Extract frames locally, without a media upload.
Chrona is designed for a visual workflow where the selected video stays on your device while you trim, preview, and export.
Open the local editorWhat happens in the browser
The browser reads the selected file, indexes its frame timing, and runs extraction in a worker. The source video is not sent to a Chrona media API.
What you need
Use a current browser with video decoding, Canvas, and enough local storage for the archive. MP4, MOV, WebM, and MKV containers work when their video track is supported by that browser.
When to switch to the CLI
Use the local CLI for repeatable jobs, native codec coverage, large filesystem archives, and agent automation. Both surfaces share the same plan and manifest model.