FreeImageToolkitResize Images Online
Resize multiple images at once. Use percentage scaling or set fixed dimensions. All images are processed locally in your browser.
Features
- Batch resize — Process many images at once
- Scale by % — Proportionally resize all images
- Fixed size — Fit images within max dimensions
- High quality — Smooth resampling algorithm
How to Resize Images
- Drop one or more images into the upload area above.
- Choose a mode: Scale % to shrink or enlarge proportionally (10–200%), or Fixed size to fit images within a maximum width and height.
- Or click a preset: 1920×1080 (Full HD), 1280×720 (HD, YouTube thumbnail) or 1080×1080 (Instagram square).
- Download the resized image, or all images as a ZIP.
Common Image Sizes
Resizing for a specific network? The Social Media Image Resizer has presets for every platform and can fit a photo without cropping. See also the Instagram resizer and YouTube thumbnail resizer.
| Where | Recommended size (px) |
|---|---|
| Instagram post (square) | 1080 × 1080 |
| Instagram portrait post | 1080 × 1350 |
| Instagram / TikTok story | 1080 × 1920 |
| YouTube thumbnail | 1280 × 720 |
| Full HD wallpaper / website hero | 1920 × 1080 |
| Facebook / LinkedIn link preview | 1200 × 630 |
Good to Know
Resized images keep their original format: a JPG stays a JPG and a WebP stays a WebP, saved at high quality. Other formats such as GIF, BMP or SVG are saved as PNG. Need an even smaller file? Run the result through the image compressor.
Enlarging an image beyond its original size cannot add real detail. For better results when making images bigger, try the image upscaler.
Frequently Asked Questions
How do I resize an image without losing quality?
Reduce the size proportionally (keep the aspect ratio) and avoid enlarging above 100%. Downscaling keeps images sharp; enlarging always softens them.
Can I resize many images at once?
Yes. Add multiple files and they are all resized with the same settings, then downloaded together as a ZIP.
What size should images be for a website?
Most content images look sharp at 1200–1600 px wide. Full-width hero images rarely need more than 1920 px.
What format are resized images saved in?
The same format as the original: JPG stays JPG and WebP stays WebP. Other formats such as GIF, BMP and SVG are saved as PNG.
Are my images uploaded to a server?
No. Everything is processed locally in your browser. Your files never leave your device, so the tool is safe for private photos and confidential documents.