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Convert MP4 to WebM – Video Optimized for Web

Convert MP4 to WebM for web video and HTML5 compatibility.

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format

Step 3: Convert files

Read Terms of use before using

Step 1: Upload your files

You can also Drag and drop files.

Step 2: Choose format

Step 3: Convert files

Read Terms of use before using

500+ Formats

Lightning Fast

100% Secure

No Sign-up Required

Cloud Processing

Always Free

Need Video for Web Embedding?

WebM is Google's open video format, designed specifically for the web. It offers excellent compression for streaming, works natively in Chrome and Firefox, and is the preferred format for many web applications.

Converting MP4 to WebM gives you web-optimized video that loads faster and streams more efficiently. For HTML5 video, websites, and web apps, WebM is often the ideal choice.

How to Convert MP4 to WebM

Upload your MP4 file – Select your video for web optimization
Confirm WebM output – WebM with VP9 provides efficient web streaming
Download your file – Get your web-ready video

Conversion happens in your browser—no software installation required.

Why Use WebM for Web Video?

Better Compression

VP9 codec (used in WebM) offers 30-50% better compression than H.264 at the same quality. Smaller files mean faster loading and lower bandwidth costs.

Open Format

WebM is royalty-free and open source. No licensing concerns for commercial use, unlike some proprietary video formats.

Browser Native

Chrome, Firefox, Edge, and Opera support WebM natively in HTML5 video. No plugins or fallbacks needed for most users.

Streaming Optimized

WebM was designed for web delivery. It handles adaptive streaming well and works efficiently with CDNs.

WebM Browser Support

Chrome – Full native support (Google developed WebM)
Firefox – Full native support
Edge – Supported in modern Edge (Chromium-based)
Safari – Limited support; may need MP4 fallback
Opera – Full native support

For maximum browser coverage, provide both WebM and MP4 versions with HTML5 video source fallback.

WebM vs MP4 for Web

File size – WebM typically 30-50% smaller at same quality
Compatibility – MP4 works everywhere; WebM needs Safari fallback
Encoding speed – VP9 encoding is slower than H.264
Licensing – WebM is royalty-free; MP4 has complex licensing

Many sites use both: WebM for browsers that support it, MP4 as fallback.

Common Use Cases

Website Background Videos

WebM's efficient compression makes it ideal for autoplay background videos that need to load quickly.

HTML5 Video Players

Custom video players benefit from WebM's streaming efficiency and open format.

Progressive Web Apps

PWAs serving video content can reduce bandwidth costs with WebM's superior compression.

YouTube and Web Platforms

YouTube uses WebM/VP9 internally. Converting to WebM aligns with modern web video practices.

Batch Convert Multiple Videos

Optimizing video for a website? Upload multiple MP4 files and convert them all to WebM. Consistent web-optimized format across all your video content.

Works on Any Device

Convert MP4 to WebM in any browser:

Windows, Mac, Linux, Chromebook
Chrome, Firefox, Safari, Edge
iPhone, iPad, Android

How to convert MP4 to WEBM

Convert MP4 to WebM for web streaming.

1

Upload your MP4 file

Click Upload and select your MP4 file from your device.

2

Confirm WEBM as output

The WEBM format is auto-selected for this page—confirm it (or choose if needed). Lightweight and browser‑friendly.

3

Convert and download

Click Convert Now and download your WEBM file. Test in Chrome and Firefox. Note: Legacy players may not support WebM.

Tip: Publish an MP4 tutorial as WebM for faster loads.

Expert Tips for MP4 to WEBM

Pro Tip

For HTML5 video, specify both WebM and MP4 sources: <video><source src='video.webm' type='video/webm'><source src='video.mp4' type='video/mp4'></video>. Browsers will use their preferred format automatically.

Common Mistake

Using only WebM without MP4 fallback. Safari users won't be able to play the video. Always provide MP4 as a fallback for complete browser coverage.

Best For

Website video optimization, HTML5 video players, web applications, and any scenario where bandwidth efficiency and open licensing matter.

Not Recommended

Don't use WebM exclusively for mobile apps or when you need guaranteed playback. iOS has limited support. Use MP4 for universal compatibility, WebM for web optimization.

Source Format

Learn more about MP4

Target Format

Learn more about WEBM

Frequently asked questions

For web use, WebM offers better compression (smaller files at same quality). For universal playback, MP4 is more compatible. They serve different purposes—WebM for web, MP4 for general use.

Safari has limited WebM support. For full browser coverage, provide both WebM and MP4 using HTML5 video source fallback. Most Safari users will get the MP4 version.

WebM (VP9) is typically 30-50% smaller than MP4 (H.264) at equivalent visual quality. The exact savings depend on content type and encoding settings.

WebM uses VP8 or VP9 for video and Vorbis or Opus for audio. VP9 is the modern standard offering significantly better compression than VP8.

Android plays WebM natively. iOS has limited support—Safari on iOS may not play WebM. For mobile apps, MP4 is safer for cross-platform compatibility.

YouTube uses VP9/WebM for efficient bandwidth use. Better compression means lower delivery costs and faster loading, especially important at YouTube's scale.

Ideally, use both. Serve WebM to browsers that support it for efficiency, with MP4 fallback for Safari and older browsers. HTML5 video supports multiple sources.

Yes. WebM and VP9 are royalty-free and open source. No licensing fees for commercial use, unlike some aspects of H.264/MP4.