Choosing the right image format affects file size, quality and compatibility. The three most common raster formats on the web are JPEG, PNG and WebP. This guide explains their strengths and weaknesses so you can pick the best format for your use case.
JPEGs use lossy compression to reduce file sizes significantly, making them ideal for photos and web images. They offer universal support across browsers and devices. However, JPEGs do not support transparency and every time you re‑save a JPEG it loses a little more data (generation loss). Use JPEGs for photographs and situations where file size matters more than pixel perfection.
PNG files use lossless compression, preserving every pixel exactly. They support 8‑bit alpha transparency, making them the go‑to format for logos, icons, screenshots and graphics. Because PNGs retain more information, their file sizes are much larger than JPEGs. Choose PNGs when you need crisp edges, text or transparency, and when you can afford the extra bytes.
Developed by Google, WebP supports both lossy and lossless compression in one format. Google’s compression study reports smaller same-quality file sizes than comparable JPEG images, and MDN documents WebP support for transparency and animation. Use WebP as a practical default for many web images, but keep JPEG or PNG when a CMS, ad platform, social network, or client workflow still expects older formats.
Use this simple decision tree to choose your format:
Our Image Converter and Image Compressor make it easy to switch between JPEG, PNG and WebP. When converting, experiment with quality settings to balance file size and fidelity.