Analyzes a video and automatically detects moments where the screen changes significantly, producing a timestamped log with thumbnails you can annotate.
Your video is never sent to a server (processed in your browser)
Choose a video file
Sensitivity40%
How to use
Choose the video file you want to analyze.
Adjust the sampling interval and sensitivity if needed.
Press "Detect scenes" — moments where the screen changed significantly are listed.
Click a thumbnail to see that moment enlarged — handy while you're writing notes.
Add a note to each scene on the right to turn it into a finished log.
No AI — just measuring how much a frame changed
This tool samples frames of your video at the interval you set and measures how much each one differs from the previous frame. Large differences are flagged as candidate "scene change" moments — it has no understanding of what's actually shown. This works well for screen recordings or slide-based presentations with clear cuts, and may over-trigger on constantly-moving footage.
Since it doesn't know what happened at each detected moment, use the thumbnails to add your own notes on the right, turning the raw timestamps into a proper work log or chapter list.
Handy for
Building a log of what happened when, from a screen recording of work
Adding rough chapter markers to a presentation or slide recording
Quickly finding the moments where something changed in a long screen recording
FAQ
Is my video uploaded to a server?
No. All analysis happens entirely in your browser.
Does it explain what happened at each scene automatically?
No — that's not something this tool does. It only detects timestamps and thumbnails; describing what happened is meant to be typed in by you while reviewing the thumbnails.
The detection is too fine-grained or too sparse.
Adjust "Sensitivity" — lower it if there are too many detections, raise it if you're missing real changes. A longer sampling interval also makes detection coarser overall.
Can it log the audio content too?
This feature only looks at visual changes. To capture what was said, use the Audio Transcription tool instead.