Slimvid

Preset · MP4 to WebM · stays on device

Convert MP4 to WebM Online

Make a web-native WebM from an MP4 for HTML5 pages, Chrome recordings and lightweight embeds.

將影片拖放到這裡，或點擊選擇

每個檔案最大 1GB · 支援 MP4、MOV、WebM、MKV、AVI、WMV 等 30 多種格式

選擇多個檔案

在瀏覽器中本機處理，不上傳任何內容。

Settings

Add a video and the settings for this tool appear here.

How it works

  1. 1Drop the .mp4 file.
  2. 2WebM is preselected on this page.
  3. 3Convert and download. Use MP4 instead if you need iPhone playback.

Processed locally in your browser. Nothing is uploaded.

在瀏覽器中本機處理，檔案不會離開你的裝置。最大 1GB——更大的檔案請使用桌面應用程式。

When WebM is the right container

Some sites, Chrome Web Store listings and HTML5 players still want WebM. An MP4 will play in most browsers; WebM can be smaller with VP8/VP9.

If the source is already VP8/VP9, we remux. H.264 MP4 is transcoded into a WebM the browser can record-style play back.

Safari support for WebM is better than it used to be but still spotty. Keep an MP4 around if you need Apple devices.

What you get

Input
MP4
Output
WebM
Safari
Keep MP4 as a fallback

三個步驟

How to convert MP4 to WebM

無需註冊、沒有上傳佇列、沒有水印。一切都在你的裝置上完成。

  1. 1

    放入檔案

    Drop the .mp4 file.

  2. 2

    選擇設定

    WebM is preselected on this page.

  3. 3

    下載

    Convert and download. Use MP4 instead if you need iPhone playback.

Same job, other limits

Related size and platform pages

Convert WebM to MP4 OnlineTurn browser recordings and VP8/VP9 WebM files into MP4 for iPhone, Premiere and chat apps.WebM → MP4Convert MOV to MP4 OnlineTurn iPhone and camera MOV files into an MP4 that actually plays in browsers, Discord and slides.MOV → MP4Convert MKV to MP4 OnlineRemux a downloaded MKV into MP4 so phones, editors and chat apps will play it.MKV → MP4Convert AVI to MP4 OnlineTurn old camera and screen-recorder AVI files into an MP4 that phones and browsers can play.AVI → MP4

繼續探索

相關工具

常見問題

MP4 to WebM FAQ

桌面應用程式

檔案超過 1GB？交給桌面版。

瀏覽器版非常適合日常短片。當你需要處理大型素材或數十個檔案時，桌面應用程式能在你自己的硬體上更快完成。

取得搶先體驗比較網頁版與桌面版
  • 無檔案大小限制——4K、長達一小時的錄影，都能處理
  • 批次佇列：放入資料夾，套用同一組預設集
  • 硬體加速編碼（H.264 / H.265）
  • 完全離線執行，同樣的隱私保障