JPG, PNG or WebP: which format should you choose?
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If you've ever hesitated when saving or converting an image, the short answer is: it depends on what the image is and where it's going. Each format was built to solve a specific problem — understanding that problem makes the choice much simpler.
The problem each format solves
JPEG exists for photographs: it uses lossy compression, discarding details the human eye barely notices to shrink the file considerably. That's why a camera photo saved as JPEG is usually a fraction of the size of the same image uncompressed.
PNG exists for images where losing any detail is a problem: screenshots, logos, icons, rendered text. PNG's compression doesn't discard information — hence "lossless" — which is also what makes real transparency possible.
WebP is newer and tries to cover both cases with a more efficient algorithm, usually producing smaller files than equivalent JPEG or PNG, with support for both lossy and lossless compression, plus transparency.
When each one actually makes a difference
Photos for the web: WebP first, for the smaller file size; JPEG as a more universally compatible fallback.
A logo or icon with a transparent background: PNG if maximum compatibility matters, or WebP if browser support isn't a concern.
A screenshot with text: PNG. JPEG's lossy compression blurs text edges and creates visible artifacts near letters, which is quite noticeable in screenshots.
A file that will still be edited or printed: avoid converting to a lossy format before you're done editing — each JPEG-from-JPEG conversion loses a little more quality.
Does compatibility still matter?
Virtually every modern browser reads WebP without issues. The situation that still causes headaches usually involves more specific software — some older image editors, internal company systems, or when someone explicitly asks for a JPEG or PNG. In those cases, converting back solves it quickly.
How to decide quickly
Need transparency? PNG or WebP. Is it a photo and does file size matter? WebP, with JPEG as a fallback. Need maximum compatibility with any system? JPEG for photos, PNG for everything else.