Compressa overview

MediaHuman Compressa is a batch image compressor for macOS. Drop in a single photo or an entire folder, and it shrinks JPEG, PNG, WebP, HEIC and AVIF files while keeping every result visually indistinguishable from the original.

Five compression modes cover every use case: Auto for a simple quality slider, Target File Size to hit an exact KB or MB, Reduce to % for a share of the original, Lossless to re-pack without changing a pixel, and Smart, which compares each result to the source with an SSIM measurement and stops the moment the difference would be invisible.

Key Features

Batch-compress JPEG, PNG, WebP, HEIC and AVIF
Five modes, including Smart, which looks identical to the original
Live before/after preview with an estimated output size
Lossless re-packing and format conversion (e.g. JPEG to WebP)
Resize while you compress — by width, height, side, or percentage
Watch folders for hands-off optimization in the background
Full control over EXIF and ICC metadata, with automatic backups of every original