WebP vs PNG vs JPG: Which Image Format Should You Use?
WebP, PNG, and JPG each win different jobs. A practical guide to choosing an image format for the web — photos, logos, transparency — and converting between them losslessly.
Three image formats cover almost everything on the web, and people pick between them mostly by habit. But the wrong choice means either a blurry logo, a 2 MB hero image tanking your Core Web Vitals, or a transparent PNG where a tiny JPG would do. The decision is simpler than it looks once you match the format to the content.
What each format is good at
| Feature | JPG | PNG | WebP |
|---|---|---|---|
| Compression | Lossy | Lossless | Lossy + lossless |
| Transparency (alpha) | No | Yes | Yes |
| Best for photos | Yes | No | Yes |
| Best for logos / sharp edges / text | No | Yes | Yes |
| Typical file size | Small | Large | Smallest |
| Universal compatibility | Yes | Yes | Near-universal (2026) |
The core split is lossy vs lossless. Lossy formats (JPG, lossy WebP) throw away detail you mostly can't see — great for photographs, terrible for a logo with crisp edges, where the discarded detail shows up as ugly halos ("artifacts"). Lossless formats (PNG, lossless WebP) keep every pixel — necessary for logos, screenshots, and anything with text or hard edges.
When to use each
- Photographs, hero images, thumbnails → WebP (lossy), with JPG as a fallback if you must support ancient clients. Lossy compression is invisible on photos and dramatically smaller.
- Logos, icons, illustrations, screenshots, anything with text → WebP (lossless) or PNG. You need crisp edges and often transparency.
- Images that need transparency → WebP or PNG. JPG can't do alpha at all — a JPG "transparent" background comes out white.
- Maximum compatibility / email / a partner's CMS that rejects WebP → JPG (photos) or PNG (graphics). Boring, but it always renders.
The performance angle (why this is an SEO decision)
Image weight is usually the biggest chunk of a page's payload, and Largest Contentful Paint — a Core Web Vitals metric Google uses — is frequently an image. Shrinking your hero image from a 1.8 MB PNG to a 250 KB WebP can move LCP from "poor" to "good" without touching a line of code.
Convert between them safely
Conversions run entirely in the browser, so the images never get uploaded — fine for client work, internal assets, or anything sensitive.
Turn a WebP into a lossless PNG when you need a universally-supported, transparent source.
Shrink graphics and logos to WebP without losing transparency.
Re-encode photos to WebP for a quick page-weight win.
- Start from the best source you have
Convert from a lossless master (PNG) when possible, so you're not stacking lossy generations.
- Pick the format by content
Photo → WebP/JPG (lossy). Logo, screenshot, transparency → WebP/PNG (lossless).
- Compress and resize for the actual display size
A 4000px image shown at 800px is wasted bytes. Resize to the rendered size, then compress.
After converting, trim the last bytes with compression and right-sizing:
Reduce file size further with adjustable quality, in the browser.
Scale to the size you'll actually display before you ship.
For every image conversion, compression, and favicon utility, see the Image Tools hub.
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