What this PNG to WebP converter does
PNG is a lossless format, which is why a screenshot or a logo saved as PNG can easily reach several hundred kilobytes. WebP stores the same picture with a more modern compression method, and for most web images the file ends up far smaller. This page takes the PNG files you select, re-encodes each one as WebP with the quality you choose, and hands the results back to you for download.
Everything happens on your device. The page reads the file, draws it onto an off-screen canvas and asks your browser to save that canvas as WebP. No image is sent to a server, which makes it safe for client artwork, product photos and unreleased designs. Transparent areas of the PNG stay transparent in the WebP file.
The tool was built for people who publish on the web: bloggers who want lighter posts, shop owners who need quicker product pages, and developers who have a folder of assets to prepare before launch. If you need other formats as well, the Image Converter handles AVIF, JPG and PNG output.
How to use the PNG to WebP Converter
- Add your PNG files by dropping them on the box or tapping Choose files. You can add up to 20 at once.
- Check the thumbnails and file sizes in the list. Remove anything you added by mistake.
- Move the Quality slider. Start at 85. If the result looks soft, go higher; if the file is still large, go lower.
- Enter a Max width only if you want to shrink the dimensions too, for example 1600 for a blog hero image.
- Press Convert to WebP. Each row now shows the new size and how much smaller it is.
- Use Download beside a single image, or Download all as ZIP to save the whole batch in one file.
What you get
- Batch conversion of up to 20 PNG files with a one-click ZIP download.
- Adjustable quality from 10 to 100 and optional resizing by width.
- Transparency is kept, so logos and cut-out product shots still sit cleanly on any background.
- Before and after file sizes for every image, so you can see exactly what you saved.
- No sign-up, no watermark and no upload. It works offline once the page has loaded.
When it comes in handy
- Preparing blog images and featured pictures so articles open faster on mobile data.
- Shrinking product photos for an online store without visible loss.
- Replacing heavy PNG icons and banners in a website theme.
- Reducing screenshots before attaching them to documentation or support tickets.
- Getting a folder of design exports ready for a performance audit.
PNG and WebP at a glance
| PNG | WebP | |
|---|---|---|
| Compression | Lossless only | Lossy or lossless |
| Transparency | Yes | Yes |
| Typical file size | Large for photos and gradients | Usually much smaller than the same PNG |
| Browser support | Universal | All current browsers |
| Best for | Editing masters, tiny icons | Published web images |
For a deeper comparison, read our guide on PNG vs WebP.
Tips for better results
- Keep your original PNG as an editing master. Convert copies, not the only version you own.
- Photographs and gradients shrink the most. Flat icons with few colors shrink less, and tiny files can occasionally grow.
- Resize before you compress. A 4000 pixel wide image shown at 800 pixels wastes bytes whatever the format.
- Give files descriptive names such as
blue-ceramic-mug.webpand write alt text in your page. - Compare one converted image against the original on a real page before converting the whole library.
Frequently asked questions
Is this PNG to WebP converter really free?
Yes. There is no account, no daily limit and no watermark. You can convert as many batches as you like.
Are my PNG files uploaded anywhere?
No. The conversion runs entirely inside your browser tab, so the images are never transmitted to our server or anyone else. You can even disconnect from the internet after the page loads and it will keep working.
Will the transparent background survive?
Yes. WebP supports an alpha channel, and the converter keeps the transparency of your PNG. If you later convert to JPG, transparency is lost because JPG has no alpha channel.
Why is my WebP file bigger than the PNG?
It happens with very small or very flat images, such as a two-color icon that PNG already stores efficiently. Lower the quality slider, or keep the original PNG for that particular file.
What quality setting should I choose?
For photos, 80 to 90 is a safe range and the difference from the original is hard to see. For graphics with fine text, try 90 to 100. Always check one result before processing a large batch.
How many images can I convert at once?
Up to 20 PNG files per batch, each up to 25 MB. If you have more, finish one batch, download the ZIP and start another.
Which browsers can create WebP files?
Current versions of Chrome, Edge, Firefox and Opera can. Some Safari versions cannot encode WebP from a canvas; if you see an error message, open the page in another browser.
Can I convert WebP back to PNG?
Yes. Open the Image Converter, add the WebP file and choose PNG as the output format.
More from our network
Want a second option? Our sister site UseTools.in also offers an online image converter for WebP, AVIF, JPG and PNG, plus a wider range of free online tools.