A smaller image can load faster, but the right format and quality depend on the image content, display size, and delivery context.
Photographs, illustrations, logos, and screenshots respond differently…
Photographs, illustrations, logos, and screenshots respond differently to lossy and lossless formats. Compare the output at the actual display size.
Keep the original file and verify dimensions,…
Keep the original file and verify dimensions, transparency, metadata, and visual artifacts before replacing a production asset.
Use responsive image sizes and meaningful alt…
Use responsive image sizes and meaningful alt text separately from compression. File size alone does not make an image accessible or useful.
Use the related tool carefully
This guide is paired with a browser-only utility. The tool is a practical aid for small examples and inspection; it is not a substitute for application testing, a formal data pipeline, or professional review where the decision has higher consequences.
Open the related Image Compressor