Is WebP better than JPG?

For images served on a website, yes: 25 to 35% smaller at the same visual quality, with transparency if you need it. For anything that leaves the browser, such as email, print, documents, or upload forms, JPG is the safer choice because everything accepts it.

Does converting JPG to WebP lose quality?

Both formats are lossy, so converting re-encodes the image once more. At a sensible quality setting the loss is not visible. Convert from the original JPG rather than from a previously converted copy, and keep the original.

Why won't my WebP image upload?

The site only accepts formats on its list, usually JPG and PNG. Convert the file with WebP to JPG in your browser and upload the result. The guide on WebP files that won't open covers the other common cases.

Which is better for photos on a website, JPG or WebP?

WebP, with a JPG fallback only if you must support browsers from before 2020. Modern build tools and CDNs can serve WebP to browsers that support it and JPG to the rest automatically.

JPG vs WebP: Which Is Better?

By Rehan Shah, Updated September 17, 2026, Published August 27, 2026

For photos on the web, WebP is simply the better JPG: same picture, quarter to a third fewer bytes. Off the web, the answer flips. This guide draws the line.

The one-sentence answer

WebP for anything served on a website; JPG for everything that leaves the browser: email, documents, print, uploads to systems you don't control.

The size difference, quantified

Both formats are lossy, but WebP's encoder is a generation newer: at equal visual quality, photos come out 25-35% smaller. One photo, minor. A gallery, a product catalog, a page with a dozen images: the savings compound into visibly faster loads and better Core Web Vitals scores.

Side by side

	JPG	WebP
Photo size at equal quality	Baseline	25-35% smaller
Transparency	No	Yes
Browser support	Universal	All modern browsers (since 2020)
Email, Office, print, kiosks	Reliable	Frequently unsupported
Upload forms & portals	Accepted everywhere	Sometimes rejected
Best role	Interchange & delivery outside the web	Web delivery

The compatibility catch

Browsers all read WebP; the rest of the world is slower. Printers and photo kiosks, government and job portals, older Office versions, and plenty of email clients still expect JPG. That's why images saved from websites, which arrive as WebP, so often need converting back to JPG before they'll upload anywhere.

Practical workflow

Keep originals as JPG (or RAW), convert delivery copies with JPG to WebP for your site, and convert web-saved images back with WebP to JPG when a form or app refuses them. Since both formats are lossy, avoid ping-ponging the same file repeatedly: each round trip costs a little quality.

Quality numbers do not mean the same thing

A JPG saved at quality 80 and a WebP saved at quality 80 are not the same quality. Each format's scale is its own, so the way to compare them is by eye or by file size at a level that looks equivalent. In practice a WebP around 75 to 80 looks like a JPG around 80 to 85 and is a quarter to a third smaller. When you convert, judge the result on screen at 100% rather than trusting the number to carry over.

There is one place lossy WebP shows its seams sooner than JPG: fine, high-contrast detail such as small text in a screenshot or a thin logo on a flat colour. If that is what you are compressing, either keep the quality high or use PNG for that image and WebP for the photos.

Where WebP still gets rejected

Upload forms on government, job, and marketplace sites that whitelist .jpg and .png.
Older desktop software, including some Office versions and image editors that predate 2020.
Photo printing services and kiosks, which expect JPG almost without exception.
Email clients that display a WebP attachment as a generic file rather than a picture.
Messaging apps that re-encode images; some convert WebP, some refuse it.

What about AVIF?

AVIF is the format after WebP: smaller again for photos, with broad browser support since 2023, but even less support outside browsers and slower to encode. The same logic applies one step further out. Use it on a website where you control the fallbacks; convert it to JPG the moment it has to leave the browser. If you have saved an AVIF from a site and nothing opens it, AVIF to JPG handles it the same way.

Common questions

Is WebP better than JPG?: For images served on a website, yes: 25 to 35% smaller at the same visual quality, with transparency if you need it. For anything that leaves the browser, such as email, print, documents, or upload forms, JPG is the safer choice because everything accepts it.
Does converting JPG to WebP lose quality?: Both formats are lossy, so converting re-encodes the image once more. At a sensible quality setting the loss is not visible. Convert from the original JPG rather than from a previously converted copy, and keep the original.
Why won't my WebP image upload?: The site only accepts formats on its list, usually JPG and PNG. Convert the file with WebP to JPG in your browser and upload the result. The guide on WebP files that won't open covers the other common cases.
Which is better for photos on a website, JPG or WebP?: WebP, with a JPG fallback only if you must support browsers from before 2020. Modern build tools and CDNs can serve WebP to browsers that support it and JPG to the rest automatically.

Try it yourself

These live under Image tools, alongside the rest of the image formats explained guides on the guides page.