Image Compressor

<strong>JPEG</strong> is universal lossy compression — best for photos with smooth color gradients. <strong>WebP</strong> (Google, 2010) is a modern lossy format that produces 25–35% smaller files than JPEG at equivalent quality, supported by every modern browser. <strong>PNG</strong> is lossless — perfect quality but much larger files. Use JPEG/WebP for photos, PNG for graphics with sharp edges (logos, screenshots, transparent backgrounds).

0.80–0.90 is the sweet spot for most photos — visually indistinguishable from the original at less than half the file size. Below 0.70 you start seeing JPEG artifacts (blocky regions, ringing around edges). Below 0.50 the loss is obvious. For thumbnails or images that will be heavily resized, you can push lower; for hero images or printed work, stay above 0.85.

PNG is lossless — there's no 'quality' to trade. PNG file size depends on image content (more colors = larger file) and the encoder's compression level (effort, not quality). For PNG-like quality at smaller size, use WebP lossless mode (about 25% smaller than PNG).

No — and it makes quality worse. JPEG and WebP are generational losses: each save introduces new artifacts. Always compress once from the original. If you need a smaller file, redo from the original at lower quality, never compress an already-compressed image.

Depends on content and dimensions. A 4K photo at q=0.5 might be 200KB. A thumbnail at q=0.7 might be 5KB. For web use, also resize to actual display dimensions before compressing — a 4000×3000 hero image displayed at 1200×900 is 9× larger than it needs to be regardless of quality settings.

No. Compression runs entirely in your browser using HTML5 canvas and the browser's built-in encoders. Your image is never sent to any server, logged, or stored. You can safely compress private photos, business documents, or any sensitive imagery.