JPG vs PNG vs WebP: Which Image Format Should You Use?

Choosing the wrong image format can double your file size or wreck a logo's crisp edges. The good news: the decision usually comes down to a few simple questions. Here is the short version, then the reasoning so you can choose confidently every time.

TL;DR: Use JPG for photographs, PNG for logos, screenshots, and anything with transparency or sharp text, and WebP when you want the best of both for the web — it is typically 25–35% smaller than JPG or PNG at similar quality.

What each format actually is

JPG (JPEG) is a lossy format. It breaks an image into blocks and uses a discrete cosine transform (DCT) to throw away detail your eye is least likely to notice. That math is brilliant for photographs — smooth gradients of sky, skin, and foliage compress to a fraction of their original size. The catch: JPG cannot store transparency, and it struggles with sharp edges. Push compression too hard and you get visible "ringing" or blocky artifacts around text and hard lines.

PNG is lossless — it stores every pixel exactly, so nothing degrades no matter how often you save it. It also supports an alpha channel (true transparency), which JPG lacks. PNG shines on flat color, sharp edges, and text. The trade-off is size: a detailed photo saved as PNG can easily be 5–10× larger than the same photo as JPG, because lossless compression cannot discount detail the way DCT does.

WebP is the modern option, and it does both. In lossy mode it competes with JPG; in lossless mode it competes with PNG — and it supports transparency and animation. At comparable visual quality WebP files are usually 25–35% smaller than the JPG or PNG equivalent, which makes it the default choice for images you publish on a website.

Choose X when…

• Photographs (camera shots, product photos): JPG for broad compatibility, or WebP if you control the website and want smaller files.
• Logos, icons, illustrations with flat color: PNG, or WebP lossless. Both keep edges razor-sharp.
• Anything that needs transparency (a logo over a colored background, a UI element): PNG or WebP. Never JPG — it will fill transparent areas with solid color.
• Screenshots with text: PNG. JPG smears text and adds halos around letters; PNG keeps it pin-sharp.
• Web hero images and banners: WebP first for speed, with a JPG as a fallback if you support very old browsers.
• Simple looping animations: animated WebP is far smaller than a GIF.

File size and quality, in real terms

For a typical 12-megapixel photo, expect a high-quality JPG around 2–4 MB, a WebP of the same photo roughly 25–35% smaller, and a PNG of that same photo often 15–30 MB — which is why PNG is the wrong tool for photos. For a flat two-color logo, the opposite is true: PNG might be a tidy 20–40 KB while a JPG version is both larger and visibly fuzzy around the edges.

Quality is a slider, not a switch. JPG and lossy WebP let you trade detail for size, and somewhere around 75–85% quality most images look untouched at a fraction of full size. If you have a target in mind — say, an email attachment limit or a page-speed budget — you can shrink to a specific number with the image compressor, either by quality or by a target file size in KB.

Compatibility

WebP is supported by every current major browser — Chrome, Firefox, Safari, and Edge — so for the vast majority of visitors it just works. The only reason to keep a JPG or PNG fallback is if you must support genuinely ancient browsers, which is rare today. AVIF is worth a glance too: it can squeeze files even smaller than WebP, though browser support and encoding tools are still catching up.

Practical tips

• Converting a JPG to PNG does not recover quality. The detail JPG discarded is gone; you only get a bigger file. Convert to PNG only when you specifically need transparency or lossless editing.
• Avoid re-saving JPGs repeatedly. Each save re-applies lossy compression, so quality erodes a little every time. Keep an original and export copies.
• Pick the format that matches the content, not the one your camera or screenshot tool happened to use.
• Switching is one step. Use the image converter to move between PNG, JPG, and WebP — for example JPG to WebP to shrink photos for the web, or PNG to JPG when you no longer need transparency. Everything runs in your browser, so your files never leave your device.

When in doubt: photos go to JPG or WebP, graphics and transparency go to PNG or WebP, and the web loves WebP. Match the format to the picture and you will get smaller files that still look great.

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