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Converseen vs Resizer: catalog facts
Converseen	Resizer
Free Free and open source; donations accepted.	Freemium Lite edition is free; a Pro licence is sold on the den4b site.
Windows, macOS, Linux	Windows
Converts and resizes whole batches of images at once Supports over 100 image formats	Simple drag-and-drop batch workflow Fit, fill and crop, or stretch resize modes
Not a full image editor, only batch operations PDF conversion needs extra setup according to the help pages	Windows only Limited to BMP, GIF, PNG, JPEG and TIFF
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License: CC-BY-NC-ND-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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