Compress an image online — smaller files, same look
Shrink JPG, PNG and WebP files so they upload and load faster, without an obvious drop in quality. Drag the quality slider and watch the estimated file size update live before you download.
How to compress an image
- Drag your image into the upload box, or click to browse — you can also paste an image URL.
- Drag the quality slider to balance size against quality — the estimated file size updates as you move it.
- 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
- Adjustable quality slider
- See the new file size before you download
- 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
How much smaller will my image get?
Most photos shrink 40–80% with little visible change. Lower the slider for smaller files, raise it to keep more detail.
Does compressing change the format?
No — JPG stays JPG and PNG stays PNG. Use the Convert tool first if you want WebP, which compresses even more.
Is Compress free to use?
Yes. Compress 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.