All Converter Pro
在线转换 Video Files
在线免费在 MP4、WebM、MOV、AVI 和 MKV 之间转换视频。修复无法播放的视频,为网页和社交媒体准备视频片段。无需注册。
关于此 视频转换器 工具
The video converter changes a video's format so it plays where you need it: MP4, WebM, MOV, AVI and MKV are supported in both directions. The overwhelmingly safe choice is MP4 (H.264) - it plays on every phone, TV, browser and editing app made in the last decade, which is why "convert to MP4" fixes most "this video won't play" problems, whether the source is an old AVI, an iPhone MOV, or an MKV download. WebM is the alternative when the clip is embedded on a web page. Conversion re-encodes the video, which takes roughly as long as the clip's duration and applies modern efficient compression - old formats often shrink substantially at the same visible quality.
如何使用 视频转换器
- 打开工具并添加您的文件、文字或数值。
- 检查可用选项,例如页面范围、输出格式、质量、密码或语言。
- 开始处理,并在完成前保持浏览器窗口打开。
- 下载结果,如有需要可继续使用相关工具。
实用提示
- 对于扫描的 PDF,支持 OCR 的工具会尽可能自动运行文字识别。
- 对于大文件,在通过邮件分享或上传到门户网站之前,请使用压缩工具。
- 为获得最佳效果,请上传扩展名正确的干净文件,避免使用损坏的文档。
常见问题
Which format should I convert to?
MP4 unless you have a specific reason otherwise. It plays on effectively every device and platform - phones, TVs, browsers, editors, WhatsApp, YouTube. WebM is worth choosing only for videos embedded directly in web pages.
Why won't my video play on my phone or TV?
The container or codec is not supported by the device - common with AVI, MKV and some MOV files. Converting to MP4 (H.264) resolves this in almost every case.
Does converting reduce video quality?
Re-encoding applies compression, but at the settings used the difference is generally not visible. Converting cannot improve quality - a blurry source stays blurry.
How long does conversion take?
Roughly comparable to the video's duration, depending on resolution - a 5-minute clip takes a few minutes. Keep the browser tab open until the download appears.
How large can my video file be?
Uploads up to 512 MB are supported, which covers most phone recordings and downloaded clips. For larger files, trim or compress the video first.
转换器是免费且私密的吗?
Yes. Free with no account, and uploaded videos are stored only temporarily under random names before automatic cleanup.