PNG to WebP Converter

Convert PNG graphics, screenshots and photos to WebP. Files get much smaller and transparent areas stay transparent.

PNG → WebPTransparency kept Runs on your device

PNG to WebP · Step 1 of 3 · Add your photo

Drop images to convert

or paste with Ctrl+V · JPG PNG WebP HEIC GIF · max 25 MB

→ WebPBatch ready

Processed on this device. Nothing is uploaded.

Example

Before and after

We ran this sample through the png to webp tool above. The numbers under each image are measured from the real files.

Sample input: 1200 x 1200 px · 33.8 KB · PNG — **Before**1200 x 1200 px · 33.8 KB · PNG

Result from this tool: 1200 x 1200 px · 17.4 KB · WebP — **After**1200 x 1200 px · 17.4 KB · WebPThe actual file the tool made

Sample made by the SizePort team, not a real document.

How to

How to convert PNG to WebP

1.
Drop your PNG files. You can add many at once.
2.
Convert. Transparent areas stay transparent.
3.
Download. Save each WebP, or all of them as a ZIP.

Why this size

PNG vs WebP on a website

PNG is lossless and often heavy: a full-width screenshot or a product photo saved as PNG can weigh several MB. WebP keeps transparency like PNG but stores the image far more efficiently, so the same graphic usually becomes a fraction of the size.

This converter saves WebP at a high quality setting, which is right for the web. Keep the PNG original for further editing, where every pixel matters.

Compare

PNG vs WebP: what changes when you convert

	PNG	WebP
Best for	Logos, screenshots, transparency	Websites and apps
Compression	Lossless	Lossy or lossless
Typical photo size	4-8 MB	200-700 KB
Transparency	Yes, kept	Yes, kept
Accepted by forms	Usually	Sometimes

Tips

Tips that make a difference

Convert to WebP when

You publish images on a website and want them to load faster.

Keep PNG when

The image has a transparent background or sharp text, like a logo or a screenshot.

Convert a whole folder

Drop all your PNG files at once. Each one becomes a WebP with the same name, and you can download them together as a ZIP.

Avoid

Common problems and fixes

Fine text looks a little softThe WebP is saved at high quality but not losslessly. Keep the PNG when every pixel must stay exact.
The file is still largeVery large images stay heavy in any format. Resize to the width your page shows before converting.
An app does not show the imageOlder apps may not support WebP. Keep the PNG original for them.

FAQ

PNG to WebP: questions

Yes. Transparent backgrounds stay transparent in the WebP.

Photos often shrink by 70 to 90%. Flat graphics and screenshots shrink less but are still noticeably lighter.

No. It is saved at high quality, which looks the same on screen. Keep the PNG if you need a pixel-perfect copy.

Up to 25 MB per image. Add up to 5 files at once, or 50 with a free account.

No. Conversion runs in your browser, so your images never leave your device.

Checked

How we checked this page

Checked by the SizePort team on 3 October 2026.

We compare every size and rule on this page with the official sources below, and test the tool with sample photos before it goes live. Rules and platforms change, so if something here is out of date, tell us and we will correct it.

How the tool works

The image is decoded in your browser and saved again in the new format at a high quality setting. PNG and WebP keep transparent areas; JPG and GIF get a white background. A JPEG converted to JPG without a size limit keeps every byte and only changes the file name. Everything happens in your browser; your images are never uploaded.