JPG vs PNG vs WebP: a table that explains image format differences

The same image can be 5× smaller as JPG, PNG or WebP. This article explains how each format compresses, transparency support and browser compatibility, with a recommendation on which to pick.

Format conversion Author tdd8.cn

The same 800x800 product shot can be 1.2 MB as PNG, 180 KB as JPG and as little as 90 KB as WebP. Pick the wrong format and page speed drops by half.

1. What actually differs

  • JPG (JPEG): lossy compression that discards high-frequency detail the eye barely notices. No transparency. First choice for photographs.
  • PNG: lossless, with an alpha channel. Right for icons, logos, screenshots and images containing text.
  • WebP: Google's format, supporting lossy, lossless, transparency and animation; typically 25-35% smaller than JPG at the same quality.

2. Choosing, at a glance

  • Photos, landscapes, portraits -> JPG at quality 80-85.
  • Logos, icons, anything needing transparency -> PNG, or WebP where compatibility allows.
  • Web page illustrations, mobile-first sites -> WebP, the smallest option.
  • Print delivery, or an old system on the other end -> JPG is the safest.

3. Common misconceptions

"PNG is always sharper." PNG is lossless, but converting a screenshot to PNG is often wastefully large: a 1080p screenshot is 2 MB as PNG and 300 KB as JPG at quality 90, with no visible difference on screen.

"WebP has poor support." In 2026 every mainstream browser (Chrome, Edge, Firefox, Safari 14+) supports WebP. Some older in-app browsers are the exception, so deliver JPG/PNG to third parties.

"Renaming the extension changes the format." Renaming .png to .jpg only changes the file name; the encoding does not change and some systems will refuse to open it. Use a real converter such as image format conversion.

4. Two things to watch when converting

  • Transparency: PNG to JPG turns transparent areas black or white, so the converter usually offers a fill colour -- white is the safest.
  • Metadata: camera photos carry GPS coordinates and model information; ticking "remove metadata" protects privacy.

FAQ

Can WebP be converted back to JPG?

Yes, use the format converter and choose JPG output; quality 90+ is recommended.

PNG to JPG made my transparent background black?

JPG has no transparency; pick a fill color (white is common) and choose white background when converting.

Which format is best for marketplace main images?

Platforms usually require JPG or PNG; in practice JPG (quality 85) balances size and clarity best.

Tools used in this guide

Convert FormatSwitch between major formats To WebPSmaller and crisper To JPGAny format to JPG
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