A free WebP converter that turns any image into WebP, or WebP into JPG, PNG or AVIF, in your browser, with nothing uploaded.
5.0(1 rating)Drop any images to convert them to WebP, or pick JPG, PNG or AVIF, with a score on each. It all happens in this browser.
Your images
Settings
For websites. Keeps transparency, and every current browser shows it.
No visible change. Each PNG is the smallest file that still scores 90.
Convert
Add an image to compress.
Everything happens in this browser, so your images never leave your computer. PNGs are compressed with libimagequant and OxiPNG, JPGs with Google's JPEGli, and every result is scored with SSIMULACRA 2, the quality metric from Cloudinary and JPEG XL.
This free WebP converter turns PNG, JPG, HEIC and AVIF images into WebP, or WebP images into JPG, PNG or AVIF.
It works in your browser, scores every file against its original, and uploads nothing.
Here's what WebP is, which way to convert, and what I measured.
What is a WebP converter?
A WebP converter turns images into WebP, Google's format for websites, or turns WebP images into a format an app will open.
This one starts on WebP. Pick JPG, PNG or AVIF instead to convert the other way.
To WebP or from WebP?
Convert to WebP for your website: every current browser shows it, and it's usually far smaller than PNG or JPG.
Convert from WebP when an app, a printer or an upload form won't take it. JPG opens everywhere, and PNG keeps every pixel.
What I measured
A few results from my tests, one of each way:
- Picture
- Mac screenshot
- Original
- 321 KB
- This converter
- 48 KB, score 84.9
- Picture
- Dark portrait
- Original
- 248 KB
- This converter
- 226 KB, score 76.9
- Picture
- Kodak test photo 23
- Original
- 37 KB
- This converter
- 383 KB, score 100
- Picture
- PNG transparency demonstration
- Original
- 72 KB
- This converter
- 25 KB, score 87.8
The PNG to WebP and WebP to PNG pages compare each one with CloudConvert.
How I tested
I tested on September 29, 2026. The files were the same screenshots, graphics and photos behind each conversion's own page.
The score is SSIMULACRA 2, a metric from Cloudinary that compares two pictures the way your eye does:
| Score | What it means |
|---|---|
| 90 and up | Looks identical: no difference even flicking between them at 100% |
| 80 to 90 | Same side by side at 100% |
| 70 to 80 | High quality: hard to notice without comparing |
| 50 to 70 | Medium quality: you can see it up close |
| Under 50 | Visible loss |
Who is the WebP converter for?
It's for anyone moving images in or out of WebP:
- PNG to WebP – site owners making screenshots and graphics smaller
- WebP to PNG – anyone who needs every pixel of a WebP back
- WebP to JPG – anyone whose app or form won't take WebP
- WebP compressor – anyone making WebP images smaller still
It works in your browser, and the new file leaves out hidden details like the camera and where a photo was taken.
More free image converters
Here are my other free image converters. Each one works in your browser, at full size:
- HEIC to JPG – iPhone photos that open anywhere
- WebP to PNG – every pixel kept, transparency too
- WebP to JPG – WebP images that open anywhere
- PNG to WebP – much smaller images for your site
- JPG to WebP – never bigger than your JPG
- PNG to JPG – photos up to 92% smaller
- JPG to PNG – every pixel kept, ready to edit
- AVIF to JPG – AVIF images that open anywhere
They score every file, and none upload your pictures.
Design and edit your images
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WebP Converter FAQs
Questions about the webP converter? Here's what to know.
A WebP converter turns images into WebP, or WebP images into JPG, PNG or AVIF.
This one works in your browser, with a score on every file.
Drop your images here, keep WebP, and click Convert.
Download each file, or all of them as a ZIP.
Drop your WebP images, pick JPG or PNG, and click Convert.
JPG is smaller, and PNG keeps every pixel.
Yes, WebP keeps see-through parts, and so does PNG.
JPG has none, so see-through parts get a color you pick.
Yes, it's free, with no account and no limit on files.
It runs in your browser, so it costs nothing to run.
No, the WebP converter works in your browser.
Your images never leave your computer.
Yes, drop up to 50 files at once, 50 megapixels each.
Download them one by one, or all together as one ZIP.
I did.
I'm Navid Moazzez, and the WebP converter is one of my free tools on navid.me.
Read more about me.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.
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