Free Video Format Converter

Convert videos between MP4, WebM, and more.
100% free, runs entirely in your browser.

Click to upload or drag and drop

MP4, WebM, MOV, AVI, MKV (MAX. 500MB)

Your video is processed 100% in your browser. Nothing is uploaded to any server.

A free tool by

How to Convert Video Formats

Click the upload area and select a video file (MP4, WebM, MOV, AVI, or MKV).
Choose your desired output format and quality level.
Click "Convert Video" and download the converted file when ready.

Video Format Comparison

Format	Container	Video Codec	Audio Codec	Best For
MP4	MPEG-4	H.264	AAC	Universal playback
WebM	WebM	VP9	Opus	Web embedding
AVI	AVI	H.264	AAC	Legacy software
MOV	QuickTime	H.264	AAC	Apple ecosystem

When to Use Each Format

MP4: The most widely supported format. Works on virtually every device, browser, and media player. The best default choice for sharing, uploading, and playback.
WebM: Optimized for web use with smaller file sizes at comparable quality. Ideal for embedding videos on websites and supported by all modern browsers.
AVI: A legacy format with broad compatibility in older software. Larger file sizes but useful when working with older editing tools or systems.
MOV: Apple's native video format. Best for macOS and iOS workflows, Final Cut Pro editing, and maintaining high quality in the Apple ecosystem.

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Video Format Converter FAQs

Common questions about converting video formats

Is this converter free?

Yes, completely free with no limits or watermarks. Your videos are processed entirely in your browser using FFmpeg.wasm — nothing is uploaded to any server.

What formats are supported?

You can convert between MP4, WebM, AVI, MOV, and MKV. Upload any of these formats and convert to MP4, WebM, AVI, or MOV as output.

Which format should I choose?

MP4 is the best all-around choice for maximum compatibility across devices and platforms. WebM is ideal for web embedding with smaller file sizes. MOV is preferred for Apple devices and professional editing workflows. AVI is useful for legacy software compatibility.

Will I lose quality during conversion?

Some quality loss is inherent when re-encoding video. Select "High" quality to minimize this. The tool uses H.264 (for MP4, AVI, MOV) and VP9 (for WebM) codecs with configurable CRF values to give you control over the quality-to-size trade-off.

Are my videos uploaded to a server?

No. This tool runs 100% in your browser using FFmpeg.wasm (WebAssembly). Your video files never leave your device, ensuring complete privacy and security.

What is the maximum file size?

The tool accepts videos up to 500MB. Since all processing happens in your browser, larger files may take longer to convert depending on your device's capabilities and available memory.

How long does conversion take?

Conversion time depends on the video length, resolution, and your device's processing power. A typical 1-minute 1080p video takes around 30-90 seconds. Browser-based conversion is slower than native desktop software but requires no installation.

Can I convert MOV to MP4?

Yes. Simply upload your MOV file, select MP4 as the output format, choose your desired quality level, and click "Convert Video." The converted MP4 file will be ready to download.

Does it preserve audio?

Yes, audio is preserved during conversion. The tool uses AAC audio encoding for MP4, AVI, and MOV formats, and Opus for WebM — all at 128kbps for clear, high-quality audio.

What is the difference between MP4 and WebM?

MP4 uses H.264 video and AAC audio codecs with near-universal device support. WebM uses VP9 video and Opus audio codecs, offering better compression for web use but with slightly less device compatibility. MP4 is better for sharing and playback; WebM is better for embedding on websites.

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