PNG to WebP Converter
Convert PNG images to WebP format in your browser. Smaller files, same quality, no upload to any server.
Try PNG to WebP Converter free →
The problem
PNG files are large. A screenshot or UI mockup that is 2MB as a PNG could be 400KB as WebP with no visible quality loss. If you are building a website, every extra megabyte slows your page load, hurts your Core Web Vitals, and costs bandwidth. But converting formats usually means installing desktop software or uploading images to a third-party server.
How it works
- Drop your PNG onto the converter or click to select a file.
- Adjust quality if needed — the default of 85% gives an excellent balance of size and visual fidelity.
- Download the WebP. The converted file is ready instantly.
Your image never leaves your browser. The conversion uses the Canvas API locally.
Why I built it
I was optimizing page load times and needed to batch-convert PNGs to WebP. The online tools all uploaded files to their servers. I wanted something local that I could trust with client screenshots and internal assets.
PNG vs WebP comparison
| Feature | PNG | WebP |
|---|---|---|
| Compression | Lossless only | Lossless and lossy |
| Typical file size | Larger | 25-35% smaller (lossless), 60-80% smaller (lossy) |
| Transparency | Yes | Yes |
| Animation | No (use APNG) | Yes |
| Browser support | Universal | 97%+ (all modern browsers) |
| Best for | Lossless archival, print | Web images, apps |
Use PNG when you need universal compatibility or lossless archival quality. Use WebP when file size matters — which is most of the time on the web. See the full comparison at PNG vs WebP.
Built with vanilla HTML/JS. No frameworks, no backend, loads instantly.