Choosing an image format: JPG vs PNG vs WebP
The same image saved as JPG, PNG, or WebP can differ several times over in size, may lose its transparent background, and varies in compatibility. This explains how the three differ and how to choose for the content in front of you.
What really separates the three
JPG (also written JPEG) is a lossy format built for photos. It compresses continuous tone very efficiently, so a photo as JPG is usually far smaller than as PNG. The cost is that every save discards some information, and it has no support for transparency.
PNG is lossless — it keeps every pixel exactly — and supports an alpha channel for transparency. It suits icons, screenshots, and line art: content with large flat areas and sharp edges. Its weakness is that photographic content becomes very large as PNG.
WebP is the newer format that combines both strengths: it compresses photos as efficiently as JPG and preserves transparency like PNG, usually smaller than either at the same look. Its one shortcoming is that a few older programs and devices still do not recognise it.
Choose by content type
Photos and real-scene screenshots: JPG or WebP. Use JPG for compatibility and universality, WebP for the smallest size — especially on the web.
Icons, logos, illustrations, and anything needing transparency: PNG or WebP. Choose PNG for old software or strict lossless needs, WebP for the web and a smaller file.
Text screenshots, line art, QR codes: this sharp-edged content does not suit JPG, which adds noise at the edges. Prefer PNG, or high-quality WebP.
A few common myths
"Converting to PNG makes it sharper" — it does not. Conversion cannot restore lost detail; JPG to PNG only stores the current pixels losslessly, noise and all.
"WebP is always best" — not always. WebP is ideal on the web, but if an image is for others to download or to open at a print shop or in old software, JPG remains the safest universal choice.
"PNG suits everything" — a photo saved as PNG wastes a lot of space. PNG's value is lossless encoding and transparency, not photo compression.
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