Slimvid

Preset · WebM to MP4 · stays on device

Convert WebM to MP4 Online

Turn browser recordings and VP8/VP9 WebM files into MP4 for iPhone, Premiere and chat apps.

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 .webm file from Chrome or your recorder.
  2. 2Leave MP4 selected.
  3. 3Convert and download a file iPhones and editors can open.

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。

WebM plays in Chrome. Not everywhere else.

Chrome, Meet and a lot of screen recorders save WebM (VP8/VP9/AV1). iPhone, Final Cut and Discord still prefer MP4.

This is almost always a transcode. VP9 inside WebM cannot be remuxed into MP4. The hardware encoder writes H.264.

Audio is usually Opus in WebM; we map it to AAC in the MP4 so Apple devices play sound.

What you get

Input
WebM (VP8 / VP9 / AV1)
Output
H.264 + AAC MP4
Typical source
Browser recordings

三個步驟

How to convert WebM to MP4

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 .webm file from Chrome or your recorder.

  2. 2

    選擇設定

    Leave MP4 selected.

  3. 3

    下載

    Convert and download a file iPhones and editors can open.

Same job, other limits

Related size and platform pages

Convert MP4 to WebM OnlineMake a web-native WebM from an MP4 for HTML5 pages, Chrome recordings and lightweight embeds.MP4 → WebMConvert 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

WebM to MP4 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