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.

All Video Tools

GIF

MP4 to GIF

Convert MP4 videos to GIF animations

MP4

MKV to MP4

Convert MKV videos to MP4 format

MP4

MOV to MP4

Convert Apple MOV videos to MP4

MP4

WebM to MP4

Convert WebM videos to MP4 format

MP4

GIF to MP4

Convert GIF animations to MP4 video

MP4

AVI to MP4

Convert AVI videos to MP4 format

WEB

MP4 to WebM

Convert MP4 videos to WebM format

Compress Video

Reduce video file size with adjustable quality

GIF

MOV to GIF

Convert MOV videos to GIF animations

AVI

MP4 to AVI

Convert MP4 videos to AVI format

MP4

WMV to MP4

Convert WMV videos to MP4 format

MP4

FLV to MP4

Convert Flash FLV videos to MP4

MP4

TS to MP4

Convert TS video streams to MP4

MOV

MP4 to MOV

Convert MP4 videos to MOV format

MP4

3GP to MP4

Convert 3GP videos to MP4 format

MP4

MPEG to MP4

Convert MPEG videos to MP4 format

MP3

MP4 to MP3

Extract MP3 audio from MP4 videos

WAV

MP4 to WAV

Extract WAV audio from MP4 videos

MP3

MKV to MP3

Extract MP3 audio from MKV videos

MP3

MOV to MP3

Extract MP3 audio from MOV videos

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