WebP vs JPG vs PNG — Which Image Format for the Web?

October 19, 2026 · 5 min read

If you're putting images on a website — a blog, a shop, a portfolio — you eventually hit the three-way question: should this picture be a WebP, a JPG, or a PNG? They all show the same image, so the difference isn't what you see. It's file size, transparency, and how crisp text and edges stay. Pick wrong and your page loads slowly or your logo looks fuzzy; pick right and visitors never notice, which is exactly the goal.

Here's a plain-English comparison, plus a simple rule for each kind of image.

The short answer

For photographs, use WebP if you can and JPG as the safe fallback. For logos, icons, screenshots, and anything with text or transparency, use PNG — or lossless WebP if you want the same quality in a smaller file. If your source images are iPhone HEIC files, you can convert straight to whichever one you need: HEIC to WebP, HEIC to JPG, or HEIC to PNG — all in your browser, so the photos are never uploaded.

What each format is good at

JPEG (the .jpg file) has been the default photo format since the 1990s. It uses lossy compression — it throws away detail your eye is unlikely to miss — which keeps photos small. Its superpower is universal compatibility: every browser, device, and app made in the last 25 years opens a JPG. Its weaknesses are that it has no transparency and that it blurs sharp edges, so text and flat-color graphics look mushy.

PNG (.png) is lossless — it preserves every pixel exactly. That makes it the right choice for crisp lines: logos, icons, screenshots, charts, and anything with text. It also supports transparency (an alpha channel), so a logo can sit on any background. The catch is file size: for a full-color photograph, a PNG is often several times larger than a JPG, which is why PNG is a poor choice for photos on the web.

WebP (.webp) is the modern format Google released in 2010 to do both jobs in one. It offers both lossy and lossless compression, supports transparency, and even handles animation. In practice that means a lossy WebP can replace a JPG at a smaller size, and a lossless WebP can replace a PNG at a smaller size. Google's own tests put lossy WebP images roughly 25–34% smaller than comparable JPEGs, and lossless WebP around a quarter smaller than PNG. Those savings add up fast across a whole page of images.

Compatibility: the one thing to check

For years, WebP's drawback was patchy browser support. That era is over. Chrome, Firefox, Edge, and Opera have supported WebP for a long time, and Safari added it in 2020 (Safari 14, on macOS Big Sur and iOS 14). So every major browser in current use displays WebP, which is why so many sites now serve it by default.

The place you'll still meet trouble is outside the browser: some older desktop apps, email clients, and third-party tools don't read WebP yet. So if an image needs to be downloaded and opened in arbitrary software — not just viewed on a web page — JPG or PNG is still the safer bet. For images that live on your page, WebP is ready.

File size: why it matters for SEO

Image weight is one of the biggest factors in how fast a page loads, and page speed feeds directly into Google's ranking signals and into how many visitors stay versus bounce. Shrinking your images is one of the highest-impact things you can do for both. That's the core reason to prefer WebP for web photos: same visual quality, fewer bytes, faster page. If you must use JPG for compatibility, export at a sensible quality (around 80%) rather than maximum — the file shrinks a lot and the difference is invisible at normal viewing sizes, a trade-off we explain in does converting reduce quality.

A side-by-side summary

• Photographs → WebP (smallest) or JPG (universal). Never PNG — it's huge for photos.
• Logos, icons, line art, text → PNG or lossless WebP. Never JPG — it blurs edges.
• Transparency needed → PNG or WebP. JPG can't do it.
• Animation → WebP (or GIF for the simplest cases).
• Opens literally everywhere, including old software → JPG.
• Smallest files at the same quality → WebP, for both photos and graphics.

Notice there's no single winner. WebP is the best all-rounder for the modern web, JPG is the best compatibility choice, and PNG is the best for crisp, lossless graphics.

So which should you use?

Match the format to the image:

• A photo on a web page? WebP first, JPG as a fallback.
• A logo, icon, or screenshot? PNG, or lossless WebP if you want it smaller.
• An image people will download and open in other apps? JPG or PNG for safety.
• A photo you're just emailing or sharing, not publishing? JPG — it opens anywhere with zero friction.

If your originals are iPhone or iPad photos, they're almost certainly HEIC, which websites often reject outright — see why HEIC won't upload to some sites and the broader HEIC vs JPG comparison for the background. The fix is to convert first. For the web, that usually means WebP; for universal sharing, JPG.

The bottom line

WebP, JPG, and PNG aren't ranked best-to-worst — each is tuned for a different job. Reach for WebP to make web photos small and fast, JPG when an image has to open everywhere, and PNG (or lossless WebP) when edges and text must stay razor-sharp.

Starting from iPhone photos? Convert your HEIC files to WebP for the smallest web-ready images, or pick JPG or PNG from the main converter — all free, all private, and running entirely in your browser, so your photos never leave your device.