WebM to MP4 Converter — Free, No Upload
Convert WebM videos to MP4 in your browser. Files never leave your device, and MP4 downloads are ready without signup or uploads.
Quick answer
Is WebM to MP4 private?
Yes. ConvertifyHub's WebM to MP4 Converter is browser-based, so files never leave your device during conversion. You can convert common video formats such as WebM, MP4, MOV, AVIwithout creating an account, waiting in a server queue, or sending private files to a cloud converter.
Upload your files
Drag and drop files here, or click to browse
Supported File Types
Images
Documents
Audio
Video
Archives
Spreadsheets
Maximum file size: 100MB per file • All processing happens locally • Your files never leave your device
How do I convert WebM to MP4 without uploading?
ConvertifyHub is a free WebM to MP4 converter that keeps videos on your device by processing conversion directly in your browser. WebM is efficient for Chrome, websites, and screen recordings, but MP4 is accepted by more phones, editing apps, messaging platforms, and social upload forms. Converting WebM to MP4 makes clips easier to share on iPhone, Windows, PowerPoint, Instagram, Slack, and older media players. Drag in a WebM file, choose MP4 output, and download a compatible video without creating an account or waiting in a cloud queue. Browser-based conversion is especially useful for private screen recordings, client demos, and unpublished videos you do not want uploaded to a third-party converter.
Browse all formats on our Video Converter.
Frequently Asked Questions
Are WebM files uploaded to ConvertifyHub?
No. WebM to MP4 conversion happens in your browser, so videos stay on your device whenever the browser path allows.
Why convert WebM to MP4?
MP4 has wider support across iPhone, Windows, TVs, editors, and social apps, making it safer when compatibility matters.
Will conversion reduce video quality?
Re-encoding can slightly reduce quality. Use higher quality settings when you need a closer match to the original WebM.