FREE TOOLS

Video Contact Sheet

Create one labelled PNG grid of sampled frames, with a separate JSON manifest of requested and actual source timestamps.

MP4, MOV, WebM, Matroska

PNG, JSON

Browser only

Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.

This tool needs JavaScript. If it does not load, refresh the page and try again.

How to use this tool

Choose one local video file.
Set the time range, thumbnail count, columns and thumbnail width. Download the PNG and timestamp JSON.
Choose Process video and inspect the result before downloading.
Cancel and Reset stop processing and invalidate previous results.

Create a labelled overview of a clip for reviewing scenes at a glance.

Browser-local processing in a killable worker with a 120-second deadline and disabled network. At most 128 MiB input/combined output and a readable duration up to five minutes.
Up to 16 recognized audio/video tracks, 8 megapixels per frame and 8192 pixels per side. Audio tracks must have one or two channels at 8–96 kHz. Local files only, no playlists or URLs.
2–60 thumbnails, 1–8 columns and 96–640-pixel thumbnail width. The complete sheet must fit 8 megapixels and 8192 pixels per side; extreme portrait aspect ratios may require smaller settings.
Samples cover the selected half-open range: start is included and end is excluded. Labels show requested seconds; the JSON gives actual preceding source-frame timestamps. Source holds repeat, and a leading gap produces a labelled black cell. Alpha is composited onto black; no audio.
Decoded work is limited to 9,000 source packets and four billion decoded/output pixels, including separate alpha decoding. The report is not a frame-exact export of every source frame.

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