Which Image Format Should You Use: JPG, PNG, SVG or WebP?

Match the format to the image, not the image to a habit. Use WebP for photographs, which Google reports are 25 to 34% smaller than JPEG at the same quality (Google, updated August 2025). Use PNG for transparency and sharp graphics, SVG for logos and icons, and keep JPEG as the universal fallback for older browsers. There is no single best format, only the right one for each picture.

The formats at a glance

Each format wins for a different kind of image. The table below is the short version; the sections after it explain when each one is right.

Format	Best for	Transparency	Type
JPEG (JPG)	Photographs, widest support	No	Raster, lossy
PNG	Logos, screenshots, sharp edges	Yes	Raster, lossless
SVG	Logos, icons, diagrams	Yes	Vector
WebP	Most web photos today	Yes	Raster, lossy or lossless

Summarized from MDN's image format guide and Google's WebP documentation, matched to common web use.

JPEG: the default for photographs

JPEG is the long-standing choice for photographs. MDN calls it a good choice for lossy compression of still images, meaning it drops detail the eye barely notices in order to save size.

Its strength is universal support. Every browser, phone, and device opens a JPEG without help.

Its weakness is that WebP and AVIF now beat it on file size. JPEG also has no transparency, so it cannot sit cleanly over a colored background. Use it for full photographs, not for logos or graphics with hard edges.

PNG: transparency and sharp graphics

PNG is the format for transparency and crisp graphics. MDN prefers PNG over JPEG when an image needs precise reproduction, or when transparency is needed.

That makes PNG right for logos, screenshots, icons, and anything with sharp text or lines. It keeps every pixel exactly, with none of JPEG's lossy blur.

The trade-off is weight. A PNG photograph is far heavier than the same photo as JPEG or WebP, so reserve PNG for graphics, never for photos.

SVG: logos and icons that never blur

SVG is a vector format, drawn from math rather than a grid of pixels. MDN describes it as ideal for user interface elements, icons, and diagrams that must be drawn accurately at different sizes.

Because it is built from shapes, an SVG logo stays razor-sharp on a phone, a laptop, or a large display, at a tiny file size. It is also the modern choice for a favicon.

SVG suits flat graphics: logos, icons, and simple illustrations. It is the wrong tool for a photograph, which holds far too much detail to describe as shapes.

WebP: the modern default for web photos

WebP is the current default for photographs on the web. MDN calls WebP an excellent choice that offers much better compression than PNG or JPEG (MDN), with support for transparency and animation.

Google's own figures put lossless WebP 26% smaller than PNG, on top of the 25 to 34% saving over JPEG. You get PNG-style transparency at close to JPEG-style weight, which is why it replaces both for most web photos.

Support is now broad. MDN notes WebP has support in the latest versions of major browsers, though not deep historical support, so a JPEG fallback still matters for very old browsers.

What about AVIF?

AVIF is the newest format, and it compresses even smaller than WebP. MDN puts lossy AVIF around 50% smaller than JPEG.

Because browser support is still catching up, AVIF is served with a WebP or JPEG fallback through responsive image markup. Treat it as a bonus layer on top of WebP, not your base format yet.

When the verdict flips

The verdict flips in a few real cases, and pretending otherwise would mislead you. If your audience runs very old browsers or software, JPEG and PNG stay the safe universal choice, and WebP needs its fallback.

A brand asset headed for print matters more as a high-resolution PNG or a vector source than as a light web file. And a platform that only accepts JPEG, as some older systems do, simply makes the choice for you.

In our experience maintaining Malaysian SME websites, performance quietly degrades as content and images pile up. Full-size photos uploaded in a heavy format are a common part of that weight, where a WebP would be a fraction of the size.

Format is one lever, not the whole job

Choosing the right format is step one, not the finished job. A WebP saved at full camera resolution is still far too heavy for a web page.

Our image optimization guide covers the rest of the workflow: compression, correct dimensions, and delivery. Together they turn the right format into a genuinely light page, and lighter pages feed your Core Web Vitals, the loading scores Google measures. When a page still feels heavy, images are the first suspect in why a website loads slowly.

Frequently asked questions

Is JPG the same as JPEG?

Yes, they are the same format with two file extensions. JPEG stands for the Joint Photographic Experts Group that created it, and .jpg and .jpeg files are identical inside. The shorter .jpg exists because older Windows systems limited file extensions to three letters. Use whichever your software produces, since there is no quality difference between the two names.

Should I use WebP for every image?

Almost, for photographs, but not for flat graphics. WebP is the best default for photos and detailed images on a modern site, given its smaller size at the same quality. For a logo or icon, an SVG usually beats it, staying sharp at any size with a tiny file. And you keep a JPEG or PNG fallback for very old browsers. So WebP first for photos, SVG for flat graphics, with a fallback in place.

Which format is smallest?

For photographs, AVIF is usually smallest, then WebP, then JPEG, with PNG the heaviest. AVIF can be around 50% smaller than JPEG, and WebP is 25 to 34% smaller, per the figures above. But smallest is not always best, since AVIF support is still catching up, which keeps WebP the safer default. For flat logos and icons, an SVG can beat all of them, because it stores shapes rather than pixels.

Does image format affect SEO?

Indirectly, through speed. Google's image guidance asks for fast, optimized images rather than one format over another, and lighter images feed your Core Web Vitals. Google Search supports images in BMP, GIF, JPEG, PNG, WebP, SVG, and AVIF (Google Search Central, updated March 2026), so a modern format will not hurt your image visibility. Pair the right format with descriptive alt text and file names for the full benefit.

What format should my logo be?

An SVG for the website, with a PNG kept as backup. SVG holds a logo crisp at every size, from a favicon to a hero banner, at a small file size. That is why it is the web standard for logos. Keep a high-resolution PNG as well, for places that will not take SVG, such as some social platforms or documents. Avoid JPEG for a logo, since it cannot hold transparency and blurs sharp edges.

The right format is the invisible one

Storming Solutions builds custom-coded websites for Malaysian businesses from Kuala Lumpur, maintains existing sites, and runs SEO, AEO, and GEO. Picking the right image format is one of the small choices that keep a page fast without a visitor ever noticing. We would rather your logo stay sharp and your photos stay light than chase a look that takes five seconds to appear.

Not sure your images are pulling their weight? Message us about web development, or read our image optimization guide for the full workflow.