Convert Video
Convert video files between MP4, WebM, MKV, MOV, and AVI formats.
About Convert Video
Convert Video transcodes a video between MP4, WebM, MKV, MOV, and AVI. Use it when a platform rejects your file's container, you need WebM for the web, or an old MOV won't play on a newer device. It runs fully in your browser, so even large clips never leave your computer.
- Category
- media
- Input
- Accepts: video/*.
- Output
- Outputs: video/*.
- Cost
- Free, runs in your browser
- Memory
- high
- Install group
- ffmpeg
Common uses
- Convert a phone MOV to MP4 so it uploads cleanly to a site that rejects QuickTime files
- Produce a WebM version of a clip for smaller, web-native playback
- Repackage an MKV download into MP4 for editing software that won't open Matroska
- Turn an old AVI into MP4 so it plays on modern phones and tablets
- Standardize a set of mixed-container clips to a single format before stitching them together
- Create an MP4 from a screen recording so it embeds in a slide deck
Frequently asked questions
Which video formats are supported?
It accepts any video file and converts among MP4, WebM, MKV, MOV, and AVI containers.
Does it re-encode or just change the container?
Conversion handles the format change so the output plays as the chosen type. Switching containers may involve re-encoding, which can take time on longer clips.
Is my video uploaded to a server?
No. The entire conversion runs locally in your browser; the file never leaves your device.
How big a video can I convert?
There's no hard limit, but because processing happens in-browser it's bounded by your device's memory. Large or long videos run slower and may strain a low-end machine.
Will the audio track survive the conversion?
Yes, the audio is carried through to the output. If you want to drop or replace it, use a dedicated tool afterward.
Keywords
- video
- convert
- mp4
- webm
- mkv
- mov
- avi
- format
- transcode