Video Toolkit — Details, Frames, Contact Sheet and Sound

Video Toolkit opens a video once and puts everything you can do with it in one place, so you do not choose the same file on four pages. Drop in an MP4, MOV, WebM or MKV from your phone, camera or screen recorder, and switch between four panels. Details reads what the file says about itself: the container and brand, its length and overall bitrate, and for every track its codec (H.264, H.265/HEVC, AV1, AAC, Opus …), the picture size and aspect ratio, the frame rate and frame count, any rotation, the audio sample rate and channels, the language, and the date the camera wrote — useful before uploading a video somewhere that has limits, or to see why one will not play. Frames saves the frame on screen as a JPG or PNG, or many at once — one every few seconds, or a number spread evenly — in a single ZIP, at full size or smaller. Contact sheet lays frames out in a grid with the time on each and the file’s details at the top, as one image up to 4K wide: a quick way to show what a long video holds, or to pick a thumbnail. Sound saves the soundtrack as a WAV file, decoded by the browser at 48 kHz and 16 bits, as recorded or mixed down to mono — for an edit, a transcript or the music. The single pages for details, frames and contact sheets use exactly the same parts, so they behave the same.

1. Choose or drop a video.
2. Pick Details, Frames, Contact sheet or Sound.
3. Choose the options for that panel and save the file it makes.
4. Switch panels for the same video, or choose another.

• Frames, contact sheets and sound need a video this browser can play: H.265/HEVC, ProRes, AC-3 or DTS may not be supported, depending on the browser and system. Details still read MP4 and MOV files.
• Codec and per-track details are read from MP4 and MOV; for WebM and MKV the page shows what the browser reports.
• Very long videos make large WAV files (about 11 MB a minute in stereo) and may be too long to decode at once in a tab.
• This is not a video editor: it does not cut, join, compress or convert video.
• The video is opened in this tab and never uploaded; the frames, sheets and sound files are made here and saved straight to your device.

Open the video, choose Sound and press Save the sound as WAV. The soundtrack is decoded in your browser and saved as a WAV file; nothing is uploaded.

Yes: in Frames, move to the moment you want and save it as JPG or PNG, or save many frames at once in a ZIP.

No. Everything happens in this browser tab, and the files you save are made on your device.

The browser lacks the codec, which is common with H.265/HEVC from phones and ProRes from cameras. Details still work; for frames and sound, try another browser or convert the video to H.264 first.