Why convert images to WebP?

WebP files are typically 25 to 35 percent smaller than an equivalent JPG at the same visual quality, so pages load faster and use less bandwidth.

Does WebP work everywhere?

All modern browsers support WebP, and major platforms like WordPress and Shopify handle it. The main exception is email, where support is inconsistent, so keep email images as JPG or PNG.

Is WebP better than PNG?

For photographs, yes. WebP is significantly smaller at the same visual quality. For logos and graphics that need lossless compression, lossless WebP is comparable to PNG. PNG still has broader email client support.

Does WebP support transparency?

Yes. WebP supports an alpha channel for transparency, so it can replace PNG for transparent images on websites. This is one advantage WebP has over JPG, which has no transparency support.

Does converting to WebP reduce image quality?

Lossy WebP reduces quality slightly, but at standard settings the difference is invisible at normal viewing sizes. Lossless WebP conversion preserves the original quality exactly.

How to Convert PNG and JPG to WebP (Free, Locally, No Upload)

If your site feels slow, images are usually the first thing to look at. They are the heaviest part of most pages, and the easiest win is often switching them to WebP, a format built to be smaller than PNG or JPG without a visible drop in quality.

Why WebP is smaller

WebP uses more efficient compression than the older formats. In practice a photo saved as WebP lands around a quarter to a third smaller than the same image as a JPG, with no difference you can see at normal viewing size. It also supports transparency, so it can replace PNG for graphics that need a clear background. Smaller files mean faster page loads, which helps both the experience and search rankings.

Where WebP helps and where it does not

WebP is the right default for images on a website: hero images, product photos, thumbnails, and graphics. The one place to avoid it is email. Many email clients do not render WebP reliably, so images destined for a newsletter should stay as JPG or PNG. Check the requirements of any platform before converting assets for it.

How to convert to WebP locally

File Forge converts PNG and JPG to WebP inside the browser. Drop the images in, choose WebP as the output, and download the smaller versions, with nothing uploaded. Because it runs on your device, you can batch a folder of images without waiting on a server or worrying about where unreleased product shots end up.

Lossy vs lossless WebP: which one to use

WebP can be lossy or lossless. For photographs and most hero images, lossy WebP gives the biggest size savings with no visible difference at normal screen sizes. For flat graphics, logos, and screenshots with sharp edges, lossless WebP is the right call. Lossy compression blurs those hard edges slightly, which shows up as a muddy look on icons or text-heavy graphics. Lossless preserves them exactly. If you are unsure, export a test at both settings and view them at 100 percent.

Serving WebP on your website with a fallback

All modern browsers support WebP, but you can still run into issues with older email clients and some legacy environments. The standard approach is to use the HTML <picture> element: serve WebP to browsers that support it, and fall back to the original JPG or PNG for those that do not. The browser picks the format it understands and ignores the rest.

<picture>
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="Description">
</picture>

WordPress and Shopify handle WebP natively in recent versions, so for those platforms you usually just upload the WebP file and the platform manages compatibility. For email, skip WebP entirely and stick to JPG or PNG.

The takeaway

Converting site images to WebP is one of the simplest speed improvements available, and doing it locally means it is free and private. File Forge converts PNG and JPG to WebP in your browser with nothing uploaded. If you are working with file sizes after conversion, see how to compress an image to a specific file size. For creating a favicon from any image locally, see free favicon generator.