Optimage 3.5.1 Portable for macOS

by shaheen ismail · January 9, 2026

Optimage 3.5.1 Portable for macOS

Optimage 3.5.1 Portable for macOS is an advanced image-optimization tool to minimize images in a visually lossless way for websites, apps, storage, and sharing. It uses advanced metrics to automatically adjust image quality for up to 10x smaller image files that are visually perceived as originals. The maximum compression ratio is achieved by exhaustively trying various compression parameters and image-data structures, using novel and traditional heuristics

Automatic image compression

Intelligent lossy and lossless image compression
Achieve consistent good quality with custom perceptual image quality metrics and improved encoders
Nearly optimal image compression, the highest lossless compression density among known compressors
Avoid double compression with smart no-reference image quality assessment
Intelligently convert 24-bit PNG images too much smaller 8-bit indexed color images with full alpha transparency using perceptual color quantization and adaptive dithering
Greatly reduce the size of full-color images using alternative near-lossless compression
Full-color management with ICC profile support
Convert to sRGB for consistent color on the web and mobile
Automatic chroma subsampling and grayscale conversion
Securely remove personal information and hidden metadata (Exif, XMP, IPTC, GPS geotags, comments, thumbnails, etc)
Preserve some useful metadata (Android 9-patches, png, etc)
Losslessly auto-rotate photographs using Exif Orientation tag
Scale a video or animation and adjust the frame rate for optimal file size

Powerful image workflow

Set up batch processing to streamline the optimization of large numbers of images
Fast and auto-scalable parallel processing on modern multicore systems
Full control over-the optimization process with pausing and automatic termination
Resize, convert and rename images in batch mode
High-quality image scaling in 128 bits-per-pixel linear light using Lanczos resampling
Configurable file renaming and destination folder, absolute or relative
Export optimized files to a chosen folder preserving subfolder structure
Copy or move files using drag-and-drop or clipboard
Overwrite or move originals to Trash to restore any time
Preserve file timestamps to keep your library in order
Fully native app available for Mac, Windows (coming later) and Linux (coming later)
Simple command-line tool to integrate into your image workflow
Seamless integration with Finder and Sketch
Quickly share optimized images using extensions in the Share menu

Support for industry standards

Optimize all popular image formats including JPEG, PNG, APNG, GIF, SVG, WebP, HEIC, and PDF
Optimize most common video formats including MPEG-4, H.264, WebM, and AV1
Minify ICO Windows icons, or favicons, and ICNS Apple icons

High-quality format conversion

Convert all common image formats supported by your system including HEIC, JPEG2000, TIFF and RAW
You can convert Apple’s new high-efficiency image format HEIC to optimized JPEG, PNG or WebP for sharing
Convert a camera raw image to JPEG or WebP image optimized for sharing
Also convert between animation and video formats including GIF, APNG, MP4, WebM, HEVC, and ProRes
You can convert animated GIF to efficient MP4, WebM or AV1 video with accurate dithering removal and color depth restoration
Create a high-quality animated GIF from APNG, MOV, MP4, WebM or ProRes video
Avoid the color shift when converting an animated GIF or APNG to MP4 video
Easily create responsive images and thumbnails using high-quality scaling
quality previews for PDF, PSD, and AI documents