Resize an image online — free, no upload
Resize any image to exact pixel dimensions or by percentage, right in your browser. JustGIF's resizer keeps your photo sharp and lets you lock the aspect ratio so nothing looks stretched, with no software to install and no files leaving your device.
How to resize an image
- Drag your image into the upload box, or click to browse — you can also paste an image URL.
- Enter a new width and height, or scale by percentage. Keep the aspect-ratio lock on to avoid stretching.
- 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
- Resize by exact pixels or by percentage
- Lock the aspect ratio to keep proportions
- 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
Will resizing reduce image quality?
Scaling an image down stays crisp. Enlarging beyond the original size can look soft because there are no extra pixels to invent — for best results, scale down rather than up.
Which formats can I resize?
JPG, PNG, WebP and GIF. The output keeps the same format unless you convert it afterward.
Is Resize free to use?
Yes. Resize 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.