WebP vs PNG vs JPG: Which Format Should You Use?
Three formats, three different jobs. Here is how WebP, PNG, and JPG actually differ — in compression, transparency, and support — plus a one-line rule that gets the choice right almost every time.
Updated May 22, 2026
The short answer
Use JPG for photographs, PNG when you need transparency or pixel-perfect sharpness, and WebP when you want the smallest file for the web and your audience uses modern browsers. The rest of this guide explains why, so you can make the call confidently when the simple rule does not fit.
How each format compresses
JPG uses lossy compression tuned for natural images: it discards detail your eye is unlikely to notice, achieving small files with smooth gradients but no transparency. PNG is lossless — it reproduces every pixel exactly and supports an alpha channel for transparency, which makes it ideal for logos, screenshots, and graphics with hard edges, at the cost of larger files for photos. WebP is the newcomer that does both: it offers a lossy mode that typically beats JPG by 25–35% at similar quality, and a lossless mode with transparency that usually beats PNG.
Transparency and edges
If any part of your image needs to be see-through, JPG is out — it has no alpha channel and will fill transparency with white. PNG and WebP both support transparency. For crisp text, UI elements, and flat-colour illustrations, PNG and lossless WebP keep edges razor-sharp, whereas JPG introduces faint halos (compression artefacts) around high-contrast lines.
Browser and app support
JPG and PNG are universal — every browser, operating system, and app from the last two decades opens them. WebP is supported by all current major browsers, but you may still hit older software, some email clients, or legacy systems that do not recognise it. That is the main reason to keep a JPG or PNG fallback when compatibility matters more than the last few kilobytes.
A practical decision flow
- Photo for the web, modern audience? WebP (lossy).
- Photo that must open anywhere? JPG.
- Logo, icon, screenshot, or anything with transparency? PNG, or lossless WebP if size matters and support is fine.
- Print or archival master? Keep a lossless copy (PNG or the original).
Whatever you decide, you can move between all three formats in seconds with a private, in-browser converter — and if you just need a file to be smaller without switching formats, a dedicated compressor is the better tool.
Quick steps
- 1Pick your target based on the job: WebP for small web images, JPG for universal photos, PNG for transparency or sharp graphics.
- 2Open the image format converter and drop your file in; choose the format you settled on above.
- 3Convert and download. Everything runs locally in your browser, so the image is never uploaded.
Frequently asked questions
Usually, but not always. WebP beats JPG and PNG for most photos and graphics, yet a few images compress better as JPG. The reliable way to know is to convert and compare the file sizes — it only takes a moment.
Yes. JPG has no transparency, so any transparent areas become a solid colour (typically white). If you need to keep transparency, convert to WebP instead, or stay with PNG.
For web images aimed at modern browsers, WebP is an excellent default. Keep JPG or PNG when a file must open in older software, email clients, or systems that may not support WebP.