Video Converter

Free online video converter. Convert MP4, MKV, MOV, AVI, WebM and extract audio to MP3, WAV formats. 100% browser-based — your files never leave your device.

Drag and drop any video file here to convert

Max file size 1GB. Free, no registration required.

Max file size 1GB. Free, no registration required.

Why FastConvert

Private

Files never leave your device

Fast

Instant browser-based conversion

Free

No registration, no watermarks

Cross-Platform

Works on any device or OS

Frequently Asked Questions

How do I convert video files online for free?
Drag and drop your video files or click "Choose Files" to upload. Pick your target format (MP4, WebM, GIF, or extract audio as MP3/WAV) and click convert. The video conversion runs in your browser — no upload to any server, no signup required, completely free.
What video formats can I convert with FastConvert?
FastConvert supports converting between common video formats including MP4, MKV, MOV, WebM, and AVI. You can also convert videos to GIF or extract audio as MP3 or WAV.
Can I convert multiple videos at once?
Yes. Upload multiple video files in one batch — the converter handles them sequentially. Each video gets its own download link, and you can download all converted files together as a ZIP.
Are my videos uploaded to your servers?
No, your video files never leave your device. FastConvert uses FFmpeg compiled to WebAssembly, processing everything locally in your browser. This is essential for personal videos, gameplay clips, and any content you want to keep private.
How long does video conversion take?
Conversion speed depends on your device's CPU and the video's length and resolution. A short 1080p clip usually converts in seconds, while longer 4K videos may take a few minutes. There's no upload time since processing is local.
What's the maximum video file size I can convert?
You can convert videos up to 1GB. Since the conversion happens in your browser, performance depends on your device's memory and processing power. Most modern computers handle 1080p videos easily.
Can I convert video to GIF?
Yes. Upload an MP4 video file and select GIF as the output format. FastConvert will create an animated GIF — great for sharing short clips on social media or messaging apps.
Does FastConvert work on mobile devices?
Yes. FastConvert runs in any modern browser on iOS or Android. However, video conversion is CPU-intensive, so very long or high-resolution videos may be slow on older phones. For large files, a desktop is recommended.

Looking for audio conversion?

Try our Audio Converter