OpenAnyFile
Works
Viewing, inspecting and verifying. You get a full player with scrubbing, volume and fullscreen — provided your browser has a codec for the stream inside. File details, exact byte size and the detected signature are always shown.
How to open a .qt file
The short version: QT is a QuickTime Movie from Apple. The longer version — including the quirk that trips most people up — is below, along with a viewer that runs entirely on your own device.
What is a .qt file?
QuickTime Movie is a video format developed by Apple, first appearing in 1991. It is normally produced by Legacy QuickTime exports.
The older extension for the same container Apple now writes as .mov.
| Full name | QuickTime Movie |
|---|---|
| File category | Video |
| MIME type | video/quicktime |
| Magic bytes (file signature) | .. 6D 6F 6F 76 |
| Developer | Apple |
| Introduced | 1991 |
| Usually created by | Legacy QuickTime exports |
| OpenAnyFile engine | HTML5 video player |
| Opens without upload | Yes — parsed locally in your browser |
Open a .qt file in your browser
OpenAnyFile routes .qt to its HTML5 video player, which plays a full player with scrubbing, volume and fullscreen — provided your browser has a codec for the stream inside.
- Open the OpenAnyFile opener in this browser — nothing to download or sign up for.
- Drag your .qt file onto the drop zone, click to browse for it, or paste it with Ctrl+V.
- The extension is detected and the file is handed to the HTML5 video player.
- Your QT opens on its own viewer page: a full player with scrubbing, volume and fullscreen — provided your browser has a codec for the stream inside.
- Use fullscreen for a closer look, or download the file back out unchanged. Nothing is transmitted anywhere — the parsing happens in your own browser process.
What you can and cannot do with it here
Does not work
Editing and re-saving. OpenAnyFile is a reader, not an editor — for changes you still need special software or an equivalent.
Why your {ext} file is never uploaded
Most online viewers work by sending your file to their server, processing it there, and leaving a copy behind on infrastructure you do not control. OpenAnyFile does not. Your .qt file is read through the browser's local File API and decoded by JavaScript and WebAssembly running on your own machine. There is no upload step and no server-side copy — open your browser's network tab while you do it and watch: the file never appears.
Frequently asked questions about QT files
Can I open a .qt file without installing special software?
Yes. OpenAnyFile's HTML5 video player runs in your browser, so you can read a QT file with nothing installed. You get a full player with scrubbing, volume and fullscreen — provided your browser has a codec for the stream inside. For full editing you still need the original application — this is a viewer, not an editor.
How can I check a file really is a QT file?
Look at the first bytes rather than the extension. A genuine QT begins with .. 6D 6F 6F 76. Opening the file in OpenAnyFile shows that signature in the file-details panel, so a file renamed to .qt by mistake is easy to spot.
Is it safe to open a QT file online?
With OpenAnyFile, yes, because nothing is uploaded. The file is read locally through your browser's File API and never leaves your device, so there is no server copy to leak, log or retain. That matters most for the kind of file people are least willing to hand to a random converter site.
What is a .qt file, exactly?
QuickTime Movie — a video/quicktime format created by Apple since 1991. The older extension for the same container Apple now writes as .mov.
Does the same viewer handle formats related to QT?
Yes — the same engine also opens .mp4, .avi, .mkv, so you can compare related files without switching tools.
Related formats
These open with the same engine, so if you have one of these sitting next to your .qt file, it will open too: