Compress & Convert
WebM 转 MP4 转换器
把 WebM 录制或下载的视频转成 MP4，兼容性更广。
Waiting for media
Processing video...No file selected
Selected files stay on this device. File sizes shown before processing use browser metadata only, such as 1.00 MB units.
Your video is processed locally in your browser and is not uploaded to our servers. Processing starts only when you click the button - nothing happens until then.
使用方法 WebM 转 MP4 转换器
- 1.上传 WebM - 选择您的 WebM 视频。
- 2.选择画质 - 用均衡输出，或自定义分辨率。
- 3.转换 - 在浏览器本地转成 MP4。
- 4.下载 - 预览并保存 MP4 文件。
WebM 转 MP4 转换器 功能
Supported WebM to MP4 Converter Formats
Privacy
Files are handled as local browser objects. BeYourTools does not upload video or audio contents, does not store filenames, and does not send media to third-party processing APIs.
Video Standards & Simple Playback Guide
Working with video requires balancing file size with clear playback. Using WebM to MP4 Converter helps you prepare clean video clips that play smoothly on any phone, tablet, or computer. Whether you need smaller clips for email or fast-loading videos for your website, our tool gets the job done quickly.
Fast Browser Processing
All video slicing, frame capture, and encoding run directly inside your browser. Your computer or phone handles the work locally, so your large video files never upload over the web.
Everyday Compatibility
Your saved clips keep standard screen shapes, true colors, and clean sound. They open immediately in Apple QuickTime, Windows Media Player, Chrome, and Safari without extra plugins.
WebM 转 MP4 转换器 常见问题
为什么要把 WebM 转成 MP4？
MP4 被更多 App、社交平台和老设备接受。
透明度会保留吗？
MP4 一般不保留 Alpha 透明通道。需要透明请用 WebM。
我的视频会被上传到服务器吗？
不会。本工具在您的浏览器本地处理文件，BeYourTools 不会上传、存储视频，也不会把媒体发给处理 API。
Does processing reduce the quality or resolution of my original video?
Trimming, cutting, and frame extraction keep your original video resolution and picture clarity. Our compressor tool lets you choose how much file size to shave off while keeping your picture sharp.
Are my personal videos uploaded to or viewable by anyone else?
No. All video editing happens right in your browser memory. Your files are never sent to our servers or saved anywhere online. Everything stays safe on your own device.