Resize images for free
Drop your photo, then pick a width or height in pixels, a percentage, or a social media size (Instagram 1080 × 1080, YouTube 1280 × 720 and more). Proportions stay locked by default. Everything runs in your browser, and you can resize several images at once.
- ✅ Free
- 🔒 No sign-up
- 📱 Works on mobile
- ⚡ Instant results
🔒 Everything runs in your browser. Your data and files never leave your device.
Three ways to resize
- By pixels: set the width, the height, or both. With "keep proportions" on, the other side is calculated for you; if you fill in both, the image fits inside that box without distortion.
- By percentage: 50% halves each side, which cuts the pixel count to a quarter.
- Social media: the exact size a platform expects. You choose how the image fits it: cropped from the center, whole with colored bars, or stretched.
\[ \text{new height} = \text{new width} \times \left( \dfrac{\text{original height}}{\text{original width}} \right) \]
When shrinking by more than half, the tool works in several passes, which keeps more sharpness than one abrupt reduction.
Social media image sizes
| Use | Pixels | Ratio |
|---|---|---|
| Instagram square | 1080 × 1080 | 1:1 |
| Instagram portrait | 1080 × 1350 | 4:5 |
| Story, Reel, TikTok | 1080 × 1920 | 9:16 |
| Facebook post | 1200 × 630 | 1.91:1 |
| X (Twitter) post | 1600 × 900 | 16:9 |
| YouTube thumbnail | 1280 × 720 | 16:9 |
| LinkedIn banner | 1584 × 396 | 4:1 |
| Pinterest pin | 1000 × 1500 | 2:3 |
Platforms tweak their recommendations from time to time, so check the size inside the app before an important campaign.
Pixels and printing
For a sharp print, plan on 300 pixels per inch (ppi). Photos meant for screens do not need that much.
| Print size | Pixels at 300 ppi |
|---|---|
| 4 × 6 in | 1,200 × 1,800 |
| 5 × 7 in | 1,500 × 2,100 |
| 8 × 10 in | 2,400 × 3,000 |
| Letter (8.5 × 11 in) | 2,550 × 3,300 |
Enlarging a small image does not add detail; it just gets blurry. Always start from the largest original you have.
3 real-life examples
Cut a 4,032 × 3,024 px photo in half
Choose "By percentage" and 50%. The result is 2,016 × 1,512 px, a quarter of the pixels. That is already a generous size for any screen.
A square photo for Instagram
Take the same 4:3 photo, pick "Instagram square" and the "fill and crop" fit. The tool keeps the central 3,024 × 3,024 px square (504 px trimmed off each side), then scales it down to 1,080 × 1,080 px.
A 1,920 × 1,080 screenshot for a website
Enter 1,280 for the width with proportions locked. The height works out to \( 720 \, \text{px} \ \left( \dfrac{1{,}280 \times 1{,}080}{1{,}920} \right) \), and the image is not distorted.