Check video & audio format

What it shows

• Format (container): MP4, MOV, WebM, MKV, WAV, MP3 and more, identified from the file’s contents, not its extension.
• Video: codec (H.264, H.265, VP9, AV1 and others), resolution, frame rate (constant or variable), frame count, bitrate, profile, color format, rotation and HDR.
• Audio: codec (AAC, MP3, Opus, PCM and others), channels, sample rate, bit depth, bitrate and language.
• All fields: everything MediaInfo reads, listed under MediaInfo’s own names. You can save the result as JSON.

Fields that are missing from the file or could not be read are shown as “Not available”. They are never filled in with 0 or a guess.

About “Loading in this browser”

After the check, the tool separately tries to load the first frame or sound in this browser. Even if it loads here, it may not play or upload in other browsers, apps or sites. If it doesn’t load here, the file isn’t necessarily broken: this browser may simply not support the codec.

How it works and limits

• The analysis uses mediainfo.js, a browser build of MediaInfo (MediaInfoLib). The first time, the analyzer (about 2.5 MB) is downloaded from this site.
• Your file is not uploaded. Only the parts needed are read; the whole file is never loaded into memory.
• Files up to 64 GB. The analysis reads at most 512 MB and stops after 60 seconds. Formats without an index, or very long files, may hit these limits.
• It does not check whether the file meets a specific site’s current requirements.