CCleaner
Glary Utilities
BleachBit
AVG PC TuneUp
Advanced SystemCare
Clean Master
Auslogics BoostSpeed
CleanMyMac X
imgZilla
TinyPNG
BulkPicTools
Caesium Image Compressor
ImageOptim
Squoosh
TinyJPG
CCleaner
imgZillaCCleaner is recommended for users looking for a straightforward tool to clean up their system. It's particularly useful for individuals who are not very tech-savvy and prefer a simple, user-friendly interface for regular maintenance tasks.
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imgZilla's answer:
Batch-compresses images and entire folders in place, fully offline, with visually lossless quality and a dead-simple, one-drag workflow.
imgZilla's answer:
Most compressors upload your images or spit out renamed copies you have to sort through โ ImgZilla does neither: it runs fully offline and compresses in place, keeping the same filename, path, and format. It also handles entire folders recursively with no quality dial to fuss over, and includes a built-in compare view so you can verify the visually lossless result yourself instead of taking it on faith.
imgZilla's answer:
Web developers, designers, photographers with large photo libraries, and privacy-conscious Mac users who'd rather not upload images to a web tool.
imgZilla's answer:
Four years ago I built a simple web-based image compressor and shared it online. People used it, but the recurring pushback was: was it really processing locally, or uploading photos to a server โ and could it just be a native app instead? I didn't have a good answer at the time, so I said I'd figure out the technical issues later. It took a few years, but ImgZilla is that answer โ a native macOS app that runs fully offline and compresses in place, built to finally close the gap that old thread left open.
imgZilla's answer:
ImgZilla's core tech stack:
PNG โ oxipng (truly lossless) SVG โ svgcleaner (truly lossless) JPEG โ libjpeg-turbo (visually lossless re-encoding) WebP โ libwebp (visually lossless re-encoding) AVIF โ libavif + libaom (visually lossless re-encoding) HEIC โ Apple's native ImageIO framework (visually lossless re-encoding) GIF โ gifsicle (visually lossless re-encoding)
It also runs inside Apple's App Sandbox, which restricts it to only reading and writing files the user explicitly selects or drags in โ the same constraint that makes fully offline processing possible in the first place.
imgZilla's answer:
Works great - very useful
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
BulkPicTools - Edit and optimize images online for free. Compress, resize, crop, and convert photos instantly. Process multiple images at once in your browser - no upload, 100% private.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.