Why compress JPEG images?
Large JPEG images slow down your website, consume storage space, and take longer to share via email or messaging apps. Compressing JPEGs reduces file size while preserving visual quality — making your images load faster on the web, use less bandwidth, and fit within file size limits for uploads and attachments.
När ska man använda JPEG vs WebP vs PNG
- JPEG: Best for photographs and complex images with many colors. Universal support.
- WebP: Modern alternative to JPEG — 25–35% smaller at the same quality. Supported by all modern browsers.
- PNG: Best for graphics with text, logos, screenshots, or images needing transparency. Förlustfri.
JPEG-komprimering förklaras
JPEG uses lossy compression based on the Discrete Cosine Transform (DCT). The quality parameter (0–100%) controls how much data is discarded. At 100% quality, compression artifacts are nearly invisible but file sizes remain large. At 80% (our default), you get excellent visual quality with significantly smaller files. Below 50%, artifacts like blockiness and color banding become visible.