Convert Image to WebP
Turn JPG and PNG files into WebP for faster pages — no upload, no account, no limit.
Crop & aspect ratio
Resize & compress
Output size
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Original
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Optimized
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Saved
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Recommendation
Load an image to see a tailored weight target.
100% private — your image is processed locally and never uploaded to any server.
Why WebP has become the web standard for images
WebP is a modern image format developed by Google and now supported by every major browser — Chrome, Firefox, Safari, Edge, and Opera all handle it natively. Compared to JPEG at equivalent visual quality, WebP files are typically 25–35% smaller. Compared to PNG for photos, the savings are even larger. Switching your web images to WebP is one of the highest-return optimisations you can make for page speed without touching your code.
The Image Optimizer converts JPG, PNG, and existing WebP files to WebP directly in your browser — your images never leave your device. The Canvas API encodes the result at whatever quality you choose, and the live size comparison shows you exactly how much smaller the WebP output is before you commit to downloading it.
A few cases where you might still choose a different format: if you are sending images to a system or person whose software does not support WebP (such as some older image editors), JPEG is more universally compatible. PNG remains the right choice when you need lossless compression with zero quality loss — though note that WebP also supports lossless mode at even smaller sizes. PNG files with transparency convert cleanly to WebP, which preserves the alpha channel; converting a transparent PNG to JPEG will fill transparent areas with white.
Step by step
- Click Choose file or drop your JPG, PNG, or other image onto the tool.
- The output format is already set to WebP — no change needed.
- Adjust the quality slider. Quality 80 is a good starting point; lower values produce smaller files with slightly more visible compression.
- Check the compressed size shown below the preview against the original size to see the saving.
- Click Download to save the WebP file. The filename will end in
.webp.
Tips
- Quality 80 in WebP looks virtually identical to quality 90+ in JPEG for most photographs. Start at 80 and only increase if you see artefacts in the preview.
- If you have a PNG with a transparent background, WebP preserves transparency perfectly. The output is both smaller than the PNG and maintains the alpha channel.
- Batch multiple conversions in one session by opening additional browser tabs — there are no upload limits or sign-ins required.
- When deploying to a web server, keep the
.webpextension so that browsers and CDNs can serve the correct MIME type and cache efficiently. - For logos and icons with large flat-colour areas, compare WebP against PNG lossless — sometimes PNG is competitive in file size for very simple graphics.