Video File Information
Choose a video on your own device and read its duration, dimensions, aspect ratio, file size and reported type. The file is read in your browser and never uploaded.
Your file stays on your device. This tool reads the video in your browser using the same playback engine the page itself uses. Nothing is uploaded, nothing is sent to a server, and closing the tab discards it.
Only use A2Z Video Tools with content you own, content in the public domain, or content you have permission to download, save, convert or use. Users are responsible for complying with applicable laws and the terms of the source platform.
What this reads, and how
When you choose a file, the browser gives this page a reference to it in local memory and nothing more. That reference is handed to an ordinary video element, the same one used to play video anywhere on the web, and the details below come from what the browser reports once it has read the file header. There is no upload step because there is nothing to upload to: this page has no server component at all. If you disconnected from the internet after loading it, the tool would still work.
What a browser can and cannot tell you
A browser reports what it needs in order to play something: duration, pixel dimensions, and whether it can decode the file at all. The operating system supplies the file name, size and its guess at the type.
It will not tell you the codec, the exact frame rate, the number of audio channels or the encoder settings. Those live inside the container and reading them means parsing the file structure rather than playing it, which is what dedicated tools like MediaInfo or ffprobe are for. Any web page claiming to show you a codec from a plain file picker is either guessing from the extension or sending your file somewhere.
About the average bitrate
The figure shown is the whole file size divided by its duration. It includes the audio track and the container overhead, so it sits a little above the video bitrate the encoder was set to. On a variable bitrate file it is an average across the entire runtime; individual moments will be well above and below it.
When a file will not open
A file that fails here is usually a codec problem rather than a corrupt file. The container and the codec inside it are separate things: an MKV or an MP4 can hold any of several codecs, and browsers support a narrow set. Older formats and some professional camera codecs simply are not among them. The file is fine; this particular reader cannot decode it.
Protected content will also refuse, and that is by design. This tool does not attempt to read anything the browser will not hand it.
Common questions
How do I check a video's codec and bitrate?
Choose the file above and the tool reads its duration, dimensions, type and size in your browser. For deeper fields like the exact codec, the container has to expose it; what the browser can read is shown honestly, and nothing is uploaded.
Is my video uploaded when I check it?
No. The browser reads the file locally through the same engine it uses to play video. There is no upload endpoint on this site at all, which is a stronger guarantee than a promise.
Why does the reported type differ from the file extension?
The extension is just part of the filename; the type is what the file declares inside. A renamed file keeps its real internal type, and mismatches like that are the cause of half of all playback problems.
What does the aspect ratio tell me?
Whether the video fits its destination without cropping or bars: 16:9 for standard players, 9:16 for vertical platforms, 1:1 for feeds. The aspect ratio calculator on this site converts between them without distortion.