How to resize an image
- Add one or more images, including iPhone HEIC photos.
- Choose how to resize:
- Pixels: type a width, a height, or both. With Keep aspect ratio on, the image fits inside the box without stretching.
- Percentage: 50% halves the width and height.
- Popular sizes: ready-made sizes for Instagram, Stories, Facebook, YouTube, Pinterest and ID photos. The image fills the frame and the overflow is cropped from the centre.
- Click Resize images and download.
Popular image sizes
| Use | Size (pixels) |
|---|---|
| Instagram square post | 1080 × 1080 |
| Instagram / TikTok Story, Reels | 1080 × 1920 |
| Facebook / link preview | 1200 × 630 |
| YouTube thumbnail | 1280 × 720 |
| Pinterest pin | 1000 × 1500 |
| Website hero image | 1920 wide |
| Email attachment | 1600 wide |
Example: a form that wants a 600 × 600 photo
An online application asks for a square photo of 600 × 600 pixels. Choose Popular sizes → Passport / ID photo. Your portrait is centred and cropped to exactly 600 × 600.
Example: halving 30 camera photos
Your camera saves 6000 × 4000 photos. Choose Percentage = 50 and every photo becomes 3000 × 2000, about a quarter of the original file size.
Resize vs compress
Resizing changes the dimensions (pixels). Compressing changes how efficiently those pixels are stored. For the smallest files, resize to the size you need, then use Compress Image.
Frequently asked questions
Can I make a small image bigger?
Yes, but enlarging cannot add detail, so the result looks softer. For printing, start from the largest original you have.
Will my photo be stretched?
Not with Keep aspect ratio on, or with the preset sizes, which crop instead of stretching.
Are my images uploaded?
No. Resizing happens on your device.
Which format should I save as?
JPG for photos, PNG for graphics with transparency, WebP for the smallest web images. See our image format guide.
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Last reviewed: 2026-11-08. Tools are provided as-is. Keep a copy of important originals. See our disclaimer.