BYTETOOLS

Video Metadata Viewer

See a video's duration, resolution, frame rate, codecs, rotation flag and creation date. Reads MP4, MOV, WebM and MKV headers without uploading the file.

Drop a video here or click to browseOnly the container headers are read — the file is never uploaded and never decoded.

What you will see

Drop an MP4, M4V, MOV, WebM or MKV file above and this page lists its duration, resolution, frame rate, video and audio codecs, rotation flag, track languages and creation date. It reads the file's index directly, so even a multi-gigabyte recording is inspected in a moment.

What is the Video Metadata Viewer?

The ByteTools Video Metadata Viewer reads what is actually inside a video file: exact duration, resolution, frame rate, the video and audio codecs, the rotation flag, track languages, audio channels and sample rate, and the creation date stored by the camera or editor.

  • Exact duration, resolution, frame rate and aspect ratio at a glance
  • Per-track codec, language, audio channels and sample rate
  • Reads the rotation flag that makes phone videos play sideways
  • Handles MP4 files whose index sits at the end, not the start
  • Reads only the header bytes, so huge files are inspected instantly
  • 100% local — the file is never uploaded

How to use the Video Metadata Viewer

  1. 1

    Drop an MP4, M4V, MOV, WebM or MKV file onto the box, or click to browse.

  2. 2

    Read the headline figures: duration, resolution, frame rate and aspect ratio.

  3. 3

    Check the container panel for the exact duration, format, brands and creation date.

  4. 4

    Scroll the track table for per-track codec, size, frame rate, rotation, audio and language.

  5. 5

    Click Copy full report to put the whole summary on your clipboard.

About the Video Metadata Viewer

The ByteTools Video Metadata Viewer reads what is actually inside a video file: exact duration, resolution, frame rate, the video and audio codecs, the rotation flag, track languages, audio channels and sample rate, and the creation date stored by the camera or editor.

It parses the container by hand — MP4, M4V and MOV atoms, and the EBML elements inside WebM and MKV — rather than decoding any pictures. That means it only reads the file's index, so a multi-gigabyte recording is inspected almost instantly, and it can find the index even when it sits at the very end of the file. A Copy full report button gives you the whole thing as plain text.

Everything happens 100% locally in your browser. The file is never uploaded and never even fully read — only the handful of header bytes that matter. That makes it safe for confidential footage, and it works offline once the page has loaded.

Frequently asked questions

How do I check a video's resolution and frame rate?

Drop the file onto this page and both appear immediately in the summary at the top. The frame rate is calculated from the file's own timing table, so it shows true broadcast rates like 29.97 rather than rounding them to 30.

Why does my phone video have a rotation flag?

Phones record in one physical orientation and store a rotation value telling players to turn the picture. The frame itself stays as recorded, which is why some editors show the video sideways — they ignore the flag that players honour.

What video formats does this metadata viewer support?

MP4, M4V and MOV files, which share the ISO base media structure, plus WebM and MKV, which use EBML. AVI, FLV and other older containers are not read — convert one of those to MP4 first if you need its details.

Is my video uploaded to check its metadata?

No. The tool reads a few kilobytes of header data directly from the file on your device using the browser's own file API. Nothing is transmitted, which is why even a 20 GB recording is analysed in a moment.

Why is the creation date missing or wrong?

Not every file carries one, and many editors reset it when they export. Some cameras also write the date without a timezone, so it is shown in UTC. Treat it as a useful hint rather than proof of when something was filmed.

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