oimg

Make images lighter without degrading visual quality.

OIMG uses modern image compression techniques to reduce file size.

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Open effortlessly

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The OIMG app window receiving an image via drag and drop.
The macOS Finder open-with menu showing OIMG as an available app.
A macOS terminal invoking OIMG from the command line with an image path.

Stay in control

OIMG provides image quality assessment (Pixel Match Percentage, MS-SSIM, and SSIMULACRA 2) — so you don't get blindsided by unexpected quality loss.

OIMG quality metrics view with real-time quality assessment values.

Navigate trade-offs

Compare outcomes before you commit. OIMG keeps the quality, size, and format trade-offs visible while you tune the export.