Compress JPG Online
Reduce JPEG photo file sizes with custom quality control and automatic target size matching.
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Supports JPG, PNG, and WebP up to 25 MB • 100% private in your browser
Zero server upload: Your image never leaves your device
Optimizing JPEG Photography
JPEG utilizes discrete cosine transform (DCT) lossy compression designed specifically for continuous-tone photography. Most smartphone cameras export JPEGs with minimal compression (resulting in 5MB–10MB files). Compressing at 82% quality typically reduces file size by 60%–75% with zero perceptible difference on standard displays.
White Background Protection for JPEG
Unlike PNG and WebP, the JPEG format does not support an alpha transparency channel. When converting transparent graphics to JPG, PrintReady automatically paints a clean solid white backing to avoid unpleasant black artifacts.
Frequently Asked Questions
JPEG is inherently a lossy format, but compression between 80% and 85% eliminates unnecessary digital entropy while preserving crisp edges and vibrant color.