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.
Flippy turns WMA into MP4 for free: upload the WMA above and download it wrapped as MP4, sound untouched.
It sounds backwards, but WMA to MP4 is a real need: plenty of platforms and tools only accept video, so Flippy re-packs your WMA audio inside an MP4 wrapper. Nothing is re-recorded: the sound in your WMA crosses over untouched, and the MP4 that comes out is built for playing everywhere: browsers, phones, TVs, editors, slide decks.
WMA is Windows' old house band: big in the early 2000s, mostly retired now. It was born in 1999, Microsoft, and its real weak spot is the modern world: Apple devices, browsers and most apps have moved on.
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 WMA 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.
| WMA | MP4 | |
|---|---|---|
| Born | 1999, Microsoft | 2001, the MPEG standards group, built on Apple's QuickTime design |
| Type | audio · lossy | video · container |
| Best for | keeping aging Windows Media software and old archives happy | playing everywhere: browsers, phones, TVs, editors, slide decks |
| Weak spot | the modern world: Apple devices, browsers and most apps have moved on | very little day to day: as a container its quality depends on the codec inside |
| Typical size | MP3-ish sizes; the famous 'CD quality at 64 kbps' claim never quite landed | roughly 50–100 MB per minute at 1080p, depending on bitrate |
| Plays on | Windows Media Player and legacy Microsoft software; little else without help. | Every browser, phone, TV and editing app worth mentioning. |
No. Wrapping audio in an MP4 container doesn't touch the sound itself: it's the same stream in a different box.
About the same, plus a sliver of container overhead. The audio stream is unchanged; MP4 just adds a video-shaped envelope.
Every browser, phone, TV and editing app worth mentioning. That's the usual reason people leave WMA behind: MP4 simply opens in more of the places that matter.
It scales with length and resolution: short clips finish in seconds, long HD videos can take a few minutes. Files auto-delete within an hour after.