OIMG

Spec sheet

Purpose

OIMG compresses images to reduce file size with minimal quality loss.Read 12 Oct 2026 · oimg.org

Free plan

YesRead 20 Sep 2026 · oimg.org

Privacy

The desktop app processes images on the user's device and does not upload images or collect app telemetry, analytics events, crash reports, or advertising identifiers.Read 12 Oct 2026 · oimg.org

Support

The maker provides an email address for support and custom license inquiries.Read 12 Oct 2026 · oimg.org

Comparison tools

OIMG lets users compare original and optimized images side by side and visualize differences.Read 12 Oct 2026 · github.com

Compatibility

OIMG can convert images back to JPG or PNG with one click.Read 12 Oct 2026 · oimg.org

Compression codecs

OIMG bundles the jpegli, oxipng, and libjxl image encoding codecs.Read 12 Oct 2026 · github.com

Compression modes

bothRead 20 Sep 2026 · oimg.org

Image formats

OIMG supports PNG, JPEG, WebP, AVIF, and JPEG XL.Read 12 Oct 2026 · github.com

License limit

The site says OIMG is free forever for personal and academic use and invites users to contact the maker about custom license arrangements.Read 12 Oct 2026 · oimg.org

Open source

OIMG is released under the GPLv3 license.Read 12 Oct 2026 · oimg.org

Performance

OIMG is written in Rust and uses multithreading and SIMD optimizations.Read 12 Oct 2026 · oimg.org

Quality controls

OIMG computes Pixel Match Percentage, MS-SSIM, and SSIMULACRA 2 in real time.Read 12 Oct 2026 · oimg.org

Supported formats

PNG,JPEG,WebP,AVIF,JPEG XLRead 20 Sep 2026 · oimg.org

Ways to open images

Users can drag and drop images, open them from a file explorer, or run OIMG from the command line.Read 12 Oct 2026 · oimg.org

Plans and prices

Every OIMG plan and price →

Where Specifiction places it

• Image Compression Software#56 of 857.7