W
Plex, Jellyfin and media servers
MKV is the container home media servers are happiest indexing, with proper chapter, subtitle and multi-audio support.
ANY FORMAT IN · MKV OUT · NOTHING RE-ENCODED
Any video, converted to MKV.
Drop in MP4, MOV, AVI, WMV, WebM, FLV, 3GP and 5 more — Video to MKV Cyborg rewraps them into Matroska without re-encoding a single frame, so the result is bit-for-bit identical and finishes in seconds. Up to 50 files at once, no install, no watermark, no tracking.
Convert to MKV
Batch · up to 50
Drop video files here or browse
MOV
AVI
MP4
WMV
WebM
+7
12 MKVs ready
Converted
MKV
MKV
MKV
MKV
MKV
MKV
Drop your files, get MKV back. This is the whole app.
4.8 / 5
· 11,240+ paid
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€1 day pass · €6 yearly · €30 lifetime · no ads, ever
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One account unlocks all 78 AppsCyborg tools
One account unlocks all 78 AppsCyborg tools — convert, compress, download and extract, across video, audio, images, PDF and more. See all tools →
How to convert video to MKV — two steps
1
Drop your videos
Up to 50 files at once
2
Download your MKV files
MKV
converted-mkv.zip
12 files · quality-optimised
Why a paid converter is the one worth using
Free converters bury you in ads, cap your batch size, watermark your output and monetise your files. Video to MKV Cyborg is funded by you — so it works for you.
50 files in one batch
Convert up to 50 videos at once instead of one-at-a-time. No queue, no per-file wait.
Anonymous & private
No ad or analytics tracking on what you convert, and your files are never sold or shared for marketing.
Smaller files, no watermark
No watermark, no ads around the download, and no re-encoding — the picture and sound inside your MKV are the exact bytes you uploaded.
Try it for €1
A 24-hour day pass costs €1. No subscription, no auto-renewal — decide later.
START HERE
Day pass
€1
/ 24 hours
Just need a batch converted today? Unlimited conversions for 24 hours. No commitment.
- Unlimited conversions for 24h
- No subscription, no auto-renew
Yearly
€6
/ year
The price of a coffee, once — for a whole year of conversions.
- Unlimited for 365 days
- Best value if you convert often
Lifetime
€30
once
Pay once, own it forever. Every future format and update included.
- One payment, never again
- All future updates included
Every plan unlocks all 78 AppsCyborg tools — no ads, no watermarks, plus a 7-day money-back guarantee.
How €1 compares to “free”
| Video to MKV Cyborg | Free online converter | Browser extension | Desktop app | |
|---|---|---|---|---|
| Batch conversion | Up to 50 | 1–5 | One by one | Some |
| Input formats | 12 | ~5 | MKV only | Varies |
| No watermark | ✓ | Often stamped | ✓ | ✓ |
| No install / no ad tracking | ✓ | Ad-funded | Extension | Install |
| Keeps original quality | ✓ | Some | Some | ✓ |
| Price | from €1 | Free (ad-funded) | Free (data-funded) | €20–60 |
Free video converters exist because ads and your uploaded files pay for them — and they still cap you at a couple of videos, burn a watermark into the output, or quietly re-encode and lose quality. Video to MKV Cyborg starts at €1 for a day, installs nothing, converts up to 50 files at once across 12 input formats, and re-encodes nothing at all. No pop-ups, no ad tracking.
Every video format we convert to MKV
Phone clips, screen recordings, old archives, camera footage — 12 input formats in, one MKV out, none of them re-encoded.
12
input formats
50
files per batch
MKV
opens anywhere
0
ads & watermarks
Phone & camera
MOV, 3GP and M4V
iPhone MOV clips and 3GP phone recordings rewrapped into Matroska. Nothing is re-encoded, so a MOV that took an hour to export converts in seconds.
Windows classics
AVI and WMV
AVI and WMV files from old camcorders, screen recorders and archives. Matroska will hold their original codecs untouched, which is exactly what an archive container should do.
High-quality containers
MKV
MKV in, MKV out is a clean rewrap — useful when a file has a damaged index or was written by software that produced a container other players choke on.
Web formats
WebM and FLV
WebM is already a subset of Matroska, so this one is close to a rename. FLV is the old Flash container: its streams survive the move, and MKV can actually store them.
Legacy & broadcast
MPG and MPEG
MPEG-1 and MPEG-2 files from DVD rips, broadcast captures and old software, moved into a container that modern media servers index properly.
Animation
GIF
Animated GIFs wrapped as MKV. Niche, but Matroska is one of the few containers that will take a GIF stream as-is without converting it to video first.
All 12 inputs: MP4, M4V, MOV, WMV, AVI, MKV, MPG, MPEG, GIF, FLV, 3GP, WEBM, up to 50 files per batch. Matroska accepts essentially any codec, which is why every one of these converts by stream copy — the video and audio are moved across untouched rather than re-encoded.
Converting a specific format to MKV
The exact conversion you came for, and why each one is worth doing.
MOV to MKV
Apple QuickTime Movie
iPhone and QuickTime recordings. MOV is fine on a Mac and awkward everywhere else; MKV keeps the same video and travels better.
AVI to MKV
Audio Video Interleave
Microsoft's 1992 container. It has no proper support for modern subtitles or multiple audio tracks, and its index breaks easily — moving the same streams into Matroska fixes both.
MP4 to MKV
MPEG-4 Part 14
The most common conversion here, and the fastest: MP4 and MKV usually hold the same H.264 or HEVC video, so the streams move across untouched. People do it to add subtitle and audio tracks that MP4 handles poorly.
WMV to MKV
Windows Media Video
Windows Media files that most media servers and players outside Windows refuse to index. MKV holds the identical streams in a container they understand.
WEBM to MKV
WebM
WebM is formally a restricted profile of Matroska, so this is the smallest conversion of the set — the container is relabelled and the VP9 or Opus inside is untouched.
FLV to MKV
Flash Video
The old Flash container. Flash is gone but the video inside is often still fine, and Matroska is one of the few modern containers that will accept it without re-encoding.
3GP to MKV
3GPP Multimedia
The cut-down format older phones recorded to. Small files, poorly supported today, and preserved exactly as they are by the move to MKV.
M4V to MKV
Apple MPEG-4 Video
Apple's variant of MP4, and it converts identically — the extension is the only real difference. DRM-protected M4V files bought from iTunes cannot be converted by any tool.
MPG to MKV
MPEG-1 / MPEG-2 Video
MPEG-1 and MPEG-2 from DVD rips and TV captures. The streams are old but perfectly valid, and Matroska stores them without the seeking problems raw MPEG has.
MPEG to MKV
Moving Picture Experts Group
The same MPEG-1/MPEG-2 video as a .mpg file, written with the longer extension — converted identically.
GIF to MKV
Graphics Interchange Format
An animated GIF moved into Matroska as-is. Unusual, but MKV is permissive enough to store the GIF stream without turning it into video first.
See it in action
A 30-second walkthrough: drop your files, watch them convert, download your MKV files. That’s the whole tool.
Ready to try it? Create your account above.
When MKV is the right container
MKV is the container that holds anything and throws nothing away. Here’s where that matters:
R
Keeping the original quality
Nothing is re-encoded, so an MKV made here is bit-for-bit the same video you started with — unlike converting to MP4 or WebM, which often cannot be.
P
Subtitles and multiple audio tracks
MP4 handles both awkwardly. Matroska was designed for them, which is why it is the standard for anything multilingual.
F
Archiving footage
An open, well-documented container that stores any codec is exactly what you want for something you will still need to open in ten years.
T
Files with a broken index
An AVI or MPG that will not seek properly often plays perfectly once the same streams are rewrapped into MKV.
S
Old archives worth keeping
AVI, WMV and MPG footage moved into a modern container without touching a single frame.
Whatever the source, drop up to 50 files and get MKV files back.
Need a different format — or a different tool?
Need it to play on phones, TVs and upload forms instead? Video to MP4 is the universally-compatible option. Putting video on a web page? Video to WebM. Need it smaller? Compress Video. Starting from a link rather than a file on your disk? Video Cyborg downloads it first.
Common questions
Getting started
What is Video to MKV Cyborg?
Video to MKV Cyborg converts video files — MP4, M4V, MOV, WMV, AVI, MPG, MPEG, GIF, FLV, 3GP and WebM — into Matroska (MKV). Drop your videos in and it hands them back as MKV, up to 50 at a time, with the video and audio copied across rather than re-encoded.
Do I need to install anything?
No. Video to MKV Cyborg runs in your browser — no extension, no desktop software, no permissions. The conversion happens on our servers, so even a phone can convert a large batch without slowing down.
What devices and browsers are supported?
Video to MKV Cyborg works in any modern browser on Windows, macOS, Linux, Android and iOS 12 or later. Because the work happens server-side, a phone or tablet converts just as fast as a desktop.
Why is this better than a browser extension?
Four reasons: there is nothing to install and no browser permissions to grant; you can convert 50 files in one batch instead of one at a time; conversion runs on our servers, so it doesn’t slow your machine down or depend on your hardware; and we don’t sell or share your files, which is how most “free” extensions are funded.
Formats, batches & quality
Which formats can I convert to MKV?
MP4, M4V, MOV, WMV, AVI, MKV, MPG, MPEG, GIF, FLV, 3GP and WEBM — 12 formats in total. MKV is accepted as an input too, which produces a clean rewrap; that is useful for a file with a damaged index or one written by software whose output some players refuse.
What is MKV, and should I use it?
MKV is Matroska, an open container format. It is not a codec: it is the box the video and audio sit in, and it will hold almost any of them, along with multiple audio tracks, subtitles and chapters. Use it for archiving, for anything multilingual, and for home media servers like Plex and Jellyfin, which handle it best. Do not use it as your only copy if the video needs to play on a phone, a smart TV or an upload form — most of those still expect MP4.
Why is MKV conversion so much faster than MP4 or WebM?
Because it does almost no work. Matroska will hold any codec, so every supported input can be stream-copied — the video and audio are moved into the new container byte for byte. Converting to MP4 has to re-encode formats it cannot carry, such as WMV and FLV, and WebM has to re-encode everything because it only accepts VP9 and Opus. Here, a ten-second 1080p file rewraps in well under a second.
How many videos can I convert at once?
Up to 50 files per batch. Drop them all in at once — no queue, no per-file waiting. There’s no limit on how many batches you can run while your pass or plan is active.
Is there a file size limit?
There is no fixed size cap. Large videos simply take longer to upload and process, so use a stable connection for big files.
Will converting lose video quality?
No — and unlike most conversions, that is not a careful claim. Matroska accepts essentially any codec, so the video and audio are copied straight across rather than re-encoded. The result is bit-for-bit identical to your source: same resolution, same frame rate, same bitrate, no generation loss. It is also why conversion takes seconds rather than minutes, even for a large file. Nothing is downscaled and no watermark is added.
How do I get the best quality conversion?
There is nothing to get right. Because the streams are copied rather than re-encoded, the output quality is entirely determined by the file you upload — a better source gives a better MKV, and converting the same file twice changes nothing.
Can I adjust the output settings?
There is nothing to adjust — the conversion copies your existing video and audio into a Matroska container without touching them, so there are no quality or bitrate settings that could apply. If you need a smaller file, run the MKV through Compress Video Cyborg.
Pricing, privacy & limits
How much does it cost?
A €1 day pass gives you 24 hours of unlimited conversions. Yearly (€6) and lifetime (€30) plans are also available (+ VAT). Every plan unlocks all 78 AppsCyborg tools, not just this one.
How long does my download link stay valid?
60 minutes. After that the link expires and the converted files are removed — just re-run the conversion if you need them again.
Do you track or keep my files?
No. We don’t run ad or analytics tracking on what you convert, and your files are never sold or shared for marketing. Uploaded videos are processed only to build your MKV files and are removed once the 60-minute download window closes.
Is there a limit on how often I can convert?
No. While your day pass, yearly or lifetime plan is active you can run as many 50-file batches as you like — there is no monthly quota and no per-conversion charge.
Can I convert MKV back to another format?
Yes, with the matching converter — this one goes to MKV. Video to MP4 Cyborg takes MKV and produces an MP4 for phones, TVs and editors, and Video to WebM Cyborg targets the web. Both are included in your account.
Still have a question?
We usually reply within a day.
Your video as MKV, seconds away.
Create your account and drop up to 50 files — 12 formats in, MKVs out, nothing re-encoded.
Free account
€1 day pass
Anonymous
Creating your account is free — you only pay when you convert
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Continue with Microsoft
or sign up with email
By continuing you agree to our Terms and Privacy Policy.
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