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ImgCompress vs 4K Image Compressor: catalog facts
ImgCompress	4K Image Compressor
Free Free and open source under the GPL-3.0 licence.	Freemium Free download with a paid premium upgrade.
Web, Self-hosted	Windows, macOS
Handles more than 70 input formats including HEIC and RAW Local AI background removal with no cloud uploads	Compress to a percentage or an exact target file size Batch processing of many images
Requires Docker AI background removal runs on CPU, which may be slow on weak hardware	Some features are reserved for the paid premium tier Closed source
Self-hosted	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
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.