Free video tool · runs in your browser

MXF to MP4 converter

Q: Can I use this as an MXF player?

You can watch a three-second preview of the beginning. Your browser makes a temporary MP4 on your device for that preview. Convert the full file to watch the whole clip.

Q: Which MXF codecs can it read?

It includes decoders for XDCAM MPEG-2, AVC-Intra H.264 and DNxHD. Other codec variants or damaged files may not convert.

Q: Can I convert a large broadcast archive?

Use a desktop converter for a large archive. This tool rejects files of 1 GB or more, and smaller files can still run out of browser memory because the source, output and decoder buffers all need space.

Q: Will I lose audio tracks or production metadata?

The MP4 keeps the first video track and first audio track. It does not mix separate audio tracks. Extra tracks, timecode metadata, subtitles, attachments and chapters are dropped, so keep the original MXF as your archive.

Q: Is it free, with no watermark?

Yes. The converter is free. You can download the MP4 without an account or a watermark.

Q: Are my files uploaded?

No. Your browser downloads FFmpeg and runs it on your device through WebAssembly. The video stays on your device during conversion.

Check the first three seconds of an MXF clip before converting the full file to H.264 MP4. Your browser does the work on your device. Nothing is uploaded, and the output has no watermark.

No sign-up
Free download
No watermark
Files stay on your device

Schedule this video in Upstream. Stream it to YouTube or Twitch at a set time, or keep a playlist running 24/7.

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Drop an MXF file here or Choose a file MXF · files under 1 GB · nothing is uploaded

What is MXF?

MXF is a container used for broadcast and editing. It can hold XDCAM MPEG-2, AVC-Intra or DNxHD video, as well as audio and production metadata.

Why convert MXF to MP4?

Upstream does not accept MXF uploads. Convert a clip from your broadcast archive to H.264/AAC MP4 for Upstream or YouTube. The three-second preview lets you check the beginning before converting the whole file.

How to convert MXF to MP4

1
Add your MXF file
Choose an MXF file smaller than 1 GB. Short clips work best.
2
Check the preview
The preview covers the first three seconds. Use it to check the picture and the first audio track.
3
Download the MP4
Set the quality and convert the full clip. Download the MP4 when it finishes.

Conversion settings and limits

Convert to H.264

This converts the video to H.264 and the audio to AAC. A remux only changes the container and would leave the video codec unchanged.

Quality and file size

The quality settings use CRF 18 for High quality, 23 for Balanced and 28 for Small file. A lower number keeps more detail and usually makes a larger file. These settings have no effect when remuxing.

Audio tracks

Audio is converted to 128 kbps AAC. The converter keeps the first audio track; it does not mix separate tracks. Files without audio stay silent.

Browser memory

The file must be under 1 GB. Your browser needs memory for the source, the output and decoding, so even a smaller file can fail, especially on a phone. Use a desktop converter for long recordings or archives.

Keep the original

Keep the original file. The MP4 has only the first video track; it drops subtitles, extra tracks, attachments, chapters and source metadata.

Video output

Re-encoded video is opaque and 8-bit. An odd width or height may be rounded down by one pixel. The converter does not tone-map HDR or preserve Dolby Vision.

Interlaced footage

The converter deinterlaces frames that the decoder marks as interlaced.

Preview memory

The preview is three seconds long, but the browser still loads the whole source file into memory.

Before you convert an MXF

The file stays on your device

Your browser downloads FFmpeg and runs it on your device through WebAssembly. The video stays on your device during conversion.

Free, with no watermark

The converter is free. You can download the MP4 without an account or a watermark.

Files under 1 GB

Keep files under 1 GB. Smaller files can still run out of browser memory, particularly on phones.

Preview before converting

The converter makes a three-second preview so you can check the beginning of a clip.

When to use it

Make an H.264/AAC MP4 from a broadcast archive.
Check the beginning of a clip before converting.
Prepare an MP4 for YouTube or Upstream.

Use it on a 24/7 stream

Download the H.264 MP4 and add it to your Upstream library (see accepted formats and reencoding). Add it to a queue for a 24/7 live stream, or use pre-recorded live streaming for a scheduled broadcast.

FAQ