How to convert a video
- Choose a video or drag it onto the box. It opens in your browser, so even big files load instantly.
- Pick the format you need: MP4 for almost everything, MOV for Apple editing apps, or WebM for websites.
- If Quick is available, use it. It repackages the video without touching the picture, so it's instant and keeps full quality. The most common case is an iPhone MOV to MP4.
- Otherwise choose Re-encode, and optionally pick a smaller size or quality to shrink the file. Re-encoding plays the video through once, so keep the tab open until it finishes.
- Tap Convert and save to download the new file.
Quick or re-encode: which one?
Quick (no re-encode) works between MP4 and MOV, which are close cousins that can hold the same video. It rewrites only the file's label, so it finishes in a second on any size file, and the video and sound are untouched.
Re-encode rebuilds the video. Use it for WebM, for files whose video or sound type doesn't fit the new format, or when you want a smaller file. It takes about as long as the video's running time. MP4 and MOV output need a browser that can record H.264 video, such as Chrome or Edge. Firefox can make WebM.
Supported video formats
The converter opens just about any video file and saves it as MP4, MOV, WebM, MKV, or AVI. Common jobs include MOV to MP4, MTS to MP4, AVI to MP4, WMV to MP4, MOD to MP4, MPG to MP4, VOB to MP4, FLV to MP4, 3GP to MP4, MKV to MP4, and MP4 to WebM. Here's where each format usually comes from:
| Format | Usually comes from | How it converts |
|---|---|---|
| MP4 (.mp4) | Phones, cameras, editing apps, downloads. The most widely supported format. | Browser, instant to MOV |
| MOV (.mov) | iPhones, Macs, QuickTime, many cameras | Instant to MP4 |
| M4V (.m4v) | Apple exports from iMovie, Photos, and Apple TV apps | Instant to MP4 or MOV |
| 3GP, 3G2 (.3gp, .3g2) | Older mobile and flip phones | Instant (H.264) or pro engine |
| WebM (.webm) | Websites, screen recorders, browser recordings | Browser or pro engine |
| MKV (.mkv) | OBS recordings, media servers like Plex, archived video | Pro engine, often without re-encoding |
| AVI (.avi) | Older digital cameras, Windows software, DivX and Xvid files | Pro engine |
| WMV, ASF (.wmv, .asf) | Windows Movie Maker and older Windows PCs | Pro engine |
| FLV, F4V (.flv, .f4v) | Flash video from older websites and stream recordings | Pro engine |
| MTS, M2TS (.mts, .m2ts) | AVCHD camcorders from Sony, Panasonic, and Canon | Pro engine, keeps the original picture |
| TS (.ts) | TV recorders, satellite boxes, and live stream captures | Pro engine, often keeps the picture |
| MOD, TOD (.mod, .tod) | JVC Everio, Panasonic, and Canon camcorders | Pro engine, with the widescreen fix |
| MPG, MPEG, M2V (.mpg, .mpeg, .m2v) | DVDs, older camcorders, and TV capture cards | Pro engine |
| VOB (.vob) | The video files inside a DVD's VIDEO_TS folder | Pro engine |
| MXF (.mxf) | Professional cameras and broadcast workflows | Pro engine |
| DV (.dv) | MiniDV tape camcorders | Pro engine |
| OGV (.ogv) | Open-source software and older web video | Pro engine |
| RM, RMVB (.rm, .rmvb) | RealPlayer video from the early internet | Pro engine |
| DivX (.divx) | Older downloaded movies and DivX players | Pro engine |
It also reads professional and older video types inside those files, including Apple ProRes, Avid DNxHD, HEVC (H.265), H.264, MPEG-2, MPEG-4, VP8, VP9, AV1, and Motion JPEG, plus sound types like AAC, Dolby Digital (AC-3), MP3, Opus, FLAC, PCM, and Windows Media Audio.
Files your browser can't play on its own use the pro engine: the same FFmpeg software that professional tools use, running inside your browser. It's a one-time download of about 10 to 30 MB, and your browser keeps it for next time. AVCHD camcorder clips (MTS and M2TS) usually already contain H.264 video, so the pro engine moves the picture into an MP4 untouched and only converts the sound, which is fast even for long recordings. Pick several clips at once to join them into one video, and use the widescreen fix for MOD and TOD files that come out squished.
When it comes in handy
- iPhone videos that won't upload. Turn MOV files into MP4 for websites, Windows PCs, and upload forms that only accept MP4.
- Website background and hero videos. Make a small WebM or MP4 version that loads fast.
- Emailing and messaging clips. Shrink a 4K clip to 1080p or 720p so it fits attachment limits.
- Editing on a Mac. Package an MP4 as MOV for apps and workflows that expect QuickTime files.
Frequently asked questions
How do I convert MOV to MP4 without losing quality?
Use Quick mode. Most MOV files from iPhones and cameras already contain H.264 or HEVC video and AAC sound, which MP4 supports, so the tool only changes the file's container label. Nothing is re-compressed, and it works on files of any size in about a second.
Why is Quick mode grayed out?
Quick mode only works between MP4 and MOV, and only when the video and sound inside are a type the new format supports. For example, ProRes video or uncompressed sound from pro cameras needs re-encoding to become a standard MP4.
Why can't I choose MP4 or MOV for re-encoding?
Making a new MP4 needs a browser that can record H.264 video. Chrome, Edge, and recent Safari can. Firefox currently records WebM only, so use Chrome or Edge for MP4 output, or Quick mode if your file qualifies.
How long does re-encoding take?
About as long as the video plays, because your browser plays it through once while recording the new version. Keep the tab open and in front, since browsers slow down hidden tabs.
Which format should I choose?
MP4 plays almost everywhere: phones, computers, TVs, social media, and websites. MOV is Apple's format and suits Final Cut, iMovie, and QuickTime. WebM is an open web format that makes small files for websites, but some Apple devices and editing apps don't open it.
Can it open AVI, WMV, MTS, MOD, or MPG files?
Yes. These open with the pro engine, which loads automatically the first time you need it. Re-encoding with it is slower than the browser method, roughly real time for HD on a typical computer and slower on phones. Very large files (over about 2 GB) may be too big for the browser's memory.
How do I join camcorder clips?
Camcorders split long recordings into several files, like 00000.MTS and 00001.MTS. Select them all at once, and the converter joins them in file-name order into one MP4. Clips need to come from the same camera settings to join smoothly.
Can it convert iTunes movies?
No. Movies and TV shows bought from iTunes are copy-protected, and no legitimate tool can convert them. Your own M4V exports from Apple apps work fine.
Is my video uploaded?
No. The conversion runs in your browser, and your video never leaves your device.