Quick answer
PNG is best for transparency, screenshots, logos, and lossless graphics. JPG is best for photos, smaller web images, email attachments, and broad compatibility. If your image has no transparency and file size matters, JPG is usually the better choice. If crisp edges, alpha transparency, or repeated editing matters, keep a PNG copy.
Use the right free tool
Pick the converter below based on your goal. Each tool includes privacy notes, steps, FAQs, and related guides.
Best practice
Keep your original file, create the converted copy, then compare quality and file size before publishing or sending. This keeps your workflow safe while improving compatibility and speed.