Free online PART to MOV converter

A .part file usually means a video download has not finished, while MOV is a playable media container required by some editing and playback software. Complete the download first; only then can the downloaded media be converted to .mov.

What the PART format is

.part is generally a temporary filename for an incomplete Internet download, not a video format. Web browsers and download managers, including Firefox and various file-transfer applications, use it while receiving a file so an interrupted transfer can resume.

A PART file may contain the beginning of an MP4, MOV, WebM, ZIP, or another file type. Its extension does not identify the internal format, and an unfinished file normally cannot be converted successfully because required media data, indexes, or headers are missing.

What the MOV format is

MOV is a multimedia container associated with Apple QuickTime. It can store video, audio, subtitles, timecode, and metadata using codecs such as H.264, HEVC, ProRes, and AAC.

MOV is commonly used in video editing, production workflows, Apple software, and archival exchange. Its compatibility depends on the codecs inside the container; changing a filename to .mov does not convert the media.

How to convert PART to MOV

1. Allow the source download to finish in the browser or download manager. Close the application only after it has renamed the temporary file to its original extension and confirmed completion.
2. If the download stopped permanently, resume it from the same application. Do not try to convert a partial file; missing bytes cannot be reconstructed by a converter.
3. Make a backup copy of the completed file. If it still ends in .part, identify its real format from the original download URL, download details, or file signature. Rename the copy to the expected extension only when the download is complete; for example, use video.mp4 if the source was an MP4.
4. Convert the complete media with FFmpeg. For a normal MP4 source, a broadly compatible command is ffmpeg -i video.mp4 -c:v libx264 -c:a aac -movflags +faststart output.mov. Replace the input filename with the actual completed file.
5. If the source codecs are supported in a MOV container, try remuxing without quality loss: ffmpeg -i video.mp4 -c copy output.mov. If FFmpeg reports incompatible streams or the resulting file does not play, use the transcoding command instead.

You can also upload the completed media file to the free converter on 101convert.com without installing software. A PART file that is still incomplete will not become usable through an online conversion.

Quality and compatibility limits

The -c copy method preserves the original audio and video quality because it changes the container without re-encoding, but it may not work when the source codecs are unsuitable for MOV. The H.264/AAC command re-encodes the streams and may reduce quality; use a higher video bitrate or a quality setting such as -crf 18 when quality matters: ffmpeg -i video.mp4 -c:v libx264 -crf 18 -c:a aac -b:a 192k output.mov.

Before conversion, verify that the complete file plays and has the expected duration. If FFmpeg reports a truncated or invalid input, the download is incomplete or damaged and must be downloaded again.