PNG to WebP Converter: Faster Web Images

Convert PNG to WebP to make images for your website, online store or blog load faster. PNG files are often heavy, especially screenshots and product photos. WebP usually stores the same picture in a much smaller file, and current versions of all major browsers display it.

FileKiwi converts your PNG files right in the browser, keeps transparency, and lets you tune quality before you download.

How to use PNG to WebP

Add PNG images

Drag your .png files in, or tap to choose them. Add a whole folder of site images at once.

Set WebP quality

Start with the default 92%. For large photos, try 75% to 85% and compare the result.

Download WebP

Save files individually or as one ZIP, then upload them to your website or CMS.

Why use FileKiwi for this

Lighter pages

Smaller images mean less data to download, which helps page speed, especially on mobile networks.

Transparency kept

Logos and cutout product shots keep their transparent backgrounds in the WebP version.

Converted locally

Files are processed in your browser, so unpublished product images and designs stay private.

Batch ready

Convert dozens of images in one go and download them as a ZIP for easy upload.

Why use PNG to WebP for your website?

Image weight is one of the biggest reasons pages feel slow. Faster pages are nicer for visitors and support good Core Web Vitals, which Google looks at as part of page experience.

WebP was designed by Google for the web. It can be lossy like JPG or lossless like PNG, and it supports transparency and animation. That makes it a practical replacement for both formats on most sites.

Keep your original PNG files as masters. Upload the WebP copies to your pages.

A simple workflow for a store or blog: export images from your editor as PNG, run the batch through FileKiwi, check a few results at full size, then replace the old files. Remember to update image links in your pages if the file endings change from .png to .webp.

Getting the best size and quality

Photos and product shots: a quality around 80% usually looks great and saves the most space.
Screenshots with text: keep quality high, around 90% or more, so small letters stay clean.
Huge dimensions: a 5000 pixel wide image is far bigger than any screen needs. Use Resize Image first, then convert.

Always compare before and after. If a WebP looks soft, raise the slider a little and convert again. Open the WebP in your browser at full size to judge it fairly.

Where WebP may not fit

WebP is great on the web but less ideal for files you send to people. Some older desktop apps, print services and upload forms still do not accept it.

For those cases, keep a JPG or PNG copy. You can always switch back with WebP to PNG or WebP to JPG.

WordPress, Shopify and most modern site builders accept WebP uploads, but check your platform settings or theme if an upload is refused.

PNG to WebP: frequently asked questions

Is PNG to WebP conversion lossless?

FileKiwi saves WebP with a quality slider, so the result is usually lossy, like a very efficient JPG. At high settings the difference is hard to see. Keep your PNG originals if you need a perfect master copy.

Does WebP keep transparency from PNG?

Yes. WebP supports transparent backgrounds, so logos, icons and cutout product photos convert with their clear areas intact. You can place them on any colored page section.

How much smaller is WebP than PNG?

It varies a lot by image. Photos and detailed screenshots often shrink dramatically, while tiny icons with few colors may change only a little. Convert a sample and compare the sizes shown.

Do all browsers support WebP?

Current versions of Chrome, Edge, Firefox, Safari, Opera and Samsung Internet all display WebP. Only very old browsers and some older desktop apps lack support.

Will WebP help my SEO?

Indirectly. Smaller images help pages load faster, and speed is part of the page experience Google considers. WebP alone will not lift rankings, but it removes one common performance problem.