How to use the QT converter
- Choose a file. Drop a QT file to convert it to something else, or any other video to convert it to QT.
- Check "Convert to". The converter picks MP4 for QT files and QT for everything else; change it if you need something different.
- Adjust quality if you want a smaller or higher-quality file.
- Click Convert and download the result.
What is a QT file?
.qt is the original QuickTime file extension. It is the same container as MOV and is mostly seen on files from older Macs and QuickTime-era CD-ROMs.
QT is mainly used for old QuickTime movies. It plays on QuickTime Player and VLC.
QT at a glance
| Full name | QuickTime Movie |
|---|---|
| Type | Video |
| Created by | Apple, 1991 |
| Compression | Lossy |
| Typical codecs | H.264 + AAC |
| Can be created here | Yes |
Pros and cons of QT
Good
- Same structure as MOV
Not so good
- The extension is not recognised by many apps
Common QT problems and fixes
A .qt file will not open
Convert QT to MP4.
Frequently asked questions
How do I open a QT file?
QT files play on QuickTime Player and VLC. If yours will not open, convert it to MP4 on this page; that format plays on any device.
How do I convert a file to QT?
Drop any video on this page. "Convert to" is set to QT automatically for files that are not QT already.
Is the QT converter free?
Yes, completely free, with no sign-up and no watermark. Files up to 1 GB each can be converted, and there is no daily limit.
Is my file uploaded to a server?
No. The converter runs inside your browser using WebAssembly, so your file is processed on your own device and never sent to us or anyone else.
Is QT lossy?
Yes, QT normally uses lossy compression, which removes detail you are unlikely to notice to keep files small.