Use the free Video Metadata Viewer below: see the hidden details of any video file, from length and picture size to codecs and tracks. Nothing is uploaded.
How to use the Video Metadata Viewer
Choose a video file from your device and the tool reads it at once. You do not need to upload anything, install anything, or create an account. The file stays on your device, and only its technical details are shown on screen.
The result starts with three badges: length, picture size and container format. Below them sits a track table. Each row names one track inside the file, such as a video track or an audio track, and shows its codec and extra details, like picture size for video or channel count for audio. The last row shows the file size, so you can compare files at a glance.
Read the plain meaning sentence under the table. It turns the raw numbers into one simple statement, for example that a video lasts two seconds at 640 by 360 and has one video track and one audio track. If a detail looks wrong, try the file again or open it in another player to compare.
Worked example: a two second test video
Here is a real file checked with this tool. The input was a small MP4 test video, 36.1 KB in size, made with a 640 by 360 picture and a simple tone soundtrack. The tool reported a length of 2.0 seconds, a picture size of 640 by 360, and a container format of MPEG-4. The track table listed a video track with codec avc1 and a picture of 640 by 360, plus an audio track with codec mp4a and two channels, followed by the file size of 36.1 KB.
Those values match the file exactly: the test video was built to last two seconds at 640 by 360, with one H.264 style video track and one AAC style audio track. This match is the point of the tool. You can trust the numbers because they come from the file itself, not from a guess based on the file name or extension.
Why check metadata before you share a video
A video file name tells you almost nothing. Two files can both be called clip.mp4, yet one can be a tiny phone recording and the other a large high definition edit. Metadata tells you the truth: how long the video runs, how big each frame is, which codecs it uses, and how many tracks it holds.
That truth saves time. If a site rejects your upload, the codec or picture size is often the reason. If a video plays without sound, the track table may show that it has no audio track at all. If a file is far larger than you expected, the file size row and the track details help you decide whether to compress it or pick another copy.
Honest limitations you should know
Info depth varies by container. MP4 gives the best details, because its structure is well documented and both readers in this tool understand it deeply. WebM gives partial details: you will usually see the length and the tracks, but some fine details may be missing. Other containers may show even less, and the tool says so rather than inventing numbers.
This tool only shows information. It does not edit, convert or repair your file. It cannot add a missing audio track, change a codec, or fix a broken video. Use it to understand a file, then pick the right editing or converting tool for any change you need.
Very large files take longer to read, because the readers scan through the file structure in your browser. Keep the tab open until the result appears. If the detailed reader cannot load, for example when your connection drops, the tool shows a plain error instead of a guessed result, and the MP4 structure details are shown on their own when available.
Frequently asked questions
Does the tool upload my video? No. The file is read in your browser only. Nothing is sent to a server, and closing the page removes all access to the file.
Why does a WebM file show fewer details than an MP4? The WebM container stores less standard metadata, and the readers can only report what the file actually holds. The length and track list are still real.
What does codec mean in simple words? A codec is the method used to squeeze video or audio into a smaller file. Players need the same method to open it, which is why two MP4 files can behave differently.
Can I edit the details shown here? No. This is a viewer only. Editing tags or tracks needs a different tool, and changing them does not change the video itself.
Spanish version: Ver Metadatos de Video Online