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 WAV into MP4 for free: upload the WAV above and download it wrapped as MP4, sound untouched.
It sounds backwards, but WAV to MP4 is a real need: plenty of platforms and tools only accept video, so Flippy re-packs your WAV audio inside an MP4 wrapper. Nothing is re-recorded: the sound in your WAV crosses over untouched, and the MP4 that comes out is built for playing everywhere: browsers, phones, TVs, editors, slide decks.
WAV is audio with nothing taken away: every sample intact, every megabyte accounted for. It was born in 1991, Microsoft and IBM, and its real weak spot is being carried around: it refuses to shrink.
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 WAV 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.
| WAV | MP4 | |
|---|---|---|
| Born | 1991, Microsoft and IBM | 2001, the MPEG standards group, built on Apple's QuickTime design |
| Type | audio · uncompressed | video · container |
| Best for | recording, editing and mastering, where every last bit matters | playing everywhere: browsers, phones, TVs, editors, slide decks |
| Weak spot | being carried around: it refuses to shrink | very little day to day: as a container its quality depends on the codec inside |
| Typical size | about 10 MB per minute at CD quality: ten times the size of an MP3 | roughly 50–100 MB per minute at 1080p, depending on bitrate |
| Plays on | Universal on desktops and pro audio gear; clumsy on the mobile web. | 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 WAV 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.