Convert PNG to WebP in seconds with this free, browser-based tool. WebP is Google's modern image format, and for most images it produces files 25–35% smaller than PNG at the same visual quality.
Because every image is processed locally on your device, nothing is uploaded to a server. Your photos and screenshots never leave your computer.
How to use this tool
Add your image
Drag and drop a PNG (or any other image) onto the tool, or click the button to choose a file from your computer.
Adjust the quality
The tool opens with WebP pre-selected. Move the quality slider to balance file size against image quality — 75% is a good starting point.
Compare before and after
Use the side-by-side comparison to check the compressed result before you commit.
Download your WebP
Hit download and your converted file is saved. WebP is fully supported in Chrome, Firefox, Safari, and Edge.
What actually changes when you convert PNG to WebP
PNG is a lossless format built for flat colour: screenshots, diagrams, logos, interface mockups. WebP can do lossless too, but its real advantage is that it can also do lossy compression — and for anything photographic, that is where the size win comes from. The same photograph typically lands 25–35% smaller as a lossy WebP than as a JPEG, and the gap against a PNG is far larger.
The important detail is that the conversion is a one-way decision. WebP lossy discards information that cannot be recovered by converting back to PNG later. If the image is a screenshot with text in it, the loss shows up first on the letter edges.
Lossless or lossy: which to pick
- Text, UI screenshots, line art, logos — use WebP lossless. You typically still save 20–30% against the PNG with no visible change at all.
- Photographs and scanned images — use WebP lossy. The saving is much larger, and the artefacts are far less visible on continuous-tone content.
- Anything you will edit again — keep the PNG. Convert a copy for delivery and leave the master alone.
When to keep PNG instead
- You need a format that every tool and platform accepts without question — PNG has universal support, WebP does not.
- The image has fine monochrome detail such as a screenshot of source code or a one-pixel grid, where lossy compression is most visible.
- You are producing an asset for print or for a desktop application, where the browser support argument does not apply.
Frequently asked questions
Is WebP smaller than PNG?
For photographs and complex images, WebP is typically 25–35% smaller than PNG at the same quality. For simple flat graphics, the savings can be even larger.
Is PNG to WebP lossy?
It depends on the settings. At quality 75–90 the difference is nearly invisible to the human eye. You can also use lossless WebP, which compresses without any quality loss.
Do you upload my images to a server?
No. Every image is processed locally in your browser. Your files are never uploaded anywhere.