Video Converter
Convert MP4, MOV, MKV, AVI, WEBM, and more — instantly, right in your browser.
How to convert a video
- 1
Add a video file
Drag & drop or browse — MP4, MOV, MKV, AVI, WEBM, M4V, FLV, MPEG, MPG, TS, or 3GP.
- 2
Pick an output format
Choose MP4, MOV, MKV, AVI, WEBM, or M4V to convert to.
- 3
Convert
A browser-based engine loads once, then re-encodes the video on your device.
- 4
Download
Save the converted video — nothing is sent anywhere.
Why convert video
Different apps, devices, and editors expect different video containers — converting to MP4 keeps files small and universally playable, WEBM suits the web, and MOV/MKV/AVI cover editing and playback software that expects those specific formats.
Good to know
Conversion runs on the same browser-based FFmpeg engine as the other audio and video tools on this site, loading once per session and staying cached afterward. Both the video and audio streams are re-encoded with settings chosen to balance quality and file size for in-browser conversion.
Video Converter FAQ
Is my video uploaded anywhere?
No. Your file is converted entirely in your browser — nothing is sent to a server.
Which formats can I convert to?
MP4, MOV, MKV, AVI, WEBM, or M4V, from any of the 11 supported input formats.
Does converting change the resolution or aspect ratio?
No. The video is re-encoded at its original resolution, so the aspect ratio is preserved exactly — this tool converts format, not dimensions.
Why does the first conversion take longer?
The first time you convert a file, your browser downloads a one-time video conversion engine (a build of FFmpeg compiled for the browser). It's cached after that, so every conversion afterward in the same session starts instantly.
Why does video conversion take a while?
Re-encoding video is far more computationally heavy than audio, and it's running entirely on your device's processor rather than a server's. Larger or longer files take longer — this trades some speed for never sending your file anywhere.
Is it free?
Yes, converting video with this tool is free.