Image Cropper
Crop images to a custom area or aspect ratio.
Lower quality gives a smaller file.
Your file is ready
Was this tool helpful?
Thanks for the feedback!
The Image Cropper cuts a rectangle of the exact width and height you type, in pixels, from the centre of your picture and saves it as a PNG. It suits the most common cropping job: trimming a photo to a new shape, such as a square profile picture or a 16:9 banner, while keeping the middle of the scene.
How this cropper works
After you upload an image, two boxes appear, Width (px) and Height (px), pre-filled with the photo's original size. Lower one or both values and click Process image. The tool keeps a rectangle of that size centred on the image and removes an equal amount from opposite edges. Values larger than the original are capped at the original size, so you cannot accidentally add empty borders.
There is no draggable selection box. If your subject sits near one edge, a centre crop may cut it off; for that you need an editor that lets you drag the crop area, such as your phone's gallery app.
Working out dimensions for a given aspect ratio
To crop to a ratio without losing more than necessary, keep the longer allowed side at full size:
- If the photo is wider than the target shape, keep the height and set width = height × (ratio width ÷ ratio height).
- If it is taller than the target shape, keep the width and set height = width × (ratio height ÷ ratio width).
For a 4000 × 3000 photo (4:3, typical of phone cameras):
| Target shape | Enter width × height | Trimmed |
|---|---|---|
| 1:1 square | 3000 × 3000 | 500 px off each side |
| 16:9 banner or thumbnail | 4000 × 2250 | 375 px off top and bottom |
| 4:5 portrait post | 2400 × 3000 | 800 px off each side |
| 9:16 story or reel | 1688 × 3000 | about 1156 px off each side |
The aspect ratio calculator does this arithmetic for any size.
Cropping is not resizing
This is the most common mix-up. Typing 1080 × 1080 on a 4000 × 3000 photo does not shrink the whole picture to 1080 pixels; it cuts out a small 1080-pixel square from the middle, which looks heavily zoomed in. For a 1080 × 1080 version of the full centre square, crop to 3000 × 3000 here first, then scale the result down with the image resizer.
The downloaded file
- The crop is saved as a PNG, so no quality is lost in the cropped area, and the Quality slider does not apply.
- Because camera photos are large as PNG, convert the result with PNG to JPG if you need a small file for uploading or messaging.
- Transparent areas in a PNG source stay transparent.
- The Result preview shows the final dimensions and size, so you can confirm the crop before downloading.
Tips for a better crop
- Centre crops work best on photos where the subject is in the middle, such as headshots, product shots on plain backgrounds and landscapes.
- Straighten a sideways photo before cropping, since the width and height values swap after rotation.
- Crop before you compress: every pixel removed is data the compressor no longer has to store. For an exam-form photo, trim the extra background here, then use Resize Image in KB to set the required pixel size and file size.
The whole crop runs in your browser tab; the photo is not sent anywhere.