Subscription tier limits
Up to 953.7 MB
Batch: 1 file
Up to 9.31 GB
Batch: 5 files
Up to 93.13 GB (streamed)
Batch: 50 files
Drop your video
JAD reads the chapter metadata
Download the JSON list of chapters with start times and titles
0 bytes uploaded. Chapter Extractor (Markers → JSON) runs entirely in your browser using WebCodecs, WebGPU, and FFmpeg.wasm. Pro + Media uses chunked streaming via the File System Access API — your video is never buffered to RAM in full and never leaves your machine.
An empty array is returned. Use the scene detector to auto-generate chapters from visual cuts.
Auto-detect hard cuts using FFmpeg's scene-change detection. Returns a JSON timeline of cut timestamps for highlighting reels.
Open toolPull JPG or PNG thumbnails at fixed intervals (every 1s, 5s, 10s) or at evenly-spaced positions. Returns a ZIP of frames.
Open tool