Why Convert Image Formats?
Different image formats serve different purposes. JPG is best for photographs and complex images — small files, lossy compression, no transparency. PNG is best for graphics with sharp edges, text, or transparency — lossless, larger files. WebP is the modern alternative that often beats both on file size while supporting transparency. Converting between them lets you optimize images for specific use cases: shrink photos for web pages, make PNGs for logos, or convert legacy formats to WebP for modern websites.
Format Recommendations
Use JPG for photographs, hero images, and any complex image with many colors. Use PNG for logos, icons, screenshots, and images that need transparency. Use WebP for everything on modern websites — it's 25-35% smaller than equivalent JPG/PNG and supported by all major browsers. For email or older systems, stick with JPG/PNG.
Quality vs File Size
The quality slider controls the trade-off between image quality and file size for JPG and WebP outputs. 90-95% gives near-perfect quality with significantly smaller files. 70-80% is fine for most web use where users won't notice minor compression artifacts. Below 60%, artifacts become visible. PNG is always lossless regardless of the quality setting.
Privacy and Security
All conversion happens locally in your browser using the HTML5 Canvas API. Your images never leave your device, never touch a server, and are never logged. This makes the tool safe for confidential photos, proprietary graphics, medical images, and any other sensitive content. You can verify by opening your browser's network tab — only the page itself loads, no upload requests appear.