How to resize an image
- Add one or more images by dropping them on the box or clicking to browse.
- Choose how to resize: by exact width and height in pixels, or by a percentage of the original size.
- To keep proportions, enter only the width (or only the height) and leave the other box empty — it is calculated automatically.
- If you need an exact size, such as 600 × 600 for a profile photo, enter both and choose whether to fit inside, crop to fill, or stretch.
- Press Process images and download the results.
Fit, crop or stretch — which should I choose?
| Option | What happens | Best for |
|---|---|---|
| Keep aspect ratio (fit inside) | The image is scaled so it fits within the width and height you set. Nothing is cut off; one side may be smaller than requested. | Most uses — websites, documents, email |
| Crop to fill exactly | The image is scaled to cover the full area and the overflow is trimmed from the centre. The result is exactly the size you asked for. | Profile pictures, thumbnails, product grids |
| Stretch to exact size | The image is forced to the exact width and height, which can squash or stretch it. | Rarely — only when distortion does not matter |
Common image sizes
| Where | Recommended size (px) |
|---|---|
| Facebook / LinkedIn shared post | 1200 × 630 |
| Instagram square post | 1080 × 1080 |
| Instagram portrait post | 1080 × 1350 |
| Instagram / Facebook story | 1080 × 1920 |
| YouTube thumbnail | 1280 × 720 |
| X (Twitter) post image | 1600 × 900 |
| Full-HD website banner | 1920 × 1080 |
Social networks update their recommendations from time to time, so check the platform’s help centre for anything critical.
Resizing vs. compressing
Resizing changes the number of pixels (the dimensions). Compressing changes how efficiently those pixels are stored. Both reduce file size, and they work best together: resize a 4000-pixel phone photo to 1600 pixels and it will typically shrink by around 80% before any compression. If you need a specific file size in KB rather than specific dimensions, use the Image Compressor or Reduce to 100 KB tools.
Does resizing reduce quality?
Making an image smaller keeps it sharp — the browser uses high-quality smoothing when scaling down. Making an image larger than the original cannot add detail that was never captured, so enlarged images look softer. As a rule, avoid enlarging photos by more than about 150%.
Frequently asked questions
How do I resize an image without stretching it?
Enter only the width or only the height and leave the other box empty, or choose “Keep aspect ratio”. The other dimension is calculated to match the original proportions.
Can I resize several images at once?
Yes. Add as many images as you like; they are all resized with the same settings, and you can download them together as a ZIP file.
Will resizing change the file format?
Not by default — each image keeps its format. You can choose JPG, PNG or WebP output if you want to convert at the same time.
Are my images uploaded?
No. Resizing happens in your browser and your images never leave your device.
What is the difference between pixels and DPI?
Pixels are the actual dimensions of an image. DPI only matters when printing: an image 3000 pixels wide prints 10 inches wide at 300 DPI. For screens and uploads, only pixels matter.