JPG/PNG to WebP Image Converter

How to convert JPG or PNG to WebP

1. Click the drop zone, or drag in a JPG/JPEG or PNG file. Other formats are not accepted.
2. Use the WebP quality slider. It starts at 82%; every change re-encodes the image instantly.
3. Check the line under the preview, which shows the dimensions and the new file size in KB. Compare it with the original size in your file manager.
4. Zoom into faces, product edges, gradients and any small text in the preview.
5. Click Download WebP. The file keeps its original name with a .webp extension.

The tool draws your image onto an HTML canvas at its original size and asks the browser to encode it with canvas.toBlob(callback, 'image/webp', quality). The slider value is divided by 100, so 82% becomes 0.82. It does not resize. Use the image resizer and compressor if the image is larger than it is displayed.

JPG vs PNG vs WebP

Size figures are from Google's WebP documentation. Google Images lists WebP as a supported format (image SEO best practices). Your own savings will vary with the image.

Worked example: what WebP saves a D2C store

A Jaipur ethnic-wear brand has a category page with 24 product photos averaging 400 KB as JPG. This is a worked calculation using the low end of Google's range, not a measured benchmark:

1. Current page image weight: 24 × 400 KB = 9,600 KB (about 9.4 MB).
2. At a 25% saving each photo becomes 400 × 0.75 = 300 KB.
3. New weight: 24 × 300 KB = 7,200 KB, so 2,400 KB less per page view.
4. Across 50,000 category views a month, that is 2,400 × 50,000 = 120,000,000 KB, or roughly 114 GB less data sent to shoppers, many of them on mobile data.

To publish, reference the WebP directly with dimensions and alt text:

<img src="/images/chanderi-kurta-mint.webp" width="800" height="1000"
     alt="Mint green Chanderi cotton kurta with gota work, front view" loading="lazy">

All current major browsers display WebP, so a <picture> fallback to JPG is only needed if you must support very old browsers. Setting width and height reserves space and avoids layout shift.

Common mistakes and how to fix them

• Converting tiny, flat graphics. A 6 KB PNG logo can come out larger as lossy WebP. If the download is bigger than the original, keep the original.
• Quality 100 "to be safe". Near the top of the slider, file size climbs steeply for little visible gain. Try 75–85 for photos and only go higher if you see artefacts.
• Browser fallback. If a browser cannot encode WebP from a canvas, the canvas spec makes it fall back to PNG. Historically this affected Safari. If the file is unexpectedly large, convert in a current Chrome, Edge or Firefox.
• Renaming instead of converting. Changing .jpg to .webp in the filename does not convert anything. Google advises that the extension should match the real file type.
• Forgetting to update references. After replacing images, update the CMS, sitemaps and CSS backgrounds, and redirect old image URLs that have backlinks or image-search traffic.
• Expecting metadata to survive. Canvas conversion drops EXIF data such as camera details and GPS location. That is usually good for privacy, but keep originals if you need the metadata.

Practical use cases

• D2C or Shopify store: convert lifestyle banners and lookbook photos, then check Core Web Vitals on mobile.
• Real-estate developer: project galleries with dozens of 3D renders, which are often the heaviest assets on the page.
• Clinic or hospital: doctor photos and facility images on location pages that patients open on slow connections.
• Blog or B2B site: PNG screenshots with transparency, converted to WebP to keep the transparent background at a smaller size.

Image weight is one item in our technical SEO audit checklist. For a site built fast from the start, see our website development service, and for store-wide performance work see e-commerce and D2C marketing.

Conversion happens entirely in your browser — your image is never uploaded to our servers.