Skip to main content
Convert999
格式所有转换器比较使用场景ToolsBlog
转换器
Convert999

支持400多种格式的免费在线文件转换器。快速、安全、私密。

产品

  • 所有转换器
  • 格式
  • 比较
  • 使用场景
  • Tools

资源

  • 关于
  • Blog
  • Security
  • Glossary
  • Statistics
  • Changelog
  • Contact

法律

  • 隐私政策
  • 服务条款

© 2026 Convert999。保留所有权利。

Made with for the web

HomeConvertConvert to WEBM

Convert to WEBM

Convert any file to WebM Video format — free, fast, and private

视频
选择文件

或将文件拖放到此处

最大文件大小：2GB

您的文件在浏览器中本地处理，不会上传到任何服务器。

About WEBM Format

WebM Video (.webm)

WebM is an open-source video format developed by Google, specifically designed for efficient web video delivery. WebM uses the VP8 or VP9 video codec (or the newer AV1) with Vorbis or Opus audio, providing excellent quality at small file sizes. VP9 delivers quality comparable to H.265/HEVC while being royalty-free. WebM is natively supported by all major web browsers (Chrome, Firefox, Safari, Edge) and is the preferred format for YouTube's adaptive streaming. The format supports transparent video (alpha channel), HDR, and 4K+ resolutions. WebM's open-source, royalty-free nature makes it attractive for web developers and content creators who want to avoid licensing fees associated with H.264/H.265.

Convert to WEBM from any format

Choose a source format below to convert to WebM Video

MP4WEBMAVIWEBMMKVWEBMMOVWEBMWMVWEBMFLVWEBMM4VWEBMMPGWEBMMPEGWEBM3GPWEBM3G2WEBMVOBWEBMOGVWEBMTSWEBMM2TSWEBMMTSWEBMSWFWEBMASFWEBMDVWEBMF4VWEBMDIVXWEBMXVIDWEBMRMWEBMRMVBWEBM

Frequently Asked Questions

How do I convert files to WEBM?
Simply upload your file using the converter above, select WEBM as the output format, and click convert. The conversion happens instantly in your browser — no uploads needed.
What file formats can be converted to WEBM?
You can convert 24+ formats to WEBM, including MP4, AVI, MKV, MOV, WMV and more. Browse the full list of supported source formats above.
Is converting to WEBM free?
Yes, Convert999 is 100% free with no limits. Convert as many files to WEBM as you need — no registration, no watermarks, no hidden fees.
Is my data safe when converting to WEBM?
Absolutely. All conversions happen locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

Explore WEBM

WEBM Converter

Convert from WEBM

WEBM Format

About WebM Video

File Tools

Compress, resize, merge

Format Glossary

Learn about formats

Other Popular Conversions

.pdfConvert to PDF.docConvert to DOC.docxConvert to DOCX.odtConvert to ODT.rtfConvert to RTF.txtConvert to TXT.htmlConvert to HTML.htmConvert to HTM.mdConvert to MD.texConvert to TEX