Anyone who runs a website has had this experience: too many images on a page and it loads slowly, and users lose patience and close the tab. You try to compress the images, but PNG barely shrinks and JPG gets blurry when compressed hard. Google actually introduced the WebP format back in 2010, specifically to solve the "small and sharp" problem.
WebP image compression is now a mainstream choice for website optimization. This post covers what makes WebP so good, when to use it, and how to convert ordinary images to WebP.
Why is WebP smaller than JPG and PNG?
WebP supports both lossy and lossless compression and uses more efficient predictive and entropy coding under the hood, so it's smaller at equal quality.
| Feature | WebP | JPEG | PNG |
|---|---|---|---|
| Size at equal quality | Smallest | Medium | Largest (lossless) |
| Transparency | ✅ | ❌ | ✅ |
| Animation | ✅ | ❌ | ⚠️ (extra effort) |
| Browser support | All major browsers | All | All |
| Typical savings | Baseline | 25-35% larger than WebP | 50%+ larger than WebP |
For a website, switching images to WebP can often cut total page image size by about half, with a visible speed improvement.
When does WebP make sense?
WebP isn't a cure-all, but it's a great fit for these scenarios:
- Web images — product shots, article images, and carousels load noticeably faster as WebP
- Logos and icons needing transparency — PNG is lossless but heavy; WebP lossless keeps the same quality at a smaller size
- Simple animated images — smaller than GIF with better quality
- CDNs and image servers — standardizing on WebP cuts bandwidth costs
One thing to watch: if your users are on older browsers or systems without WebP support, you'll want a fallback (like serving JPG based on browser type).
Online converter vs. desktop software vs. batch scripts
| Feature | Online converter | Desktop editor | Command-line script |
|---|---|---|---|
| Ease of use | Low | Medium | High |
| Batch processing | ✅ | ✅ | ✅ |
| Parameter control | Moderate | High | High |
| Privacy | ✅ local | ✅ | ✅ |
| Needs install | No | Yes | Yes |
How to generate WebP with PixelForge
Open the PixelForge image compression tool — no software to install, and you can convert and compress PNG/JPG to WebP right in the browser.
Step 1: Upload images. Drag PNG or JPG images into the upload area. Multiple files can be processed at once.
Step 2: Choose WebP output and tune settings.
- Select WebP as the output format
- Use lossless mode when you need a transparent background; for ordinary photos use lossy mode with quality at 80-90% — the difference is nearly invisible
- Preview in real time to confirm both size and quality work for you
Step 3: Download. Download files individually or in a bundle, then use the WebP images directly on your site or share them.
The whole conversion and compression happens locally in your browser — images never go to a server, so commercial assets stay private.
Summary
WebP is clearly smaller than JPG and PNG at equal quality, making it a high-value choice for website image optimization. Just keep older-browser compatibility in mind and set up a fallback.