Step 1: Supply your WMV files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted MKV files.
WMV to MKV Conversion FAQ
What does the WMV to MKV converter do?
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WMV is a legacy container, often poorly supported on modern devices. Converting to MKV rewraps the video with a current codec (H.264 / H.265 / VP9) for broad browser, phone, and TV compatibility.
Will resolution and frame rate be preserved in the MKV?
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Yes. WMV → MKV keeps resolution, frame rate, and aspect ratio unchanged by default. To change them, use the Resize or Speed tool on the result.
Will the WMV play smoothly on modern devices after converting to MKV?
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Yes. Legacy WMV files often fail to play in modern browsers and on iOS / Android. MKV uses widely supported codecs that play natively on phones, tablets, smart TVs, and every modern browser.
Will the converted MKV be a different size than the WMV?
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Modern codecs compress better, so MKV from a legacy WMV is typically 30-60% smaller at equivalent quality. Conversions in the opposite direction can grow the file.
My WMV footage shows comb lines on movement — will that carry into the MKV?
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It will unless you deinterlace, and WMV content very often is interlaced because the format comes from the broadcast and DVD era. Interlaced frames store two half-height fields captured a fiftieth of a second apart; on a progressive-scan phone or monitor that reads as horizontal combing on anything that moves. Turn on the deinterlace option and the encoder weaves the fields into whole progressive frames before writing the MKV. WMV is Windows Media Video, Microsoft’s ASF-based format from the Windows XP era.
Can I add selectable subtitles once the file is MKV?
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Yes. WMV has no usable soft-subtitle track, so subtitles for WMV content had to be burned into the picture or shipped as a separate sidecar file. MKV carries subtitles as their own selectable stream, so after conversion you can attach an SRT track the viewer can switch on, switch off or restyle. MKV is codec-agnostic: H.264, HEVC, VP9 and AV1 video sit happily beside AAC, FLAC, Opus, DTS or Dolby audio in the same file.
Why do so many people keep their libraries in MKV?
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Because it was designed for keeping things rather than for delivering them. An MKV holds an unlimited number of audio tracks, selectable subtitle streams, chapter marks and cover art in one file, which is exactly what a disc rip needs somewhere to put — everything ends up in a single object instead of a folder of loose companions. The trade is playback: very little consumer hardware decodes it natively, so the same file that is ideal on a computer or a media server usually has to be converted again before a television will touch it. MKV is the archival container of choice because it stores unlimited audio tracks, soft subtitles, chapter markers and cover art in one file.
Can the MKV hold more than one audio track?
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Yes, and it is a real upgrade over WMV. MKV treats every audio stream as a first-class track, so an original-language mix, a dub and a director commentary can live in one file with the player switching between them on demand.
Will the text in my WMV screen recording still be readable as MKV?
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It will if you keep the resolution and raise the quality. Screen content is the hardest thing to compress well — large flat areas with hairline-thin text over them — and the default settings on any encoder are tuned for camera footage, where a little smearing is invisible. Scaling a recording down is what actually destroys the text, far more than the codec does, so encode at the captured resolution and let the file be larger than you expected.
Does MKV support chapter markers that WMV did not?
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It does. MKV stores chapters as container metadata, so a long recording can be navigated by section instead of by scrubbing a progress bar. WMV has nowhere to put that information, so if the source shipped with a chapter list it was in a sidecar file — hand that to the converter and it gets written into the MKV.
Is there a file-size limit when converting WMV to MKV?
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Anonymous uploads are capped at a generous default; signed-in free accounts get a higher cap, and Pro accounts have no per-file limit. Browser memory is usually the practical constraint long before our server-side limits kick in.
Can I batch-convert several WMV files to MKV at once?
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Yes. Drop or pick multiple WMV files in one upload — the converter processes them in parallel and returns a ZIP of the MKV results. There is no need to repeat the upload step per file.
