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Chrona

Local video frame extractor

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Extract still frames from an MKV file.

MKV can carry many codec combinations. Chrona gives you a local browser workflow when the current decoder can read the video track, and a CLI path when it cannot.

Open the local editor

Why an MKV may not open

MKV is a flexible container, so the extension alone does not predict browser support. A codec, profile, or pixel format outside the browser's decoder can block indexing.

Use the right extraction surface

Try the browser when you want visual trim and preview. For an unusual MKV or a large archive, use the Chrona CLI with native FFmpeg and the same portable plan model.