Convert MP4 to WebM
Free online MP4 to WebM converter — no signup, no watermark
Convert MP4 (MPEG-4 Part 14) files to WebM (WebM (VP8/VP9)) format online for free. Our MP4 to WebM converter runs entirely in your browser — just drag in your file, click convert, and download the result. No software to install, no account required, and your files stay private.
How to convert MP4 to WebM in 4 steps
- 1
Upload your MP4 file
Drag and drop your MP4 file into the converter, or click to browse from your device. We support files up to 2GB.
- 2
Choose WebM as the output format
WebM is pre-selected. Optionally adjust quality, resolution or bitrate if your file needs custom settings.
- 3
Convert MP4 to WebM
Click the convert button. Our converter processes your MP4 file and produces a high-quality WebM output, usually in under a minute.
- 4
Download your WebM file
Once conversion is complete, download your WebM file. Your original MP4 stays untouched and we delete uploaded files within an hour.
Why convert MP4 to WebM?
MP4 is the most widely supported video container format, offering excellent compression with H.264 or H.265 codecs while preserving quality. It works on virtually every device, browser, and platform. WebM is a royalty-free, open video format developed by Google specifically for the web. It uses VP8 or VP9 codecs to deliver high-quality video at small file sizes, making it ideal for HTML5 video playback. Converting from MP4 to WebM is useful when you need html5 web video embedding or want to take advantage of open source and royalty-free.
Top reasons to switch to WebM
- HTML5 web video embedding
- Modern browser-based streaming
- Open-source video projects
MP4 vs WebM: side-by-side
MP4
Pros
- + Universal device and browser support
- + Excellent compression-to-quality ratio
- + Small file sizes
- + Supports subtitles and metadata
Cons
- − Lossy compression by default
- − Can require licensing for some codecs
WebM
Pros
- + Open source and royalty-free
- + Excellent web compression
- + Native support in Chrome, Firefox, Edge
Cons
- − Limited support on iOS and Safari
- − Slower encoding than H.264
- − Less editing software support
MP4 to WebM — Frequently Asked Questions
Is converting MP4 to WebM free?
Is converting MP4 to WebM free?
Yes, our MP4 to WebM converter is 100% free. There are no hidden fees, no signups required, and no watermarks added to your converted WebM files.
Will I lose quality converting MP4 to WebM?
Will I lose quality converting MP4 to WebM?
Our converter uses high-quality encoding settings to preserve as much of the original MP4 quality as possible in the WebM output. For lossless results, choose the "high quality" preset.
How long does MP4 to WebM conversion take?
How long does MP4 to WebM conversion take?
Most MP4 files convert to WebM in 30 seconds to a few minutes, depending on the file size, duration, and your internet connection. Larger files take longer.
Is it safe to upload my MP4 file?
Is it safe to upload my MP4 file?
Yes. All uploads use encrypted HTTPS connections, files are processed on isolated servers, and converted WebM files are automatically deleted within one hour of conversion.
Can I convert MP4 to WebM on mobile?
Can I convert MP4 to WebM on mobile?
Absolutely. Our MP4 to WebM converter works in any modern browser on iPhone, Android, iPad, Windows, macOS and Linux — no app install required.
What's the maximum file size for MP4 to WebM?
What's the maximum file size for MP4 to WebM?
You can convert MP4 files up to 2GB to WebM for free. For larger files, contact us about our batch and premium options.
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