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TRex vs NormCap: catalog facts
TRex	NormCap
Free Free to download from GitHub.	Free Free and open source under the GPL.
macOS, Command line	Windows, macOS, Linux
Extracts text from images, PDFs and videos Sends recognised text straight to the clipboard	Captures text rather than an image, straight to the clipboard Tesseract recognition with support for many languages
macOS only Accuracy depends on the clarity of the on-screen text	The macOS application is unsigned and must be allowed manually on first start The Linux AppImage is deprecated in favour of Flathub
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 21, 2026

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