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See everything about a video file: duration, resolution, aspect ratio, frame rate, codecs, bitrate, container details and audio tracks, with a frame preview and a per-track breakdown. Reads MP4, WebM, MKV, MOV and more.
Everything runs locally in your browser. Your data never leaves your device.
Drop video files here
or click to browse (MP4, WebM, MKV, MOV, AVI, MPEG-TS and more)
Files are read in chunks, so even multi-gigabyte videos open instantly.
This tool reads everything a video file will tell about itself. Drop in an MP4, WebM, MKV, MOV, AVI or MPEG-TS file and it lists the container, duration, resolution, aspect ratio, frame rate, codecs, bitrate and every track inside, powered by the same MediaInfo library the desktop tool uses.
Each stream gets its own panel. Video tracks show the codec with profile and level, bit depth, chroma subsampling, color primaries and HDR metadata, and whether the frame rate is constant or variable. Audio tracks show the codec, channel layout, sample rate and bitrate, and subtitle tracks are listed with their language and flags. A frame preview with a scrubber lets you look inside files your browser can decode, and the full raw MediaInfo report is one click away.
The metadata comes from MediaInfo compiled to WebAssembly, not from the browser's video player. That means containers and codecs the browser has no decoder for, like MKV with HEVC or MXF, still report their full details. Only the frame preview depends on the browser's own decoding support, and the tool says so when a codec is out of reach.
Files are read in small chunks as MediaInfo asks for them, so a multi-gigabyte recording opens as fast as a short clip.
Instead of only printing 1.778, the tool names the ratio: 16:9 widescreen, 4:3, 21:9 ultrawide, 2.39:1 anamorphic or vertical 9:16. It uses the display aspect ratio from the container, so anamorphic footage that is stored narrow but displayed wide is reported the way it plays.
For music and other audio files, the Audio Inspector decodes the file and measures real levels on top of the metadata. To study a still frame you exported, the Image Histogram Viewer shows its exposure and color distribution.
Open source does the heavy lifting in this tool. Thank you to:
A WebAssembly port of MediaInfo, the classic tool for revealing what is inside a media file.
Everything this site builds on is listed on the credits page.
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