Convert PNG to WebP
Cut image weight on your site by converting PNGs to WebP, transparency included, on your own device.
Drop files here
or click to choose from your deviceAccepted: PNG
Up to 3 files per runUp to 20 MB per file10 runs per dayRemove limits with Pro✓ Works offline
Your files stay on your device
This tool runs entirely in your browser using WebAssembly. Nothing is uploaded, nothing is stored, and you can even turn off your internet connection before you start.
How it works
- Drop .png files onto the box, or choose them from your device. Batch-convert a whole set of site assets in one run.
- Set the WebP quality. 0.8 to 0.9 is the sweet spot for UI graphics and screenshots; set it to 1 for lossless WebP where every pixel must be preserved.
- Press Convert to WebP. Encoding happens in your browser using its built-in WebP encoder.
- Download the files one by one or as a ZIP and replace the PNGs in your project.
Frequently asked questions
- Why convert PNG to WebP?
- WebP is typically 25-35% smaller than PNG for the same picture, and often far smaller for screenshots and photos stored as PNG. Smaller images mean faster page loads and better Core Web Vitals scores. All modern browsers, including Safari 14 and later, display WebP.
- Are my images uploaded?
- No. The PNG is decoded and the WebP is encoded entirely inside your browser. Nothing is sent to a server, and the page works offline.
- Is transparency preserved?
- Yes. WebP supports an alpha channel, so transparent backgrounds from PNG stay transparent.
- Is the conversion lossless?
- At quality 1 the browser produces lossless WebP, an exact copy of the PNG pixels. Below 1 the encoder is lossy, which gives much smaller files and is fine for most web use.
- Which browsers can create WebP?
- Chrome, Edge, Firefox and Safari 16 or later can all encode WebP. If your browser cannot, the download will fall back to PNG.
- What are the free limits?
- The free plan allows 3 files per run, 20 MB per file and 10 runs per day. Pro removes these limits.
Related tools
• JPG to WebP Serve lighter photos on your website or blog by converting JPG to WebP on your own device. • WebP to PNG Keep transparency and every pixel: turn WebP graphics into PNG files on your own device. • PNG to JPG Bring a 10 MB PNG down to a few hundred kilobytes without sending it anywhere. • SVG to PNG Turn a vector into a sharp bitmap for platforms that do not accept SVG, without sending it anywhere.