WebP Optimizer
Compress
The canvas previews the compressed result live as you adjust the settings. Click Compress for the exact size and a before/after split — drag the divider to judge the quality, then download. The original file is never modified.
Your images are processed locally in your browser and never uploaded to any server.
Converting to WebP is only half the job. If the file is still 4000px wide for an 800px slot, you are shipping pixels nobody ever sees. This optimizer caps width at the size your layout needs and re-encodes at web-appropriate quality, cutting file size from both directions at once, locally in your browser.
How to use the webp optimizer
- Add your WebP files (drag-and-drop or the file picker).
- Choose the max width; anything wider is scaled down proportionally.
- Adjust quality. 75–80 is the sweet spot for WebP on the web.
- Download each optimized file or the whole batch as a ZIP.
Frequently asked questions
Why optimize a WebP instead of just compressing it?
Compression only touches quality. Optimization also right-sizes: images wider than your chosen cap are scaled down first. Pixel count is the biggest file-size driver, so a 1920px cap alone often removes 50–70% of the bytes before quality settings even apply.
Will optimization remove transparency?
Never on the WebP path. The alpha channel survives both the resize and the re-encode exactly. Semi-transparent shadows and rounded corners come through intact.
What quality should WebP images use for the web?
75–80 covers most content images. WebP degrades more gracefully than JPG, so even 60–65 remains usable where every kilobyte counts. Test on your own images; the before/after preview shows exactly what you are trading.