mp4 mkv

Convert MP4 Video to MKV Video Online

Convert MP4 to MKV online for free. Fast, secure file conversion with no registration required.

MP4 vs MKV

MP4 MKV
Full Name MP4 Video MKV Video
Category Video Video
MIME Type video/mp4 video/x-matroska
File Extension .mp4 .mkv
Max Upload 500 MB —

How to Convert MP4 to MKV

  1. Select your MP4 file using the upload area above
  2. Click "Convert to MKV" to start the conversion
  3. Wait for the conversion to complete
  4. Download your MKV file

About MP4 Format

MP4 (MPEG-4 Part 14) is the most widely used video container format. It supports video, audio, subtitles, and metadata with efficient H.264/H.265 compression. The universal format for web video, streaming, and mobile devices.

About MKV Format

MKV (Matroska) is a flexible, open-standard video container that supports unlimited audio tracks, subtitles, and chapter points in a single file. Popular for high-quality video content and media archiving.

Frequently Asked Questions

Upload your MP4 file using the upload area above, then click "Convert to MKV". The conversion starts automatically and you can download the result when it's ready.

Yes, FileCraft's MP4 to MKV converter is completely free with no registration, watermarks, or hidden fees. You can convert as many files as you need.

Yes. Your files are processed securely and automatically deleted from our servers after conversion. We do not store, share, or access your files.

Most video files convert in a few seconds. Larger files may take slightly longer depending on file size and complexity.

You can upload MP4 files up to 500MB for free conversion. For most use cases this is more than sufficient.

Other MP4 Conversions

89 formats
MP4 3G2 MP4 3GP MP4 AAC MP4 AC3 MP4 AI MP4 AIF MP4 AIFF MP4 AMR MP4 APNG MP4 ASF
MP4 3G2 MP4 3GP MP4 AAC MP4 AC3 MP4 AI MP4 AIF MP4 AIFF MP4 AMR MP4 APNG MP4 ASF MP4 AVI MP4 AVIF MP4 BMP MP4 DPX MP4 DTS MP4 DV MP4 EAC3 MP4 EPS MP4 EXR MP4 F4V MP4 FITS MP4 FLAC MP4 FLV MP4 GIF MP4 HDR MP4 HTM MP4 HTML MP4 ICO MP4 J2K MP4 JP2 MP4 JPEG MP4 JPG MP4 JSON MP4 JXL MP4 M2TS MP4 M4A MP4 M4B MP4 M4V MP4 MLP MP4 MOV MP4 MP2 MP4 MP3 MP4 MPEG MP4 MPG MP4 MTS MP4 MXF MP4 OGA MP4 OGG MP4 OGV MP4 OPUS MP4 PAM MP4 PBM MP4 PCX MP4 PDB MP4 PDF MP4 PGM MP4 PNG MP4 PNM MP4 PPM MP4 PS MP4 PSB MP4 PSD MP4 QOI MP4 RA MP4 RM MP4 SGI MP4 SPX MP4 SVG MP4 SVGZ MP4 SWF MP4 TGA MP4 TIF MP4 TIFF MP4 TS MP4 TTA MP4 TXT MP4 VOB MP4 WAV MP4 WBMP MP4 WEBM MP4 WEBP MP4 WMA MP4 WMV MP4 WV MP4 XBM MP4 XML MP4 XPM MP4 Y4M MP4 YAML

Convert to MKV

93 formats
3G2 MKV 3GP MKV AAC MKV AC3 MKV AI MKV AIFF MKV AMF MKV AMR MKV APNG MKV ARW MKV
3G2 MKV 3GP MKV AAC MKV AC3 MKV AI MKV AIFF MKV AMF MKV AMR MKV APNG MKV ARW MKV ASF MKV AVI MKV AVIF MKV BMP MKV CR2 MKV CR3 MKV DNG MKV DPX MKV DTS MKV DV MKV EAC3 MKV EMF MKV EPS MKV EXR MKV F4V MKV FITS MKV FLAC MKV FLV MKV GIF MKV HDR MKV HEIC MKV HEIF MKV ICO MKV J2K MKV JP2 MKV JPEG MKV JPG MKV JXL MKV M4A MKV M4B MKV M4V MKV MKA MKV MLP MKV MOV MKV MP2 MKV MP3 MKV MPEG MKV MPG MKV MXF MKV NEF MKV OGG MKV OPUS MKV ORF MKV PAM MKV PBM MKV PCX MKV PDB MKV PDF MKV PGM MKV PNG MKV PNM MKV PPM MKV PS MKV PSB MKV PSD MKV QOI MKV RAF MKV RAW MKV RM MKV RW2 MKV SGI MKV STL MKV STP MKV SVG MKV SVGZ MKV SWF MKV TGA MKV TIF MKV TIFF MKV TTA MKV TXT MKV WAV MKV WBMP MKV WEBM MKV WEBP MKV WMA MKV WMF MKV WMV MKV WV MKV XBM MKV XCF MKV XPM MKV Y4M MKV