Free Online Video Format Converter
Convert between MP4, WebM, AVI, MOV, and MKV — no uploads, no account needed.
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Drop video here or click to upload
Any common video format accepted
🔒 Processed locally — never uploaded to any server.
Frequently Asked Questions
Which formats are supported?
Input: MP4, MOV, AVI, WebM, MKV, FLV, and more. Output: MP4, WebM, AVI, MOV, MKV.
Which format should I use?
MP4 (H.264) is the most compatible — works on all devices and platforms. WebM is best for the web. MOV is ideal for Apple devices.
Will conversion affect quality?
Conversion always re-encodes the video, which causes a small quality reduction. We use high-quality defaults to minimize this.
Why convert to WebM?
WebM files are significantly smaller than MP4 and are natively supported by Chrome and Firefox, making them ideal for web pages.
Is my file uploaded to a server?
No. All conversion happens locally in your browser using FFmpeg.wasm. Your files stay on your device.