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Free MKV Converter Online

Convert Matroska MKV video files

Convert MKV Files

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Convert MKV to Other Formats

Convert your MKV files to 23 different formats

MKV→MP4MKV→WEBMMKV→MOVMKV→AVIMKV→MP3MKV→FLVMKV→WMVMKV→3GPMKV→MPEGMKV→MPGMKV→TSMKV→OGVMKV→3G2MKV→ASFMKV→M4VMKV→AACMKV→WAVMKV→OGGMKV→FLACMKV→M4AMKV→WMAMKV→AIFFMKV→OPUS

Convert Other Formats to MKV

Convert 17 different formats to MKV

MP4→MKVMOV→MKVWEBM→MKVAVI→MKVM4V→MKVFLV→MKVWMV→MKV3GP→MKV3G2→MKVMPEG→MKVMPG→MKVTS→MKVMTS→MKVM2TS→MKVVOB→MKVOGV→MKVASF→MKV

MKV Converter Features

Why choose our MKV converter

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Convert MKV to

Convert MKV to MP4

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Convert MKV to

Convert MKV to WEBM

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Extract subtitles from

Extract subtitles from MKV

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Select audio tracks

Select audio tracks

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Preserve chapter markers

Preserve chapter markers

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Handle HD and

Handle HD and 4K content

How to Convert MKV Files

Converting MKV files is quick and easy

Upload Your File

Drag and drop your file or click to browse. We support over 300 file formats. 💡 Pro Tip: You can drag and drop multiple files at once!

Choose Output Format

Select your desired output format from our comprehensive list of options.

Convert Instantly

Our powerful servers process your file in seconds with high quality results.

Download Result

Download your converted file immediately. Files are kept for 24 hours.

About MKV Format

MKV MKV is a flexible video container format often used for high-quality video, subtitles, and multi-track media.

New to this format? Learn what a MKV file is, how to open it, and its pros and cons.

MKV Technical Details

  • Full Name: Matroska Video
  • Developer: Matroska.org
  • Compression: Various (H.264, H.265, VP9)

Common MKV Use Cases

  • Converting for device compatibility
  • Extracting subtitles
  • Creating smaller files
  • Converting for streaming

Convert MKV to Any Format

With FreeFast, you can convert MKV files to 23 different formats including MP4, WEBM, MOV, AVI, MP3, FLV, WMV, 3GP and 15 more. Each conversion uses settings for the selected output format, with results depending on the source file and target format.

Convert Any Format to MKV

Need to convert files TO MKV? We support converting from 17 different formats including MP4, MOV, WEBM, AVI, M4V, FLV, WMV, 3GP and 9 more formats.

Why use FreeFast for MKV conversion?

FreeFast is a browser-based MKV converter built for practical file jobs. It focuses on clear conversion paths, visible limits, and useful output without installing extra software:

  • Free daily credits and no watermarks: Start with 10 free daily conversions and download output files without branding.
  • Bulk/batch converter support: Upload and convert multiple MKV files within plan, browser, and file-size limits.
  • No signup to start: Start converting files without creating an account for your first file jobs.
  • Quality controls: Conversion settings are chosen for the selected format pair, with results depending on the source file and output type.
  • Encrypted transfer: Uploads and downloads use HTTPS/TLS, and temporary files are cleared after the processing and deletion window.

FreeFast MKV Converter Specification Table

FeatureSpecification Details
Max Upload File Size1 GB (1,000 MB) per conversion
Privacy and Deletion PolicyConfigured result-retention window
File TransferHTTPS/TLS uploads and downloads
Batch & Bulk ProcessingSupported within plan and browser limits
Compatible Operating SystemsWindows, macOS, Linux, iOS, Android, ChromeOS
Account SignupNo signup required for your first file jobs
Watermarks & Visual EditsNone. Output files are clean and unmodified

End-to-End Privacy & File Safety

Files are handled for the conversion you request. Uploads and downloads use HTTPS/TLS, and temporary files are cleared after the processing and deletion window.

Format comparison notes

When choosing between formats, understanding key attributes helps optimize quality and compatibility:

Strengths of MKV

  • Authoritative standard optimized for high compatibility.
  • Exceptional balance between quality and file footprint.
  • Supported out of the box by modern browsers, editors, and OS.

Quality and compression

While converting files, the processor handles scaling, color spaces, metadata, and bitrates where the selected workflow supports them. Review downloaded files before sharing important work.

FreeFast converter link badge

Add a simple link badge to a help article, intranet page, or workflow checklist when readers need a direct MKV conversion shortcut:

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Other Video Formats

mp4movwebmavim4vflvwmv3gp3g2mpeg

MKV Converter FAQ

MKV is the Matroska multimedia container. It can contain video, audio, subtitles, and chapters in a single file.
MP4 is more widely compatible with devices, TVs, and media players than MKV.
When converting to formats that support subtitles, they can be preserved or burned into the video.
Yes! Our converter lets you choose which audio track to include in the converted file.

Ready to Convert Your MKV Files?

Start with 10 free daily conversions. No signup required for your first file jobs.

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