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gImageReader vs OCRmyPDF: catalog facts
gImageReader	OCRmyPDF
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free and open source under the Mozilla Public Licence 2.0.
Windows, Linux	Windows, macOS, Linux, Command line
Supports multiple documents and editable recognition areas.	Places OCR text accurately below the image, so copy and paste lands in the right place Keeps the original image resolution and inserts the text layer losslessly where possible
OCR accuracy depends on scan quality and installed language data.	Command line only Accuracy depends on the scan; poor originals produce poor text
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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