Convert to MKV

Convert any file to Matroska Video format — free, fast, and private

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About MKV Format

Matroska Video (.mkv)

MKV (Matroska Video) is an open-source, flexible video container format created in 2002. MKV can hold virtually unlimited video, audio, subtitle, and attachment tracks in a single file, making it the most versatile video container available. It supports every major video codec (H.264, H.265, VP9, AV1), audio codec (AAC, FLAC, DTS, TrueHD, Atmos), and subtitle format (SRT, ASS, PGS). MKV is the preferred format for high-quality video collections, Blu-ray rips, and anime with multiple audio and subtitle tracks. It supports chapters, menus, metadata, and attached fonts. While MKV has excellent software support (VLC, MPV, Plex), some hardware devices and smart TVs have limited MKV compatibility. For maximum compatibility, converting MKV to MP4 is recommended.

Convert to MKV from any format

Choose a source format below to convert to Matroska Video

MP4MKV AVIMKV MOVMKV WMVMKV FLVMKV WEBMMKV M4VMKV MPGMKV MPEGMKV 3GPMKV 3G2MKV VOBMKV OGVMKV TSMKV M2TSMKV MTSMKV SWFMKV ASFMKV DVMKV F4VMKV DIVXMKV XVIDMKV RMMKV RMVBMKV

Frequently Asked Questions

How do I convert files to MKV?

Simply upload your file using the converter above, select MKV as the output format, and click convert. The conversion happens instantly in your browser — no uploads needed.

What file formats can be converted to MKV?

You can convert 24+ formats to MKV, including MP4, AVI, MOV, WMV, FLV and more. Browse the full list of supported source formats above.

Is converting to MKV free?

Yes, Convert999 is 100% free with no limits. Convert as many files to MKV as you need — no registration, no watermarks, no hidden fees.

Is my data safe when converting to MKV?

Absolutely. All conversions happen locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

Explore MKV

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