When a workflow needs a QuickTime .qt file
QT is a filename extension associated with the QuickTime container family, which also includes MOV. Convert MP4 to QT when an older application or delivery specification explicitly requests a .qt file. If you only want to watch an MP4 in a modern QuickTime player, conversion may be unnecessary.
MP4 and QT: two containers with different delivery uses
MP4 is the MPEG-4 Part 14 container standardized by the MPEG group. It packages video and audio and is widely used for sharing recordings. It can hold different codecs, so an MP4 may already play in QuickTime without conversion.
QT is a filename extension associated with Apple’s QuickTime container format, also used by MOV. QuickTime was designed to hold media tracks, and supports both playback and production workflows depending on the codecs. That flexibility does not guarantee that a particular .qt file will open everywhere. Some tools specifically expect .mov instead.
Convert with FastConvert when a receiving system explicitly requests a QuickTime .qt file. This creates a new encoded copy rather than merely renaming the original, so choose the required codec and quality. If the request is just to watch the movie in QuickTime Player, try the original MP4 first.
What does the recipient actually require?
| Request | Appropriate file |
|---|---|
| A .qt filename | Convert here, using video settings supported by that application. |
| A QuickTime .mov file | Use MP4 to MOV so the output matches the requested extension.MP4 to MOV |
| A movie to watch in QuickTime | Try the original MP4 first. Playback depends on the streams inside it. |
Choose the codec the QT workflow expects
QuickTime is not one video codec
The receiving application must support the video and audio streams inside the container. Check codec requirements as well as the filename extension, especially when delivering to an older version of an editing tool.
Confirm QT rather than MOV
Some workflows ask for QuickTime but actually expect a .mov filename. Use the MP4 to MOV converter for that requirement instead of creating a QT file that the upload form may reject.
Do not assume a lossless container change
FastConvert applies the chosen encoding settings. Treat the output as a new delivery file, keep the MP4 master, and compare quality rather than assuming the conversion only renames or repackages the source.
How to convert MP4 to QT online
Begin with Recommended settings and source-like dimensions. Test the QT file in the exact application that requested it. For recurring deliveries, save the working codec and quality choices as a recipe after this compatibility check.
The free allowance is 2 files per batch, up to 100 MB each, and 20 conversions per 24 hours. No account or watermark. Files are uploaded for server-side processing, then scheduled for deletion after 24 hours on the Free plan.
Save the client’s QuickTime settings
Save the client’s required QT codec, quality and resolution as a recipe for recurring deliveries. Keep the original MP4 for later exports to a different specification.
A free account includes 1 saved conversion recipe. Paid plans add larger batches, more recipes and delivery to Google Drive or Dropbox after you start each batch.