WebP vs JPG: Which Format Should Your Website Use, and When to Convert

Key takeaways

• Keep WebP for pictures that sit on your website. Google says lossy WebP files are 25 to 34% smaller than comparable JPEGs, so pages carry less weight. Checked 3 November 2026.
• Convert to JPG when the picture leaves your site. Email attachments, print shops, older software and upload forms that list only JPG and PNG are the usual reasons.
• Convert to PNG when you need clear areas to stay clear. A logo with a see-through background loses that in a JPG, which has no way to keep it.
• Browsers are no longer the problem. Can I use shows 97.18% global support for WebP on 3 November 2026. The trouble now is software and forms outside the browser.
• Keep the original as your master. Each lossy save loses a little detail that a copy cannot get back.
• Keep vector art as SVG. Turn a logo or icon into JPG or PNG only for places that refuse SVG.

The short answer

Use WebP when a browser will show the picture. Use JPG or PNG when a person, a printer or a piece of software outside the browser must open it.

That rule settles most cases. If you only want to switch files, our free tools do it in the page: WebP to JPG, WebP to PNG, SVG to JPG and JPG to WebP.

What WebP and JPG each do well

JPG is the old reliable format for photos. Every browser, phone, email app and print shop opens it. It uses lossy compression and cannot hold a see-through background.

WebP is a newer format made by Google. According to Google's WebP page, lossy WebP is 25 to 34% smaller than comparable JPEGs and lossless WebP is 26% smaller than PNG. It can also hold transparency and animation. MDN gives a similar figure, 25 to 35% for lossy WebP against JPEG, and tells developers to prefer WebP or AVIF for raster images on the web. WordPress describes WebP files as around 30% smaller on average when it added support in version 5.8. All three pages were read on 3 November 2026.

Treat those figures as typical, not promised. The saving depends on the picture and the quality you pick.

The roles come from MDN and web.dev's format guide, read 3 November 2026. The last column is our plain summary.

Browser support and platform limits

On the browser side the question is nearly closed. Can I use reports 97.18% global support for WebP on 3 November 2026, with full support from Chrome 32, Edge 18, Firefox 65 and Safari 16. Safari 14 to 15.6 had partial support.

That leaves roughly 3 in 100 visitors who may not see a WebP file. To cover them, use the picture element that web.dev and MDN both show: the WebP first, then a normal image tag with a JPG.

In plain terms: put the WebP file in a source tag with the type image/webp, and keep an ordinary img tag with the JPG inside the same picture element. Browsers that know WebP take the first, the rest fall back to the second.

Platforms are a second question. Here is what we confirmed from the maker's own page on 3 November 2026.

The Shopify limits come from Shopify's product media page. The pixel sum checks out: 5000 times 5000 is 25,000,000. Before you upload hundreds of files, read the platform page again, because limits change.

What the format does to site speed

Pictures are often the heaviest part of a page. A smaller file downloads sooner, and on a weak phone signal that gap is large.

Here is a plain example, not a measurement. A hero photo saved as a 200 KB JPG would come out around 130 to 150 KB as WebP if the 25 to 35% range holds, since 200 times 0.65 is 130 and 200 times 0.75 is 150.

Format is only one of four things that change picture weight:

1. Pixel size. A photo shown 800 pixels wide does not need to be 4,000 pixels wide. This often saves more than changing format.
2. Quality setting. Small drops in quality save a lot of bytes and are hard to see.
3. Format. WebP over JPG, as above.
4. Loading behaviour. Lazy-load the pictures below the fold, never the main hero. Our guide to speeding up a small site puts these in order of payoff.

web.dev points out that an image is often the Largest Contentful Paint element, so its file size affects how fast the page feels loaded. It gives no fixed figure for what a format change is worth, and neither do we. The honest way to know is to measure your own page before and after. Our website audit checklist lists the checks, and mobile website design covers why phones feel it first.

The decision table: keep WebP, or convert?

How to convert, and what each of our tools does

All four pages below run in your browser. We read their own pages on 3 November 2026 and describe only what they say.

• WebP to JPG. Quality runs from 40 to 100 and starts at 90. A size menu limits the longest side. Because a JPG cannot keep clear areas, you choose white or black to fill them. An animated WebP becomes one still picture from its first frame. The page says files are decoded and saved inside the page and do not leave your device.
• WebP to PNG. There is no quality slider, because the PNG is written without one. See-through areas stay see-through. The page warns that a PNG made from a WebP can be larger than the file you started with, so check the size before it goes back on a live page.
• SVG to JPG. You pick a width from 16 to 8000 pixels, a quality and a background. The height follows the drawing. The page sets no file size limit of its own, though a very complex drawing may take longer to draw.
• JPG to WebP. The other direction, for the site itself. It offers a quality slider or lossless, a size limit, and shows the size before and after for each file. The page itself says to keep the JPG if the new file is not smaller.

All four let you add one file, many files or a folder, and give back single downloads or a ZIP.

For a clean conversion, keep the original in its own folder, try one or two pictures before a batch, pick the size before the quality, and always convert from the original. Converting does not add detail: a heavily compressed WebP becomes a heavily compressed JPG.

When to keep the WebP, and when this advice does not apply

Keep WebP if the file lives on your website and your visitors use current browsers.

Keep the JPG if it is already small, if a printer or a person with older software will open it, or if the WebP version does not come out smaller.

This guide does not apply in a few cases:

• Logos and icons drawn as vectors. Keep the SVG on the page. MDN says to prefer the SVG version of an icon.
• Sites that already convert for you. Some platforms and plugins serve WebP automatically. Check before you add a second layer.
• AVIF. MDN says AVIF can compress slightly better than WebP, but WebP is better supported. Treat it as a later step, not a first one.

If pages feel slow, the cause is often an oversized hero, a heavy video or a script, not the file extension. Our guide to why a site is not converting shows how speed ties to results, and the SEO checklist for a redesign covers renaming image files without losing search value.

How we help at Amariq

We size each picture for the place it appears, choose WebP where it helps, keep a JPG or PNG ready for email and print, and use SVG for logos and icons. On Webflow, Framer, WordPress and Shopify, we also check what the platform converts by itself, so you do not pay twice for the same job.

If your site already exists and feels heavy, our website optimization service looks at pictures, scripts and layout together. Pricing comes from scope, never by the hour, and you own the design, copy and code after the final payment.

Frequently asked questions

Is WebP better than JPG?

For pictures shown in a browser, usually yes, because the file is smaller at similar quality. Google puts lossy WebP at 25 to 34% smaller than comparable JPEGs. For email, print and older software, JPG is still the safer file.

Why will a site not let me upload my WebP?

Some forms, document tools and older editors only list JPG and PNG. Convert the file with a WebP to JPG or WebP to PNG page and try again.

Does converting WebP to JPG lose quality?

A little, yes. Both formats are lossy for photos, so a second save adds a small loss. Keep the original WebP for another copy.

Can I turn a WebP with a clear background into a JPG?

You can, but the clear parts must be filled with a colour, because JPG cannot hold them. White suits most pages. If the logo is white or pale, fill with black. For true transparency, convert to PNG instead.

Is a PNG made from a WebP bigger?

It can be. PNG is lossless, and our WebP to PNG page warns that the result may be larger than the original. Check the file size before it goes on a live page.

Should I convert all my site images to WebP?

Often yes, for photos, if your platform accepts WebP and you keep the originals. Try a few first. If a result is not smaller, keep the JPG. Our JPG to WebP page shows the sizes before and after.

Do I need a JPG fallback on my site?

With 97.18% global support on 3 November 2026, many sites go without one. If you want to cover very old browsers, use the picture element shown above.

What happens to an SVG when I turn it into a JPG?

The drawing is painted at the width you choose and saved as flat pixels. It loses sharpness at large sizes and its clear areas take your chosen colour. Keep the SVG as the master. If image work is part of a bigger refresh, our website redesign cost guide shows where it sits in the budget.