ImageConverter

What Is WebP? The Web Image Format, Explained

WebP is Google's image format for the web, shipped in 2010. It compresses photos 20–30% smaller than JPG at the same visual quality, supports lossless mode, animation and transparency. Every modern browser renders it — but half the software world still trips over it.

Quick answer: WebP is an image format Google created to make web pages faster. It is 20–30% smaller than JPG at equal quality and supports transparency and animation. All current browsers display it, which is why sites serve it — but older apps, Office versions and many upload forms cannot open it, so converting WebP to JPG or PNG is a common fix.

What WebP is

WebP is a raster image format announced by Google in 2010, built on the VP8 video codec's intra-frame compression. It offers three modes: lossy (like JPG), lossless (like PNG, but smaller) and animated (like GIF). One format covering all three is its core selling point for websites.

Why websites serve WebP

Images are most of a typical page's weight. Serving WebP instead of JPG cuts that weight by a quarter or more with no visible change — faster load times, better Core Web Vitals scores, lower CDN bills. Since Safari gained support in 2020, every browser renders WebP, so sites have no reason not to serve it. When you right-click and save an image today, what lands in your Downloads folder is whatever the site delivered: usually WebP.

Where WebP breaks

  • Windows Explorer handled it poorly before Windows 11 — preview thumbnails and previews fail on Windows 10
  • Older editors and Office versions cannot import it
  • Upload forms, print services and marketplaces whitelist JPG/PNG only
  • Messaging apps and forums sometimes reject it as an attachment
  • Screenshot-adjacent workflows break when the saved file is not what previews show

How to convert WebP

The browser decodes WebP natively, which makes local conversion trivial: a page like our WebP to JPG converter redraws the decoded image onto a canvas and re-encodes it as JPG or PNG without any upload. For the opposite direction — optimizing site images — our JPG to WebP converter does the same in reverse, in bulk, at a quality you choose.

Should you convert to WebP or away from it?

Both, depending on direction: WebP is the right target for images going onto a website (smaller, faster), and the wrong format for images going into old software, forms or print. Keeping a local converter handy for both directions covers the whole lifecycle.

Frequently Asked Questions

Is WebP better than JPG?
For the web, yes: 20–30% smaller at equal quality, plus transparency and animation support. For compatibility with old software, JPG wins. They serve different masters.
Why did my saved image become .webp?
The site served WebP to your browser and you saved what was delivered. Ask for JPG by using the site's original asset URL, or just convert the file locally — faster and always works.
Can I stop browsers saving WebP?
Not reliably. Some extensions rewrite request headers, but sites can ignore them. Converting after saving is the robust fix.
Does WebP support transparency?
Yes — both lossy and lossless WebP support alpha channels. When converting to JPG, which lacks alpha, transparent regions get flattened to white.

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