MP4 to WEBM Converter — Fast & Free Online
Convert MP4 videos to WebM format for optimized web streaming.
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Supports all major formats
How MP4 to WEBM Conversion Works
The MPEG-4 Part 14 Video format packages H.264 or H.265 video with AAC audio in a container format widely supported across every platform and device. Converting to WEBM produces a video file that packages VP8/VP9 or AV1 video with Vorbis/Opus audio in a royalty-free container designed for web streaming. This conversion changes the file's encoding, compression method, and supported feature set. When the source codecs already match the target container the streams are copied without re-encoding (zero quality loss); otherwise the video is re-encoded at a configurable quality. This makes WEBM the practical choice when the destination system requires it or when the target format offers better compatibility or compression. 1converter runs this conversion on the server: your file is uploaded encrypted over HTTPS, converted using trusted open-source libraries, and the output is held for 24 hours before automatic deletion.
How to Convert MP4 to WEBM
Follow these simple steps to convert your MP4 files to WEBM format in seconds
Step 1
Upload your MP4 video
Step 2
Select WebM as output format
Step 3
Choose quality/bitrate
Step 4
Click "Convert"
Step 5
Download your WebM video
Average conversion time: Less than 2 minutes
Visual Conversion Preview
Source file
Converting...
Output file
This visualization shows the typical conversion process from MP4 to WEBM format, including expected size reduction and quality retention.
Choose Your Conversion Quality
Select the perfect balance between quality and file size for your MP4 to WEBM conversion
Low Quality
Smallest file, basic quality
Medium Quality
Balanced size and quality
High Quality
Larger file, great quality
Maximum Quality
Largest file, best possible quality
tips_and_updatesQuality Selection Tips
When to use Low/Medium:
- •Web uploads and social media sharing
- •Email attachments with size limits
- •Quick previews and thumbnails
When to use High/Maximum:
- •Professional printing and publishing
- •Archive and long-term storage
- •When quality is more important than size
Video Tip: Medium quality is ideal for web streaming. Use High or Maximum for videos you plan to edit further or archive.
Why Convert MP4 to WEBM?
Discover the advantages of converting your MP4 files to WEBM format
Smaller file size
20-30% smaller
Web optimized
HTML5 standard
Better streaming
Adaptive bitrate
Open source
No licensing fees
High quality
VP9 codec
Additional Features
Popular Use Cases
See how professionals use our MP4 to WEBM converter in real-world scenarios
Website video
Convert MP4 to WEBM for this purpose quickly and easily.
HTML5 video players
Convert MP4 to WEBM for this purpose quickly and easily.
Web streaming
Convert MP4 to WEBM for this purpose quickly and easily.
Bandwidth optimization
Convert MP4 to WEBM for this purpose quickly and easily.
Open-source projects
Convert MP4 to WEBM for this purpose quickly and easily.
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Frequently Asked Questions
Everything you need to know about converting MP4 to WEBM
Still Have Questions?
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