MP4 container inspector
Video Metadata Viewer
Read MP4 duration, dimensions, codecs, tracks, brands, and stored dates.
SupportedMP4
Your files never leave your device.
Waiting for a fileDrop a file hereMP4
Processed in this tab. Nothing is uploaded.Useful details, without the lecture.
- Inspects MP4 container boxes without analyzing frames.
- Summarizes duration, dimensions, codecs, and tracks.
- Reports compatible brands and stored authoring details.
- Runs the parser away from the main UI thread.
What this result cannot prove
- Only MP4 containers are in scope; MKV, MOV variants, and AVI are not promised.
- Video frames and audio speech are never analyzed.
- Metadata removal for video is not part of this MVP.
Quick answers
Does the tool watch the video?
No. It reads container metadata and never performs pixel recognition.
Why is a codec missing?
Damaged or unusual track boxes may not expose a readable codec label.
Can a large video freeze the page?
Parsing runs off the main thread and is capped at 100 MB with a timeout.