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

Three formats cover nearly every image on the web, and picking the wrong one quietly costs you bandwidth, loading speed, or visual quality. The good news is the decision is simple once you know what each format is actually good at. Here's the practical comparison — no theory, just the rules that work.

The quick comparison

	JPG	PNG	WebP
Compression	Lossy	Lossless	Lossy or lossless
File size (photos)	Medium	Large	Smallest
Transparency	No	Yes	Yes
Animation	No	No (APNG aside)	Yes
Browser support	Universal	Universal	All modern browsers
Best for	Fallbacks, social cards	Masters, editing	Web delivery

JPG: the universal fallback

JPG has been the standard photographic format since 1992, and it still wins on compatibility — every device, browser, and platform on earth reads it. Use JPG when compatibility matters more than file size: Open Graph social cards, email attachments, and anywhere legacy software is involved. Its weakness is efficiency: at equal visual quality, WebP files are roughly 25–35% smaller.

PNG: the master and editing format

PNG compresses without losing a single pixel, which makes it the right format for masters, screenshots you'll edit later, logos, and line art. But that perfection is expensive — a photographic PNG can be ten times heavier than the equivalent JPG. The common mistake is shipping PNGs to the web when nobody will ever edit them. Archive as PNG; deliver as WebP.

WebP: the web delivery default

WebP combines lossy compression for photos, lossless mode for graphics, full alpha transparency, and even animation in one format — and every modern browser supports it. For anything served on a website in 2026, WebP is the default choice: smaller files, faster loads, better Core Web Vitals scores. The only real exceptions are social preview images (platforms still prefer JPG/PNG) and archival masters.

Decision rules

If you only remember one thing from this guide, remember the split: WebP is for delivering images to browsers, PNG is for masters you'll keep editing, and JPG is the fallback when compatibility beats efficiency. Almost every "which format" question reduces to which of those three jobs the file is doing.

Photo on a website? WebP, quality 75–85.
Logo or graphic with transparency on a website? WebP (lossy 80+ for delivery, lossless for reusable assets).
Master file you'll edit again? PNG (or your camera's RAW).
Social link preview (og:image)? JPG, 1200×630.
Must work on ancient browsers? JPG with a WebP version served to modern ones.

Convert between all three