WebP Guide: Convert, Compress and Stay Compatible

Step 1: Convert JPG / PNG to WebP

Open the JPG to WebP tool on HeronTool:

  1. Upload (or drag in) a JPG image;
  2. Click convert — a WebP file is generated locally in your browser;
  3. Download and save it.

If your source is a PNG, use the Image Converter and pick WebP as the output. Everything runs locally in your browser — your images are never uploaded to any server.

Step 2: Compress the WebP file

Web images usually need further "slimming": open Image Compressor, upload the WebP file and drag the quality slider until size and quality are balanced (75–85 quality usually looks fine to the eye). When you need thumbnails, the Thumbnail Maker can batch-produce multi-size WebP previews in one go — handy for e-commerce and blog covers.

Step 3: What if something is not compatible?

  • Uploading, printing or legacy systems: convert WebP back to PNG (WebP to PNG) or JPG for maximum compatibility;
  • Vector use cases: if your source is SVG, convert SVG to PNG first, then to WebP, to avoid extra lossy rounds;
  • Browser fallback: in web development, use the element so older browsers fall back to JPEG/PNG automatically:
<picture>
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="Example image">
</picture>

FAQ

Q: Is WebP lossless?
Yes. WebP supports lossless mode and 8-bit alpha transparency — ideal for icons and line art that need crisp edges.

Q: Will the converted WebP look blurry?
Lossy conversion of the same image loses a little detail, which is normal; keep the quality slider above 80 and the difference is usually invisible.

Q: How do I know my browser supports WebP?
All mainstream browsers (Chrome / Firefox / Edge / Safari 16+) support it — just double-click a WebP file to verify.

In summary

A complete WebP workflow is simple: convert → compress → fall back as needed. All of it can be done in minutes with HeronTool's free online tools, fully local, with no file uploads.