MP4 to WebM converter
Convert MP4 files to WebM online. Free, no account needed.
Choose a file or drag it here
MP4, AVI, MOV, FLV, MKV, WebM, 3GP, MPEG, MPG, GIF, WMV, TS (up to 500 MB)
- Input
- MP4 files
- 出力
- WebM
- Limit
- Up to 500 MB
- Price
- Free, no account
Turn an idea into a video
Give Storybook a topic or an article link. It makes an illustrated video with narration and music.
How to convert MP4 to WebM
- 01
Choose your MP4 file
Drop it on the box or pick it from your device. The limit is 500 MB per file.
- 02
Confirm WebM
WebM is already selected in Convert to. Select Convert, and a short security check runs first.
- 03
Download the WebM
Select Download when the conversion finishes. Download links expire after one day.
More in コンバーター
All 33 toolsWhy convert MP4 to WebM?
Convert MP4 video to WebM for software that asks for it.
- Why leave MP4. Choose WebM when your app or upload destination requires that format.
- Why use WebM. WebM suits web playback, embeds, and browser recordings.
- What you get. The WebM output uses VP8 video and Opus audio. Test the result in the browser or player you will use. Keep the original. The converted file can differ in size and metadata, and some apps may still not play it.
- 品質. Converting MP4 to WebM compresses the picture again, which can lower its quality a little. It never adds resolution or detail the MP4 did not have.
- Your rights. Convert only files you own or have permission to use.
MP4 vs WebM
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MP4 to WebM questions
Yes. It is free and needs no account.
Yes. The conversion runs on Sceneform's servers, so your file is uploaded first. Uploads are deleted after processing. Download links expire after one day.
Up to 500 MB. A larger file is rejected before it uploads, with the message "Choose a file under 500 MB."
Converting MP4 to WebM compresses the picture again, which can lower its quality a little. It never adds resolution or detail the MP4 did not have.
No. The converter takes one uploaded file at a time. It does not read links, and it has no bitrate, resolution, trim, crop or batch controls. The WebM output uses VP8 video and Opus audio. Test the result in the browser or player you will use.
The WebM output uses VP8 video and Opus audio. Test the result in the browser or player you will use. Keep the original. The converted file can differ in size and metadata, and some apps may still not play it.
Yes, until you have checked the converted file. Open it in the app where you will use it, and compare its length and its sound or picture with the original.