Free, in your browser, no signup: files delete themselves within an hour.
One file at a time for now
Batch processing isn't available yet: drop files one by one, or use the Merger to join them.
Converting WMV to MP4 is free: drop your WMV above, hit convert, and download the MP4. Files delete themselves within an hour.
Most WMV to MP4 conversions are wrapper swaps: the pictures stay pictures, they just trade WMV's box for one built for playing everywhere: browsers, phones, TVs, editors, slide decks. If the codec inside your WMV is one MP4 accepts, Flippy keeps quality bit-for-bit identical; if not, it re-encodes once, carefully, at matching quality.
WMV is a time capsule from the Windows XP years: tidy little files with dated manners. It was born in 1999, Microsoft, and its real weak spot is everything Apple, most browsers, and any phone made this decade.
MP4 is the world's default video: the file that plays before anyone has to think about it. A container, most often carrying H.264 or H.265 video with AAC audio. That makes it the right destination when what you need is playing everywhere: browsers, phones, TVs, editors, slide decks.
Drop your WMV file into the flipper above, or click to browse for it.
Check the output format: MP4 is already selected for you.
Hit Convert, give it a moment, then download your new MP4.
| WMV | MP4 | |
|---|---|---|
| Born | 1999, Microsoft | 2001, the MPEG standards group, built on Apple's QuickTime design |
| Type | video · container | video · container |
| Best for | old Windows archives and PowerPoint decks that still insist on it | playing everywhere: browsers, phones, TVs, editors, slide decks |
| Weak spot | everything Apple, most browsers, and any phone made this decade | very little day to day: as a container its quality depends on the codec inside |
| Typical size | small for its era, but modern codecs beat it on both size and quality | roughly 50–100 MB per minute at 1080p, depending on bitrate |
| Plays on | Windows out of the box; everywhere else wants VLC or a converter. | Every browser, phone, TV and editing app worth mentioning. |
Usually not: when the video codec is compatible, Flippy swaps the container without re-encoding, so quality is untouched. If a re-encode is needed, it happens once at matching quality.
Similar, unless a re-encode is involved: then it depends on the codec. MP4 typically runs roughly 50–100 MB per minute at 1080p, depending on bitrate.
Every browser, phone, TV and editing app worth mentioning. That's the usual reason people leave WMV behind: MP4 simply opens in more of the places that matter.
When it's a pure container swap it's nearly instant, since nothing is re-encoded. Full re-encodes take roughly as long as the video plays, often less.