Convert MP4 to WEBM
Free online MP4 to WEBM converter.
Choose .mp4 files
or drag and drop — multiple files supported
Max 200 MB for video · 100 MB for other files
Why convert MP4 to WEBM?
Converting MP4 to WEBM allows you to use your files in applications and platforms that require the WEBM format. The conversion is fast, free, and preserves the quality of your original file.
Common use cases
- Using MP4 files in applications that require WEBM
- Sharing files with people who need WEBM format
- Preparing files for platforms that accept WEBM
How to convert MP4 to WEBM
- Click "Choose a .mp4 file" or drag and drop your MP4 file into the upload area.
- Select your preferred quality level — high quality keeps the best fidelity, smaller file prioritizes file size.
- Your file uploads directly to our secure servers and conversion starts automatically.
- Once finished, click "Download" to save your converted WEBM file.
Tips for MP4 to WEBM conversion
- High quality preserves the most detail from your original MP4 file.
- The converted WEBM file can be used on any device or platform that supports the format.
- Files are automatically deleted from our servers within 24 hours for your privacy.
About MP4 and WEBM formats
.MP4 format
MP4 (MPEG-4 Part 14) is the most widely used video container format. It stores video, audio, subtitles, and metadata in a single file. Compatible with virtually all devices, browsers, and media players.
.WEBM format
WebM is a royalty-free format designed for the web. It uses VP8/VP9 video and Vorbis/Opus audio codecs. Natively supported by Chrome, Firefox, and Edge.
Frequently asked questions
Is MP4 to WEBM conversion free?
Yes, ConvertThis offers free MP4 to WEBM conversion with no signup required. There are no watermarks, no daily limits, and no hidden fees.
How long does MP4 to WEBM conversion take?
Most conversions complete in 2-15 seconds depending on file size. Larger files (over 50 MB) may take up to a minute.
Is my file safe during conversion?
Yes. Files are encrypted during upload using 256-bit SSL, processed on isolated servers, and automatically deleted within 24 hours. We never access, share, or store your files.
Convert MP4 to other formats
Convert other formats to WEBM
Privacy and security
Your files are encrypted during upload using 256-bit SSL and are automatically deleted from our servers within 24 hours. We never share, sell, or access your files. All conversions happen on isolated, ephemeral servers.