tinyvid.dev

Convert WebM to MP4

WebM is built for the web, but Safari and older devices still stumble on it. Convert it to MP4 for rock-solid playback everywhere, with copy-paste embed code — 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 WebM to MP4?

WebM is an open, royalty-free format created by Google for the web, wrapping VP8/VP9 (or AV1) video and Opus/Vorbis audio. It's efficient and plays well in Chrome, Edge, Firefox and Android — which is why so many tools and screen recorders export it.

The catch is reach. Older versions of Safari and iOS were slow to support WebM, and some smart TVs, embedded browsers and legacy devices still can't play it. If your audience includes older iPhones, or you need the single most compatible file, WebM alone leaves gaps in your video tag.

Converting WebM to MP4 re-encodes the VP9/AV1 stream into H.264 inside MP4 — the safest, most universal combination. TinyVid keeps the file lean, preserves visual quality, and gives you embed code with automatic fallbacks so every browser gets a source it can play.

02Step by step

How to convert WebM to MP4

  1. Drop your .webm file above or browse from disk — up to 200 MB free, no sign-up.
  2. Pick a preset: Standard player for general use, or Hero background for a silent loop.
  3. Optional: in Advanced settings choose H.264 for the widest device support.
  4. Press Convert and TinyVid transcodes the WebM to MP4 online.
  5. Copy the generated embed code and paste it into your page.
03FAQ
01How do I convert WebM to MP4 for free?
Upload the .webm above, choose a preset and press Convert — up to 200 MB converts for free with no account; up to 4 GB is a one-time payment by size.
02Why convert WebM if it already works in Chrome?
WebM is great in Chrome and Firefox, but older Safari/iOS versions and some devices can't play it. MP4 with H.264 is the most universally compatible option for a public web page.
03Does WebM to MP4 make the file bigger?
MP4 with H.264 can be slightly larger than an equivalent VP9 WebM at the same quality, because H.264 is older. TinyVid still compresses hard — choose AV1 in Advanced settings for the smallest MP4.
04Will the MP4 play on iPhone and Safari?
Yes — H.264 in MP4 is the combination iPhone and Safari support best, so your video plays reliably across Apple devices.
05Is there quality loss converting WebM to MP4?
Any re-encode is lossy, but TinyVid tunes for the web so the difference is hard to see. Push the Quality slider up in Advanced settings to keep more detail.
06Do I need an account to convert WebM?
No. Free and one-time paid conversions need no sign-up — everything runs online.