Image

WebP vs JPG: Which Is Better?

Dev Nexus4 min read

A practical comparison of WebP and JPG on size, quality, transparency, and browser support - and how to convert between them.

WebP and JPG both compress images to keep files small, but they are not the same. WebP is the newer format, built by Google to shrink web images further than JPG can. JPG has been the default for photos for decades and opens absolutely everywhere.

This guide compares the two on the things that actually matter - file size, quality, transparency, and browser support - so you can pick the right one, and shows how to convert between them when you need to.

The Problem

It is easy to reach for JPG out of habit, but that can cost you. Serve large JPGs and your pages load slowly, hurting user experience and search rankings. Serve WebP blindly and a handful of users on old software may see broken images instead.

The question is not which format is universally best - it is which one fits a given image and audience. Without a clear comparison, you end up guessing, shipping bloated files, or spending time re-exporting images in a heavy editor.

The Solution

Here is the short version. WebP produces smaller files than JPG at the same quality - often undefined to undefined percent smaller - and, unlike JPG, it supports transparency and animation. JPG wins on universal compatibility: every browser, app, and device made in the last undefined years opens it without question.

For the modern web, WebP is usually the better default, with a JPG fallback for legacy clients. For maximum compatibility - email attachments, old software, print workflows - stick with JPG. Whichever you choose, the Image Converter turns one into the other locally in your browser, and Compress Image trims the result further.

Step-by-Step Guide

1
Compare file size
At matched quality, WebP is typically undefined to undefined percent smaller than JPG, and often more for detailed photos. On an image-heavy page, that difference directly improves load time and Core Web Vitals.
2
Compare quality
Both are lossy, so both discard detail to save space. At the same file size, WebP usually looks as good or better than JPG, with fewer blocky artifacts in smooth gradients and skies.
3
Check transparency and animation
WebP supports an alpha channel and animation; JPG supports neither. If you need transparency, WebP (or PNG) is the only option between these two.
4
Check browser and app support
WebP is supported by all modern browsers. JPG is supported by literally everything. If your audience includes old email clients or legacy apps, JPG or a fallback is safer.
5
Convert as needed
Use the Image Converter to go from JPG to WebP for smaller web files, or WebP to JPG when a tool refuses WebP. The conversion runs locally with nothing uploaded.

Common Mistakes

Using JPG for graphics with transparency
JPG cannot store transparency and fills it with a solid colour. For logos or icons that need a transparent background, use WebP or PNG, not JPG.
Serving WebP with no fallback
A small share of users still run software that cannot open WebP. Serve WebP to modern browsers and fall back to JPG or PNG so no one sees a broken image.
Re-saving JPG to WebP repeatedly
Both formats are lossy, so converting an already-compressed JPG to WebP stacks compression artifacts. Convert from the highest-quality original whenever you can.
Judging quality by numbers alone
A quality value of undefined does not mean the same thing in JPG and WebP. Compare the actual output at your target size rather than trusting the slider label.

Frequently Asked Questions

Is WebP better than JPG?

For the web, usually yes - WebP produces smaller files at similar quality and supports transparency and animation. JPG still wins on universal compatibility with older software.

Does WebP lose quality compared to JPG?

Both are lossy formats. At the same file size, WebP typically looks as good or better than JPG, with fewer visible artifacts in gradients and smooth areas.

Can WebP have a transparent background?

Yes. WebP supports an alpha channel, so it can store transparency like PNG. JPG cannot - it fills any transparent area with a solid colour.

Do all browsers support WebP?

All modern browsers support WebP. Some older apps and email clients do not, so keep a JPG or PNG fallback if your audience includes legacy software.

How do I convert between WebP and JPG?

Use the Image Converter. Add your file, pick JPG or WebP as the output, and download the result. It runs in your browser with nothing uploaded.