Change MP4, MOV, WebM and MKV files into the format you need, or make one small enough for a chat app or an email. Everything happens on this device, so there is no upload to wait for and no copy of your video on anyone else's server. It is free.
How to convert a video, step by step
- Add a video or drop it on the page. You can add several at once.
- Choose Convert format, or Compress to a size.
- To convert, pick MP4, WebM, MOV or MKV, and the Largest size: Original, 1080p, 720p or 480p.
- To compress, pick a limit such as 8 MB, 10 MB, 25 MB or 50 MB, or enter your own in MB.
- Press Convert, then Download. Press Stop if you change your mind.
Converting between formats
MP4 is the safest choice: it plays on phones, TVs, editing apps and every major website. WebM suits web pages, MOV is the QuickTime format used by Apple software, and MKV is a flexible container that holds almost anything. When the picture inside your file is already in a form the new format accepts, it is copied across untouched, which is fast and loses no quality. Otherwise it is re-encoded at high quality, and sound that the new format cannot hold is converted to AAC or Opus.
How compressing to a size works
A file's size is its bitrate multiplied by its length. The tool takes your limit, keeps a small safety margin for the file's own structure, sets aside enough for clear sound and gives the rest to the picture. If that leaves too few bits for the current resolution, the video is scaled down, because a sharp 720p clip looks better than a blocky 1080p one. Encoders do not always hit their target exactly, so if the first result is over the limit it is redone once at a lower bitrate. The final size is shown against your limit. The result is an MP4, and smaller videos are never enlarged.
Tips for the best result
Short clips compress far better than long ones, so trim away anything you do not need first. Busy footage with lots of movement needs more data than a talking head. Email services usually allow 25 MB in total, but attachments grow by about a third while they are sent, so for email a limit near 18 MB is safer. Free Discord accounts accept files up to 10 MB.
Who uses it
People sending a video by email or chat, creators converting a phone clip for an editor, teachers sharing lesson recordings, and small businesses preparing a video for a website. To join clips, use merge videos, and to trim or edit, the video editor. To resize for social apps, try the social video resizer.
Private by design
Your browser opens the video, re-encodes it with its own built-in video engine and offers the download straight from memory. Nothing is uploaded, so family videos, client work and screen recordings stay on this device. Very long or high-resolution videos need plenty of memory, so a computer handles bigger files than a phone.
Questions
Will converting lower the quality?
Not always. When the picture can be copied across, nothing is lost. Otherwise it is re-encoded at high quality.
Why is my compressed video a bit smaller than the limit?
The tool aims just under the limit so the file is accepted by services with strict rules.
Can I convert several videos at once?
Yes. Add more than one video and convert them together.