Practical guide

PNG vs JPEG vs WebP

Choose a format by transparency, detail and size.

What matters

PNG preserves sharp edges and transparency. JPEG is efficient for photographs but has no alpha channel. WebP often balances size and visual quality. The best choice depends on content, browser targets and editing needs.

A safe workflow

Keep the source unchanged.
Test on a representative copy.
Review the output for meaning, not only file size or a green status.
Record the settings that worked.

Common mistake

Automation can make a wrong assumption repeat faster. Confirm encoding, units, schema meaning or visual quality before applying a result broadly.

Choose by content, not habit

JPEG is usually efficient for photographs but cannot preserve transparency. PNG preserves sharp edges and alpha transparency, often at a larger size for photos. WebP can handle both photographic and transparent images with modern compression, but compatibility with an older publishing workflow should be checked.

Practical examples

Use PNG for a transparent logo master, JPEG for a camera photo that does not need transparency and WebP for a web delivery copy when the target browsers support it. Keep the original source separately from every delivery conversion.

Verification

Inspect small text, gradients, faces and transparent edges at the size visitors will see. A lower file size is not useful if halos, banding or unreadable labels appear.