How to convert images to WebP for a faster website
Page speed matters for visitors, and images are usually the heaviest part of a page. WebP, developed by Google, generally compresses more efficiently than JPG and PNG while still supporting transparency, which is why site owners, shops and bloggers use it widely. This tool converts JPG and PNG images to WebP with a slider for choosing the quality level.
The whole process runs in your browser: the image is read, drawn at its original dimensions and exported as WebP at the quality you choose. The output keeps your original file name with a .webp extension, so there is no renaming to do.
How to use it
- Drag a JPG or PNG onto the upload box or click it to choose one.
- Move the Quality slider. It ranges from 0.3 (smallest file) to 1 (best quality) and starts at 0.85.
- Click Convert & download.
- The WebP file downloads and a confirmation appears. If your browser cannot export WebP, a message tells you so.
What you can control
- Quality level: lower values give smaller files but more visible compression artefacts.
- Transparency is kept: no background is added, so transparent PNGs stay transparent.
- Original dimensions: width and height are unchanged.
- File name: the output uses the original name with a .webp extension.
Practical uses
- Lightening product images in an online store so pages load faster on mobile.
- Converting blog images before upload instead of relying on a conversion plugin.
- Turning a transparent PNG logo into a smaller WebP for your site header.
- Preparing landing-page images for an ad campaign so they appear quickly.
- Reducing the space a large photo archive takes up on your device or cloud storage, while keeping the originals elsewhere as a backup.
Tips for choosing quality
- Photos: the default of around 0.85 usually looks very close to the original at a smaller size. Try lower values and compare if size matters most.
- Logos and text: push quality towards 0.95 or 1 to keep edges crisp.
- Resize first: a 4000-pixel-wide image shown at 800 pixels wastes bandwidth, so reduce the dimensions before converting.
- Browser support: WebP export depends on your browser; a current version of Chrome, Edge or Firefox is recommended.
- Processing is local and your images are not sent to a server.
To adjust dimensions before converting use Resize image, for a copy that works in older software use WebP to JPG, and to compress JPG files directly try Compress image.