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Cat-Catch vs Stream Detector: catalog facts
Cat-Catch	Stream Detector
Free Free, with source published on GitHub.	Free Free to use; the source is published on GitHub.
Browser extension	Browser extension
Detects media resources automatically as a page loads Downloads HLS m3u8 streams	Detects HLS and DASH playlists and subtitle files Generates download commands for external tools
Cannot save DRM-protected streams Documentation is mainly in Chinese	Does not download streams itself Requires a separate command-line downloader
Browser extension	Browser extension
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.