Is MOV to MP4 a lossless conversion?

No. The video is re-encoded to H.264 and AAC, so it is a lossy transcode. The result is easier to play but is not a bit-for-bit copy of the MOV.

Are subtitles preserved?

No. This conversion path focuses on the main video and audio streams. Subtitle and attachment tracks are not carried into the MP4.

What happens to ProRes video?

ProRes is decoded and re-encoded to H.264. That makes it more compatible but can reduce color depth and editing flexibility, so keep the original master.

Can I convert several MOV files at once?

Yes. Add multiple files to the queue, run them together, and download the converted MP4s as a ZIP.

What is the maximum file size?

Server uploads are limited to 100 MB per file. Longer or higher-bitrate videos may need trimming before upload.

video suite

Convert MOV to MP4 Online

Convert QuickTime MOV videos to MP4 with H.264 video and AAC audio for broad playback. FFmpeg re-encodes the file on the server, with quality control and batch support. The tool is free, accepts files up to 100 MB, and needs no desktop video editor.

Convert .MOV to .MP4

Select a file to begin. Processing details and limits are listed below.

Or paste from clipboard with Ctrl+V

How to convert MOV to MP4

1
Upload MOV files
Add one or more QuickTime videos to the queue. The source can be an iPhone recording or an editing export.
2
Set quality and size
Choose the video quality setting in Options, and resize only if the target device or platform needs smaller dimensions.
3
Convert and download
Run the queue, then download the MP4 files individually or as a ZIP.

QuickTime movie vs MPEG-4 Part 14 video

Spec	QuickTime movie	MPEG-4 Part 14 video
MIME type	video/quicktime	video/mp4
Format type	video	video
Standard	QuickTime File Format	ISO/IEC 14496-14
First release	1991	2003
Browser support	Partial; depends on browser and codec	All current major browsers for common codecs
Contents	QuickTime container with video, audio, timecode, and metadata. Common payloads include H.264, ProRes, AAC, and PCM.	Container for video, audio, subtitles, and metadata. Common payloads include H.264, H.265, AV1, AAC, and MP3.

About QuickTime movie

Deep Apple ecosystem support, professional codecs such as ProRes, and flexible track structure. Not as universally playable as MP4; Windows, Linux, and browser support depends on codecs and third-party software.

Format reference

About MPEG-4 Part 14 video

Broad device support, efficient streaming, flexible codec choices, and good compatibility with social platforms. Compatibility depends on the codecs inside the container, not only the .mp4 extension; advanced subtitles and chapter support vary.

Format reference

Why convert MOV to MP4?

Play an iPhone or QuickTime recording on Windows, Android, smart TVs, and websites that prefer MP4.
Upload a video to a platform that accepts MP4 but rejects the MOV container.
Create a smaller delivery copy from a large camera or screen recording.
Standardize a mixed library on a container that browsers and mobile devices handle consistently.

Will quality change?

The output is re-encoded to H.264 and AAC, not remuxed without changes. That means the video is lossy and may lose some detail, especially from a high-bitrate ProRes or camera master. Quality depends on the selected setting and the source resolution. Subtitles, attachments, and some metadata are not preserved by this conversion path.

Processing and limits

Processing: Server-side
Engine: FFmpeg with libx264 and AAC
Maximum size: 100 MB per file.
Batch support: Yes, multiple MOV files can be queued.
Quality controls: Video quality control and optional resizing. Higher quality values preserve more detail and increase file size.

The MOV is uploaded over HTTPS and processed by FFmpeg in an isolated server process. The output is an MP4 with H.264 video, AAC audio, and fast-start metadata for web playback. Temporary files are removed after the request.

Subtitle and attachment tracks are not carried into the MP4 output.
ProRes, alpha, and other professional MOV features may be lost in the H.264 transcode.
Long videos can hit the 100 MB upload limit before conversion starts.

Platform compatibility

MP4 with H.264 and AAC plays on Windows, macOS, Linux, iOS, Android, smart TVs, and every current major browser. That is a safer delivery combination than a MOV file that may require QuickTime or a professional codec.

When not to convert

Keep the MOV master if you need ProRes, alpha, timecode, or editing-grade metadata.
Use a dedicated subtitle workflow if captions must remain selectable.
Do not re-encode an already compressed video repeatedly if quality is critical.

Frequently asked questions

Is MOV to MP4 a lossless conversion?: No. The video is re-encoded to H.264 and AAC, so it is a lossy transcode. The result is easier to play but is not a bit-for-bit copy of the MOV.
Why convert MOV to MP4?: MP4 with H.264 and AAC is accepted by more browsers, phones, TVs, and upload forms than QuickTime MOV, especially outside Apple devices.
Are subtitles preserved?: No. This conversion path focuses on the main video and audio streams. Subtitle and attachment tracks are not carried into the MP4.
What happens to ProRes video?: ProRes is decoded and re-encoded to H.264. That makes it more compatible but can reduce color depth and editing flexibility, so keep the original master.
Can I convert several MOV files at once?: Yes. Add multiple files to the queue, run them together, and download the converted MP4s as a ZIP.
What is the maximum file size?: Server uploads are limited to 100 MB per file. Longer or higher-bitrate videos may need trimming before upload.

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