Video Converter: MP4, AVI, MOV, MKV, WebM & More

Convert video between popular formats, make a GIF, extract the audio, cut a clip or shrink it to a size like 10 MB. Runs on your device, so your video is never uploaded.

Choose one or more video files (up to 1 GB each), or drag & drop them here
For WhatsApp, email or form uploads. Quality is set for you.

The first conversion downloads the conversion engine (about 30 MB), then it is cached. Conversion runs on your device, so long or high-resolution videos can take several minutes and use a lot of memory. Phones are slower than computers. For files over a few hundred MB, use desktop software.

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Free online video converter: MP4, AVI, MOV, MKV and more

This video converter changes a video from one format to another right inside your browser. Convert to MP4, MOV, MKV, AVI, WebM, FLV, WMV or MPG, make an animated GIF, or pull the sound out as MP3, M4A or WAV. Your video is never uploaded: the conversion runs on your own device, so private recordings stay private.

How to convert a video

  1. Choose one or more video files, or drag them onto the box.
  2. Pick the format you want in Convert to. A short note explains what each format is good for.
  3. Choose the quality and, if you want a smaller file, a lower resolution such as 720p or 480p.
  4. Press Convert video, wait for the progress bar, then download the new file.

The first conversion downloads the conversion engine (about 30 MB). After that it is cached by your browser and starts faster.

Which format should I choose?

  • MP4: the safe default. Plays on phones, computers, TVs and the web.
  • MOV: the Apple QuickTime container, handy for editing on a Mac.
  • MKV: a flexible container used for high-quality downloads and some media players.
  • AVI: an older format that some TVs, car stereos and older editing tools still need.
  • WebM: made for websites and modern browsers.
  • GIF: a short silent looping picture. Keep clips to a few seconds, or the file gets very large.
  • MP3, M4A, WAV: audio only, for extracting music or speech from a video.

Tips for a good result

  • Start with a short clip. Try a few seconds first to check the format and quality, then convert the full video.
  • Pick the resolution you need. A phone screen does not need 4K. 720p is usually enough for sharing, and the file is much smaller.
  • Keep the tab open. Conversion stops if you close the page or let your phone lock the screen.
  • Close other heavy tabs. Video conversion needs memory, and a busy browser can run out.
  • Keep your original. The converted file is a new copy, and your original video is never changed.

Limits you should know about

Because the work happens in your browser instead of on a powerful server, conversion is slower than desktop software. A short phone clip takes seconds to a few minutes; a long or 4K video can take much longer and may run out of memory. Files up to 1 GB are accepted, but anything over a few hundred megabytes is better handled with desktop software such as HandBrake or VLC. Some very unusual codecs or protected (DRM) files cannot be converted.

Frequently asked questions

Is my video uploaded to a server?

No. The conversion runs in your browser using WebAssembly, so the file stays on your device. Only the conversion engine itself is downloaded.

How do I convert MOV to MP4?

Add your .mov file, choose MP4 in Convert to, keep the quality on Balanced and press Convert video.

How do I convert MKV or AVI to MP4?

The steps are the same: add the file, choose MP4 and convert. MP4 with H.264 video plays on almost every device.

Can I make a video smaller?

Yes. Choose a lower resolution such as 720p or 480p and the Smaller file quality. For email or messaging, MP4 at 720p is usually a good balance.

Can I extract the audio from a video?

Yes. Choose MP3, M4A or WAV in Convert to, and only the sound is saved.

Why is the conversion slow or does it fail on a big file?

Conversion uses your device's processor and memory. Long, high-resolution videos need a lot of both. Try a lower resolution, convert a shorter clip, or use desktop software for very large files.

Is it free, and is there a watermark?

It is free, has no sign-up and adds no watermark.