Image Compressor

Image compression reduces file size by removing or approximating image data. Lossy compression (used by JPEG and WebP) discards some detail to achieve smaller files — the quality slider controls how much. Lossless compression (used by PNG) preserves every pixel but typically produces larger files than lossy formats at similar visual quality.

Compressing images improves web performance: smaller files load faster, use less bandwidth, and improve Core Web Vitals. For photos and complex images, lossy formats like WebP or JPEG at quality 75–85 usually offer the best size-to-quality tradeoff.

Lossy compression permanently removes data to reduce file size. JPEG and WebP use lossy compression when you set a quality value. The lower the quality, the smaller the file and the more visible artifacts (blockiness, color banding). Lossy is ideal for photos where minor quality loss is acceptable.

Lossless compression preserves every pixel. PNG and GIF use lossless methods. File sizes are larger, but images are pixel-perfect. Use lossless for logos, screenshots, graphics with sharp edges, or when you need to edit and re-save without degradation.

Large images are one of the biggest causes of slow page loads. Compressing images before uploading can dramatically improve LCP (Largest Contentful Paint) and reduce bandwidth costs. Modern formats like WebP often achieve 25–35% smaller files than JPEG at equivalent quality.

Best practices: compress images to the smallest size that looks acceptable, use responsive images with srcset for different screen sizes, and prefer WebP with JPEG fallback for broad compatibility. This tool helps you find the right quality level before deploying to production.

JPEG is best for photographs. It supports millions of colors and adjustable quality. It does not support transparency. WebP supports both lossy and lossless compression, transparency, and typically outperforms JPEG in file size. PNG is lossless and supports transparency but produces larger files for photos.

When compressing: use JPEG or WebP for photos and complex images. Use PNG only when you need lossless quality or transparency that WebP cannot provide. This compressor outputs JPEG or WebP with quality control — choose based on your compatibility and size requirements.