats from simple SRT text to complex ASS styled subtitles and bitmap-based PGS tracks from Blu-ray discs. MKV also supports chapter markers, attachments (such as fonts needed for styled subtitles), and tagging metadata, making it one of the most feature-rich containers available. The open specification ensures that any developer can implement MKV reading and writing without licensing fees, which has driven widespread adoption across media players, streaming tools, and encoding software. The ability to encapsulate virtually any codec combination in a single, well-organized file has made MKV the preferred container for high-quality video distribution, archival, and personal media libraries.
Developer: Matroska
Initial release: December 6, 2002

Frequently Asked Questions

Why convert XVID to MKV?

XVID has outdated compression and declining player support. Converting to MKV gives you multiple audio and subtitle track support and makes your content more accessible.

How do I open a MKV file?

For MKV playback, try VLC, MPC-HC, PotPlayer, or Kodi. All of these support the format natively or with minimal setup.

Will I lose quality converting XVID to MKV?

Quality loss is minimal with proper settings. Choose a higher bitrate and matching resolution to keep the output as close to the original as possible.

Are subtitles preserved in the MKV output?

Subtitle handling depends on the container format. Some MKV containers support embedded subtitles — check format details before converting.

How fast is the XVID to MKV conversion?

Speed varies by file size and settings. Most video files convert in under a minute, with larger files taking slightly longer.