tinyvid.dev

Convert MP4 to WebM

Already have an MP4 but want a smaller file for modern browsers? Convert it to WebM with the efficient VP9 codec and shave bandwidth without visible quality loss. Free up to 200 MB.

tinyvid · converter

Drop your video here

or browse files
MP4 · MOV · AVI · MKV · WebM · GIF|Free up to 200 MB
01About the conversion

Why convert MP4 to WebM?

MP4 with H.264 is the universal video format — it plays everywhere, which is why it's the safe default. But H.264 is an older codec, and for a modern website you can often do better on file size without anyone noticing a difference.

WebM is an open, royalty-free container built around VP9, a newer codec that compresses noticeably tighter than H.264 at the same visual quality. Smaller files mean faster loads, lower CDN bills and better Core Web Vitals for visitors on Chrome, Firefox, Edge and Android.

Converting MP4 to WebM re-encodes the H.264 stream to VP9 inside WebM. TinyVid keeps the quality close while cutting bytes, and gives you embed code that serves the WebM with an MP4 fallback — so modern browsers get the small file and everything else still plays.

02Step by step

How to convert MP4 to WebM

  1. Drop your .mp4 file above or browse — files up to 200 MB are free, no sign-up.
  2. The output is set to VP9 WebM; pick a preset like Standard player or Max compression.
  3. Optional: adjust the Quality slider and resolution in Advanced settings to trade size against detail.
  4. Press Convert and TinyVid transcodes the MP4 to a VP9 WebM.
  5. Copy the embed code — WebM with an MP4 fallback — and paste it into your page.
03FAQ
01How do I convert MP4 to WebM for free?
Upload the .mp4 above and press Convert — files up to 200 MB convert to WebM for free with no account; up to 4 GB is a one-time payment by size.
02Is WebM really smaller than MP4?
Typically yes. VP9 compresses tighter than H.264, so a WebM is often meaningfully smaller than the source MP4 at the same visual quality.
03Will a WebM play in every browser?
VP9 WebM plays in Chrome, Firefox, Edge and Android. For older Safari/iOS, TinyVid's embed includes an MP4 fallback so every visitor gets a playable source.
04Why convert MP4 to WebM at all?
To save bandwidth and speed up your page on modern browsers. Serving WebM with an MP4 fallback gives smaller files where supported and universal playback everywhere else.
05Does MP4 to WebM reduce quality?
Any re-encode is lossy, but VP9 holds detail well, so the difference is usually invisible. Push the Quality slider up in Advanced settings to preserve more.
06Do I need an account to convert MP4 to WebM?
No sign-up for free or one-time paid conversions — everything runs online.