View video file metadata including codec, resolution, bitrate, and duration.
Video files wrap their picture and sound in a container that carries metadata describing what is inside: the codecs used, the resolution and frame rate, the duration, and the bitrate. This tool extracts those fields. You select a file or drag one onto the page, and it reports the container format, video and audio codec identifiers, dimensions, duration, frame rate, and an average bitrate, all parsed locally in your browser, so nothing is uploaded and the file never leaves your device. The common surprise: the tool reads what the file declares about itself, not what its frames actually contain. Headers can be stale, edited, or corrupted, and the reported values can disagree with how the video really plays.
You pick a file or drop it onto the page, and the tool parses the container structure in the browser. It works from the header data that describes each stream rather than from the encoded frames, so the process is local: nothing is uploaded, no transcoding happens, and the original file is left untouched.
Duration, dimensions, frame rate, and codec identifiers are stored in the container and stream headers, and the tool reports them as declared. Bitrate is different: most containers do not store a single bitrate value, so the figure shown is an average computed from the file size and the declared duration. It is an average over the whole file, not the rate any single moment plays at.
No. The file is parsed entirely in your browser and its bytes never leave your device. The check itself makes no network request, so there is no upload step and no upload size limit to worry about. This also means the tool is safe to use on recordings you would not want copied to a server.
It is an RFC 6381 codec identifier. The prefix names the codec: avc1 is H.264 carried in an MP4-style container. The six trailing hex digits encode profile, constraint flags, and level: 0x64 is High profile and 0x1F is level 3.1 (the level_idc for level 3.1 is the decimal value 31, which is 0x1F in hex), which the H.264 specification classes for typical use up to 720p at 30 frames per second.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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