PNG to WebP Converter
Shrink a PNG into a WebP and keep the transparency. Choose lossless or lighter, then download.
Drop a PNG file here
Up to 4.0 MB per file. Converted in your browser, never uploaded.
Free PNG to WebP
Converter, Online
WebP is the rare upgrade with no catch for graphics: it keeps your transparent background, and lossless WebP runs about 26% smaller than the same PNG. Perfect for logos, screenshots, and UI assets headed for a website.
Tools that pair well with this one
All free, all in your browser, no signup.
How to convert PNG to WebP
Three steps, no account, and a 4.0 MB ceiling per file.
Add your PNG
Drag it in or pick it from your device. Only PNG files are accepted here.
Hit Convert
WebP is preselected. Open the settings first if you want to change the quality.
Download the WebP
The converted file is ready straight away. Save it and carry on.
The short version
Why convert PNG to WebP?
For anything with a transparent background that lives on a website, WebP does the same job as PNG in a smaller file.
This is the conversion where you genuinely give nothing up. WebP supports alpha transparency in both its lossy and lossless modes, so a logo, an icon, or a UI screenshot converts without a white box appearing behind it.
- Logos and icons on a site: Transparency intact, roughly a quarter off the file size at 100% quality, no visual difference at all.
- Long screenshots and UI mockups: Large flat-color PNGs are exactly what WebP's lossless mode is best at.
- Anything you are lazy-loading: Lighter files finish downloading sooner, which is the entire point of the exercise.
Worth knowing: Use 100% quality for logos, icons, and anything with text or hard edges. That is where your browser encodes WebP losslessly, so the result is pixel-identical to the PNG. Below 100% the transparency still survives, but the pixels are approximated, and approximation is exactly what sharp edges cannot hide.
Portable Network Graphics
What is a PNG?
PNG is the lossless one. What goes in comes back out pixel for pixel, however many times you open and re-save it, and it carries real transparency.
It was built in 1996 as a patent-free answer to GIF, and it inherited GIF's best trick while fixing its worst limit: PNG supports a full 8-bit alpha channel, so a logo can sit on any background with soft, properly anti-aliased edges instead of a jagged cutout.
Because nothing is discarded, PNG is the safe container for images made of flat color and hard edges: screenshots, UI mockups, charts, diagrams, line art, and any graphic with text in it. Those are exactly the images JPG mangles.
The price is size. On a detailed photograph a PNG can easily be five to ten times larger than the equivalent JPG, because photographic noise is the worst possible input for lossless compression.
Best for: Screenshots, logos, diagrams, anything with text, and any image that needs a transparent background.
Web Picture format
What is a WebP?
WebP is Google's attempt to stop making people choose. It has a lossy mode like JPG, a lossless mode like PNG, and transparency in both, all in one file type.
Google's own comparisons put lossy WebP at roughly 25 to 34% smaller than a JPG of comparable quality, and lossless WebP at about 26% smaller than PNG. On an image-heavy page that is the difference between a fast Largest Contentful Paint score and a slow one.
Browser support stopped being an argument years ago. Chrome, Edge, Firefox, Opera, and Safari from version 14 onward all render WebP, which covers effectively everyone who will visit your site.
Where it still trips people up is off the web. Plenty of desktop software, older photo tools, print workflows, and a few upload forms will refuse a .webp file outright, which is the usual reason someone needs to convert one back.
Best for: Images you are publishing on a website, where page weight is the thing you are optimizing.
Other PNG and WebP converters
Same tool, same privacy, different formats. Pick the conversion you need next.
Everything the PNG to WebP conversion needs, nothing it does not.
One file, two dropdowns, one button. The rest is your browser doing the work.
Converts in a blink
Your browser decodes and re-encodes the file locally, so a PNG becomes a WebP in about as long as it takes to read this.
Never leaves your device
No upload, no server, no copy of your image sitting in someone's bucket. Close the tab and it is gone.
You pick the quality
Default is 75%, which keeps files small. Push it to 100% when the detail matters more than the size.
Transparency survives
Both PNG and WebP carry an alpha channel, so transparent backgrounds cross over untouched.
No install, no signup
It is a web page. Nothing to download, no account to make, no watermark on the way out.
Works on your phone
Same tool, same speed on mobile. Convert a screenshot on the train and download it straight to your camera roll.
PNG to WebP: common questions
What people ask before converting PNG files to WebP.
Drop your PNG file into the converter at the top of this page, or click the button to pick one. WebP is already selected as the output, so you can hit Convert straight away.
When it finishes, the download button appears with the converted file. There is no queue, no email step, and no account.
Yes. WebP has a full alpha channel in both its lossy and lossless modes, so transparent backgrounds convert across untouched. This is the main reason PNG to WebP is a better trade than PNG to JPG, which flattens transparency to white.
It can be. WebP has both modes. Set quality to 100% in the settings here and your browser encodes losslessly, giving you a pixel-perfect copy of the PNG in a file that is typically around 26% smaller. Anything below 100% is the lossy mode, which is fine for photos and unkind to sharp edges.
No. The conversion runs inside your browser using the canvas your browser already ships with. Your file is read from your own device, converted in memory, and handed back to you.
Nothing is transmitted, which means nothing can be stored, logged, or leaked. It also means the tool keeps working if your connection drops halfway through.
4.0 MB per file. Above that, converting in the browser gets memory-hungry enough to crash the tab on a mid-range phone, so the tool declines the file rather than gambling with it.
If your image is larger, compress or resize it first and then convert it here.
Yes. The gear icon next to the Convert button opens the quality control, which starts at 75%. That is the setting where files stay small and the difference stays invisible on a photograph.
Set it to 100% and your browser encodes WebP losslessly, which is what you want for logos, screenshots, and anything with text.
Yes. No signup, no watermark, no daily limit, and no ads on the page. Since the work happens on your device, converting an image costs us nothing to run, so there is nothing to charge you for.
Ready to convert your PNG?
Drop it in, pick WebP, download. No account, nothing uploaded.