Convert MP4 to WEBM

Free, in your browser, no signup: files delete themselves within an hour.

Drop your file here to upload

Free, no signup
No watermark, ever
Files auto-delete in 1 hour
Nothing to install

Converting MP4 to WEBM is free: drop your MP4 above, hit convert, and download the WEBM. Files delete themselves within an hour.

Most MP4 to WEBM conversions are wrapper swaps: the pictures stay pictures, they just trade MP4's box for one built for embedding on the web without licensing worries. If the codec inside your MP4 is one WEBM accepts, Flippy keeps quality bit-for-bit identical; if not, it re-encodes once, carefully, at matching quality.

Why flip MP4 to WEBM

MP4 is the world's default video: the file that plays before anyone has to think about it. It was born in 2001, the MPEG standards group, built on Apple's QuickTime design, and its real weak spot is very little day to day: as a container its quality depends on the codec inside.

WEBM is video the way browsers like it: open, royalty-free and built to stream. A Matroska-based container restricted to VP8/VP9/AV1 video with Vorbis or Opus audio. That makes it the right destination when what you need is embedding on the web without licensing worries.

How to convert MP4 to WEBM

1
Drop your MP4 file into the flipper above, or click to browse for it.
2
Check the output format: WEBM is already selected for you.
3
Hit Convert, give it a moment, then download your new WEBM.

MP4 vs WEBM, side by side

	MP4	WEBM
Born	2001, the MPEG standards group, built on Apple's QuickTime design	2010, Google, out of its VP8 acquisition
Type	video · container	video · container
Best for	playing everywhere: browsers, phones, TVs, editors, slide decks	embedding on the web without licensing worries
Weak spot	very little day to day: as a container its quality depends on the codec inside	life outside the browser: editors, TVs and Apple devices get picky
Typical size	roughly 50–100 MB per minute at 1080p, depending on bitrate	often smaller than the equivalent MP4: VP9 and AV1 squeeze harder than H.264
Plays on	Every browser, phone, TV and editing app worth mentioning.	Every modern browser; hit-and-miss in editing apps and on Apple hardware.

Questions people ask

Will converting MP4 to WEBM lose quality?

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.

Will the WEBM file be bigger or smaller than my MP4?

Similar, unless a re-encode is involved: then it depends on the codec. WEBM typically runs often smaller than the equivalent MP4: VP9 and AV1 squeeze harder than H.264.

Where will the WEBM file play?

Every modern browser; hit-and-miss in editing apps and on Apple hardware. That's the usual reason people leave MP4 behind: WEBM simply opens in more of the places that matter.

How long does MP4 to WEBM conversion take?

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.

More ways to handle these formats

MP4 conversion Convert WEBM Reduce WEBM file size WEBM Trimmer WEBM to JPG Slow down WEBM Flip MP4