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Best Image Compression Apps 2026: Mobile & Desktop Tools Compared

Whether you're a photographer managing thousands of RAW files, a social media manager posting daily, or just someone trying to free up phone storage — the right image compression app saves time and disk space. Here are the best options across all platforms in 2026.

Best Browser-Based Compressor

Compress2PNG.com — Works on any device with a browser. No install, no upload, no account required. Supports PNG, JPG, WebP, AVIF input with multi-format output. Batch 50 files, quality slider, before/after comparison. PWA support for offline mobile use. Completely free.

Best Mobile Apps

Photo Compress (Android): Lightweight app for batch resizing and compressing photos. Reduce photo size by 80%+ for sharing. Free with ads.
Image Size (iOS): Simple compression and resizing. Supports PNG, JPG, and HEIC. Paid app ($2.99) with no ads.
Google Photos (Both): Built-in "Storage saver" mode automatically compresses uploads. Good for cloud backup, less control over individual files.

Best Desktop Apps

ImageOptim (Mac): Drag-and-drop optimization. Removes EXIF data and invisible bloat. Excellent for PNG optimization. Free and open source.
RIOT (Windows): Radical Image Optimization Tool. Side-by-side original vs compressed view with real-time file size readout. Free.
Squoosh (Browser/Desktop): Google's open-source optimizer. Works in browser or as a PWA. Advanced codec comparison and fine-tuning.

Quick Comparison

Tool	Platform	Price	Privacy
Compress2PNG.com	Browser (all devices)	Free	No upload
Photo Compress	Android	Free (ads)	Local
Image Size	iOS	$2.99	Local
ImageOptim	Mac	Free	Local
RIOT	Windows	Free	Local
Squoosh	Browser/PWA	Free	No upload

Our pick: Compress2PNG.com for convenience (works everywhere, no install) and privacy (nothing leaves your device). Pair it with ImageOptim on Mac or RIOT on Windows for dedicated desktop workflows.