All conversions happen in your browser — images are never uploaded to any server.
Use JPG for photos and images with many colors where small file size is important and minor quality loss is acceptable. Use PNG for graphics, logos, screenshots, and images requiring transparency. Use WebP for web images where you want the best of both - smaller file size than JPG with better quality and transparency support like PNG. WebP is now supported by all modern browsers.
No. Converting JPG to PNG does not restore quality lost during JPG compression. The quality loss from JPG compression is permanent. Converting to PNG will make the file lossless going forward but cannot undo previous compression. Always work with the original high-quality source file.
WebP is a modern image format developed by Google that provides superior compression. WebP images are typically 25-35% smaller than JPG images at equivalent quality, and support transparency like PNG. All major browsers support WebP, and Google recommends using it for better Core Web Vitals scores.
Yes, but transparency will be lost because JPG does not support transparent pixels. Transparent areas will be filled with a background color (usually white). If transparency is important, keep the image in PNG or WebP format instead.
This browser-based image converter can handle most standard image files. Very large images (50 MB+) may be slow due to browser memory limits. The actual size limit depends on your device's available memory. For batch conversion of many large files, a desktop application may be more suitable.