WebM to MP4 Converter
Convert WebM video to an H.264 MP4 file.
Kivrum Tool
Ready to use
Use this tool directly in your browser. No complicated setup required.
Launch ToolDrop your media file here
or choose a file from your device
MP4, MOV, AVI, MKV, WebM, MP3, WAV, FLAC, M4A or OGG · up to 500 MB
Automatic file deletion
The original is deleted after conversion. The result is deleted after download or automatically within 30 minutes.
About this tool
Use WebM to MP4 Converter online
Convert a local WebM video to MP4 for broader playback support, with automatic download and temporary-file deletion. The interface runs in your browser and uses a disclosed server-side provider for core processing. It is designed for phones, tablets and desktop computers.
How to use it
- 1Drag and drop a supported file or select it from your phone or computer.
- 2Confirm the output format and choose 128, 192, or 320 kbps when creating MP3 audio.
- 3Start the job and follow the upload and FFmpeg conversion progress without leaving the page.
- 4The finished file downloads automatically. Temporary files are then removed from the conversion service.
Main features
- WebM to MP4
- convert WebM
- browser video converter
- MP4 converter
Common use cases
- • Preparing supported local media files
- • Converting audio and video with FFmpeg
- • Managing temporary conversion jobs
Privacy and processing
This tool sends the selected image securely to the configured background-removal provider. Kivrum does not store it. Provider handling is subject to the provider’s own privacy terms; background preview and color composition happen in your browser after processing.
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Help center
Frequently asked questions
Which files can I use with WebM to MP4 Converter?
This page accepts the WEBM input format and converts it to MP4.
Where does the conversion happen?
The browser uploads the local file directly to Kivrum's dedicated media service. FFmpeg performs the conversion in an isolated temporary job directory; the Next.js application does not buffer the media body.
When are my files deleted?
The original is deleted immediately after conversion. The output is deleted after its download finishes, while cancelled, failed, abandoned, and undownloaded jobs are automatically removed within 30 minutes.
Which MP3 qualities are available?
MP3 conversions offer 128 kbps for smaller files, 192 kbps for a balanced result, and 320 kbps for higher audio quality.
Can I use the converter on a phone?
Yes. The workspace supports modern mobile and desktop browsers, although large files can upload more reliably over a stable Wi-Fi connection.
Does Kivrum keep the original filename?
The service uses random job directories and internal filenames. A sanitized version of the original name is used only for the downloaded result.
Why use Kivrum?
Simple, fast and built for everyone
Kivrum tools are designed to help you complete everyday tasks without complicated software or unnecessary steps.
Fast processing
Complete your task quickly with a clean and focused workspace.
Privacy focused
We design our tools with privacy and security in mind.
Reliable experience
Use a consistent interface across all Kivrum tools.
Always improving
New features and tools will continue to be added over time.
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