Convert PNG to WebP instantly

Convert PNG to WebP in your browser. 50-70% smaller files. No server upload. Free and private.

Drop your PNG file here

or click to browse

Conversion Settings
Output Quality
Your files stay private
No server upload
Instant conversion

 

Example

Input (PNG)

[graphic.png]
A 800x600 PNG graphic
File size: 450 KB

Output (WEBP)

[graphic.webp]
Optimized WebP image
File size: 180 KB (typically 50-60% smaller)

About this converter

PNG files are lossless and often huge. A single screenshot can be 2-5 MB. WebP compresses dramatically better, typically producing files 50-70% smaller while still looking nearly identical. For websites, switching from PNG to WebP is one of the easiest Core Web Vitals wins. This converter uses the Canvas API to re-encode at your chosen quality level (High/92% by default). The conversion happens entirely in your browser. Your file is not uploaded anywhere.

The savings are especially dramatic with screenshots and graphics that have large flat-color areas. A 3 MB PNG screenshot of a UI might drop to 800 KB as WebP. For product photos and marketing images, you are looking at 40-60% savings typically. These numbers add up fast across a site with dozens of images. If Lighthouse is flagging your images, converting from PNG to WebP is one of the quickest fixes.

WebP supports alpha transparency, so transparent PNGs convert without losing their transparent backgrounds. The lossy encoding at the default High quality (92%) means it is not pixel-perfect like the original PNG, but the difference is invisible in practice. You can adjust the quality level in the Conversion Settings panel. If you need lossless WebP, that is not currently supported by the Canvas API in browsers. For cases where you need to go back to PNG for compatibility, WebP to PNG handles that. If file size is the priority and you do not need transparency, PNG to JPG is another option.

PNG vs WEBP

Portable Network Graphics (PNG)

PNG (Portable Network Graphics) is a lossless image format that supports transparency, making it ideal for graphics, icons, and screenshots.

Common uses: screenshots, graphics with transparency, and lossless images

W3C PNG specification

WebP Image (WEBP)

WebP is a modern image format developed by Google that provides both lossy and lossless compression, typically producing smaller files than JPG or PNG.

Common uses: web images, performance optimization, and modern browsers

Google WebP documentation

How to convert PNG to WEBP

  1. 1

    Choose your PNG file

    Drag and drop a .png file onto the converter or click to browse. Screenshots, graphics, and photos with transparency all work. The file is read locally.

  2. 2

    Convert to WebP

    The converter draws your PNG onto a Canvas and exports it as WebP at your chosen quality level (High/92% by default). You can adjust this in the Conversion Settings panel. Transparency is preserved. The process takes under a second for most files.

  3. 3

    Check the file size savings

    Compare the WebP output size against the original PNG. Expect 50-70% reduction for screenshots and graphics. Photos typically see 40-60% savings.

  4. 4

    Download the WebP

    Save the .webp file. Use it on your website, in your build pipeline, or anywhere you need smaller images with modern compression.

Frequently Asked Questions

Last updated: 2026-03-23