📐 Resize Image Online
Free online image resizer: change your photo dimensions with presets for Instagram, Facebook, YouTube and 4K. Aspect ratio lock, batch up to 10 images, ZIP download.
Drag & drop images here (max 10)
Why resize images?
Resizing an image is one of the most common image operations. Whether you need to fit a photo to social media dimensions, reduce an image's weight for the web, or prepare a visual for print, resizing is essential.
Social media image dimensions
| Platform | Type | Size (px) | Ratio |
|---|---|---|---|
| Square post | 1080 × 1080 | 1:1 | |
| Story / Reel | 1080 × 1920 | 9:16 | |
| Cover photo | 820 × 312 | ~2.6:1 | |
| Twitter/X | Post image | 1200 × 675 | 16:9 |
| Post image | 1200 × 627 | ~1.9:1 | |
| YouTube | Thumbnail | 1280 × 720 | 16:9 |
Why aspect ratio matters
When resizing, it's crucial to maintain the aspect ratio. Changing width without proportionally adjusting height will distort the image — faces will appear stretched or squished. Our tool locks proportions by default.
Tips for good resizing
- Downscaling always works well. Upscaling beyond original dimensions creates blur (pixelation).
- For profile pictures, use a square format (1:1).
- For web, 1200-1920px width is sufficient for most screens.
- Consider compressing the image after resizing for optimal file weight.
Privacy
Our tool works entirely in your browser. Your images never leave your device. Process up to 10 images simultaneously and download them individually or as a ZIP archive.
Frequently Asked Questions
How do I resize an image online?
Drag your image into the tool, enter the desired dimensions (or click a preset like Instagram) and click Resize. The result is downloadable instantly.
What image size for Instagram?
Square post: 1080×1080 px. Story and Reel: 1080×1920 px. Our tool offers these presets in one click.
How do I resize without distorting?
Keep the 'Keep proportions' checkbox checked. When you change width, height adjusts automatically and vice versa.
Can I enlarge an image?
Technically yes, but enlarging beyond original dimensions creates blur. It's best not to exceed the original size.
Are my images uploaded to a server?
No, everything happens in your browser. No images are uploaded.
How do I resize multiple images at once?
Drag up to 10 images, set the dimensions and click Resize. All images will be processed with the same dimensions.