About the PNG to WebP
WebP is the image format Google created for the web: it supports transparency like PNG but files are usually much smaller, which makes pages load faster and can help Core Web Vitals. This converter turns PNG images into WebP in bulk, keeping see-through backgrounds intact, with a quality slider to balance size and sharpness. It's ideal for website images, product photos with transparent backgrounds and icons. Conversion happens in your browser; older Safari versions that can't write WebP get JPG instead, and the tool tells you.
Updated October 2026
How to use the PNG to WebP
- 1Click Select images or drop PNG files on the page.
- 2Set the quality: 80–90% is a good start.
- 3Wait while each image converts.
- 4Compare the sizes in the list.
- 5Download the WebP files or a ZIP.
Why websites use WebP
Images are usually the heaviest part of a web page. Serving WebP instead of PNG can cut the image bytes by half or more, so pages appear faster on mobile data, and tools like PageSpeed Insights stop suggesting next-generation formats. WordPress, Shopify and most website builders accept WebP uploads.
Keeping quality high
Start at 85% and compare. If edges around text or logos look soft, raise the quality. For pure logos and icons, check the size: sometimes the PNG is already smaller and you can keep it.
PNG, WebP and AVIF
AVIF can be smaller still, but browsers can't yet create AVIF files reliably, and support in older software is patchy. WebP is the safe modern choice today.
- PNG: lossless, larger, universal
- WebP: much smaller, transparency, all modern browsers
- JPG: no transparency, universal
Using WebP on your website
Upload the WebP files as you would any image. If you need to support very old browsers, use the HTML picture element with the WebP first and the PNG as a fallback.
Transparency in detail
PNG and WebP both store an alpha channel, so soft shadows and anti-aliased edges against a transparent background are kept. When the quality slider is below 100%, WebP compresses colour and transparency separately, so edges stay clean even at fairly low quality. Check a product cut-out against a dark and a light background before publishing.
Measuring the gain
The list shows each file's new size next to the original. Add up the savings across a page: if a page carries 3 MB of PNG images, WebP often brings that below 1 MB. Faster images mean visitors see your content sooner, especially on phones with weak signal.
A quick checklist before publishing
These steps avoid surprises.
- Convert one image and inspect it at 100% zoom
- Make sure your CMS or shop accepts .webp uploads
- Keep the PNG originals in a separate folder
- Update image links if file names change from .png to .webp
Phone and computer
Convert on any device. The original PNGs stay untouched on your device. For photos use JPG to WebP, and when you need the older format back use WebP to JPG.
Features
- Transparency kept
- Quality slider
- Batch conversion
- Shows the size saving
- ZIP download
- Nothing is uploaded
Frequently asked questions
Is WebP smaller than PNG?
Usually yes. Photos and screenshots often shrink by 25 to 80%. Very simple graphics with few colours can occasionally be smaller as PNG.
Does WebP keep transparency?
Yes. WebP has a full alpha channel, so transparent backgrounds stay transparent.
Do all browsers support WebP?
All current browsers display WebP, including Safari since 2020. Some older software and print services still don't accept it, so keep the PNG for those.
Which quality should I choose?
For website images, 80 to 90% looks nearly identical to the PNG. Lower values give smaller files with slight blurring.
Is the conversion lossy?
At quality below 100% WebP is lossy, like JPG. The tool uses your browser's encoder, so very high quality settings produce larger files.
Why did I get a JPG?
Some older Safari versions can't save WebP. The tool then saves JPG and shows a note; use Chrome, Edge or Firefox to get WebP.
Will the WebP have the same size in pixels?
Yes. Only the file format changes; width and height stay the same.
Can I convert WebP back to PNG?
Yes, with our WebP to JPG or Image Converter tools, but quality lost to compression doesn't come back. Keep your PNG originals.