Video Converter
Convert MP4, MOV, MKV, WEBM, AVI, MPEG, and 3GP videos.
How it works
Upload
Select your source file.
Convert
Choose output settings and process the file.
Download
Download the converted file instantly.
About This Tool
The JustConvert Video Converter changes video files between MP4, MOV, WEBM, and AVI using FFmpeg, with input support for MP4, MOV, M4V, MKV, WEBM, AVI, MPEG, MPG, and 3GP. It is built for compatibility problems: a clip that will not play on a phone, a recording an upload portal rejects, or footage that needs a web-friendly container.
Each upload is validated, capped by duration, stripped of unnecessary metadata, and cleaned from the server after processing. Choose your target format and download a video that plays reliably across devices, browsers, and editing apps.
- check_circleConvert to MP4, MOV, WEBM, or AVI
- check_circleAccepts MP4, MOV, MKV, WEBM, AVI, MPEG, and 3GP sources
- check_circleMP4 output for the widest device and platform support
- check_circleWEBM output for lightweight web video
- check_circleFFmpeg validation, duration limits, and automatic cleanup
Frequently Asked Questions
Which video format is most compatible? expand_more
MP4 (H.264) plays on almost every phone, browser, TV, and editor, so it is the safest choice for sharing and uploads.
When should I use WEBM? expand_more
WEBM is great for embedding video directly on a website because it is small and supported by modern browsers.
Is there a limit on video length? expand_more
Yes. To keep processing fast and fair, uploads are capped by size and duration. Trim long videos before converting if needed.