Optimize a WebP online — smallest images, free
Re-encode a WebP image at your chosen quality to squeeze out the smallest possible file. WebP is the most efficient mainstream format for fast-loading pages.
How to optimize a WebP
- Drop your WebP file into the upload box, or click to browse.
- Set the quality level and re-encode the WebP to minimize its file size.
- Click Process — everything runs instantly in your browser, with nothing uploaded.
- Preview the result and download it — or send it straight to another JustGIF tool to keep editing.
Features
- Fine-tune WebP quality
- Smallest modern image format
- Runs locally in your browser — your files never leave your device
- 100% free: no sign-up, no watermark, no file-count limit
- Works on any device — Windows, Mac, Linux, Android and iPhone
Frequently asked questions
Is WebP smaller than JPG or PNG?
Usually yes — which is why it makes pages load faster.
Is WebP Optimize free to use?
Yes. WebP Optimize is completely free with no account, no watermark, and no limit on how many files you can process.
Do my files get uploaded to a server?
No. JustGIF processes everything locally in your browser, so your files stay private on your device and nothing is uploaded.
Does it work on my phone?
Yes — JustGIF runs in any modern browser, including Chrome and Safari on phones and tablets, with no app to install.