Resize images to any size — online and free
This image resizer works like Photoshop’s Image Size and Canvas Size dialogs, but in your browser. Type the exact width and height in pixels, scale by percent, or set the print size in inches or centimetres with the DPI you need. High-quality Lanczos resampling keeps photos sharp when you make them smaller.
How to resize an image
- Drop one image or a whole folder of images.
- Pick a preset (Instagram post, YouTube thumbnail, Amazon main image, passport photo…) or type your own size.
- Choose Fit (keep everything, add padding) or Fill (crop to fill the size).
- Download one file or all images as a ZIP.
Popular image sizes
| Use | Size (px) |
|---|---|
| Instagram square post | 1080 × 1080 |
| Instagram portrait | 1080 × 1350 |
| Instagram / TikTok story | 1080 × 1920 |
| YouTube thumbnail | 1280 × 720 |
| Facebook cover | 820 × 312 (displays on desktop) |
| Amazon product image | 2000 × 2000 recommended (zoom works from 1000 px) |
| Kindle ebook cover | 1600 × 2560 |
Pixels, DPI and print size
Screens only care about pixels. Printers care about DPI (dots per inch): for a sharp print use 300 DPI, so a 4 × 6 in photo needs 1200 × 1800 px. Enter the print size and DPI and the resizer calculates the pixels for you.
Resize to a file size
Many forms ask for images “under 200 KB” or “under 1 MB”. Set a target file size and the tool adjusts quality and dimensions to fit. For the smallest files without visible loss, also try our image compressor.
Resize by size or by percent
- Percent: 25%, 50%, 75% to shrink, 150–400% to enlarge.
- Exact pixels: type width and height; the 🔗 lock keeps the proportions so the image isn’t stretched.
Four fit modes
| Mode | What happens | Use it when |
|---|---|---|
| Stretch | Image is forced to the exact size | Proportions don’t matter |
| Fit | Whole image fits inside; empty space is filled | Nothing may be cut off |
| Fill | Fills the size and crops the overflow | Profile pictures, thumbnails |
| Canvas | Image stays the same; the canvas grows around it | Adding a border or white space |
Common sizes
- Instagram post: 1080 × 1080 (square) or 1080 × 1350 (portrait)
- Facebook and LinkedIn link image: 1200 × 630
- YouTube thumbnail: 1280 × 720
- Amazon main image: at least 1000 px on the longest side for zoom
Bigger is not always better
Enlarging cannot add real detail — a small photo made 400% bigger will look soft. Resize from the largest original you have. To make a file smaller in KB rather than pixels, use the image compressor. Hold “Before” to compare with the original.