Crop Image by Dragging a Box Over the Part to Keep
Trim a photo, signature scan or certificate margin by hand, then download the cut as JPG or PNG
Drop an image here
JPG, PNG or WebP
Cropping happens in your browser, so the image is never uploaded anywhere.
About this tool
A signature photographed on a sheet of paper is mostly paper. A selfie taken for a form is mostly wall. A certificate scanned on a flatbed has a dark border where the lid did not close. In each case the useful part is a small rectangle inside a much larger picture, and the portal only wants that rectangle.
This cropper is the plainest way to cut it out. Drag a box over the part you want to keep, press Crop, and download. There are no aspect-ratio locks, numeric fields or presets. It is meant for the quick trim that comes before resizing or compressing, when the exact numbers do not matter yet.
The crop is done in your browser. The file is never uploaded.
How to crop an image
- Click or drop the image. JPG, PNG and WebP open.
- Press on the picture where one corner of the area should be and drag to the opposite corner. A blue box shows the selection as you go.
- Release. To change it, drag again anywhere on the picture; a new drag replaces the old box.
- Click Crop. The button stays greyed out until the box is a few pixels wide and tall.
- Download the file, which is named with -cropped added before the extension.
- Click Choose a different image to start again with another file.
What the crop produces
The output contains the original pixels inside the box, at their original resolution. The on-screen preview is scaled to fit the page (at most 480 px tall), so the box you draw is mapped back onto the full-size image. If a 4000 px wide photo is shown at 800 px and you select half its width, the file you download is about 2000 px wide. Nothing is resampled, so a crop never softens the picture.
The only change in quality comes from the single JPG re-encode at 92%, which is invisible for a photo and leaves a signature's strokes clean. A PNG goes through no loss at all.
| Input | Output | Encoding |
|---|---|---|
| JPG | JPG | 92% quality, re-encoded once |
| PNG | PNG | Lossless, transparency kept |
| WebP or any other format the browser opens | JPG | 92% quality |
Typical trims before a form upload
- Signature: cut around the strokes leaving a thin white margin on every side, then take the result to the resizer for 140 × 60 px or 4 × 2 cm. A crop with no margin makes the strokes touch the box edge after resizing, which some verifiers treat as an incomplete signature.
- Photo: keep the head and the top of the shoulders with a little space above the hair, in roughly the 7 to 9 proportion of a 3.5 × 4.5 cm passport photo. A box close to that shape means the resizer's Fill and crop step trims almost nothing.
- Scanned certificate: drag just inside the sheet's edge to drop the scanner border and any neighbouring page. Fewer pixels means a smaller file when the page is later converted or merged into a PDF.
- Thumb impression: select a square around the print with white space around the ridges, then resize to 240 × 240 px.
- Marksheet photographed on a phone: crop to the sheet's outline first, then rotate if the text runs sideways, then compress.
Limits of a hand-drawn crop
The selection is drawn by eye, so it is approximate. You cannot type 200 × 230 here; for an exact pixel size, crop roughly and then use the resizer, which accepts typed values and presets. The box cannot be nudged with arrow keys or resized by its edges; redraw it instead. It also cannot extend past the picture, because the drag is clamped to the image area.
On a phone, drag with one finger. The page does not scroll while your finger is on the picture, which is deliberate, so lift your finger off the image to scroll.
A WebP source is saved as JPG, since the cropper only writes JPG or PNG. A transparent PNG stays transparent.
A tap without a drag, or a box under 4 screen pixels in either direction, is ignored and the Crop button stays disabled.
Frequently asked questions
›How do I crop a passport size photo from a normal photo?
Drag a box around the head and shoulders that is a little taller than it is wide, about 7 units across to 9 down, leaving some space above the hair. Click Crop and download. Then open the file in the resizer and choose the Passport 3.5 × 4.5 cm preset; because the shape already matches, Fill and crop trims almost nothing and the face stays where you placed it.
›Can I crop an image to an exact pixel size like 200 × 230?
Not with this tool alone, since the box is drawn by hand. Crop to roughly the right area here, then use the resizer with the 200 × 230 px preset, which produces that exact size and crops or pads the small difference. Doing the rough cut first gives you control over what stays in the frame.
›How do I crop my signature from a scanned page?
Scan or photograph the signature on plain white paper, open the file, and drag a box around the strokes with a small white margin on all sides. Crop, download, and resize to the box the form asks for, usually 140 × 60 px. If the paper looks grey in the scan, the resizer's white background will not hide it; rescan with more light or press the paper flat.
›Does cropping reduce image quality?
The pixels inside the box are copied as they are, without scaling, so sharpness is unchanged. A JPG is written once at 92% quality, which is a very light compression. A PNG is written losslessly. Repeated crop-and-save cycles on a JPG would add up slowly, so crop once from the original rather than from an earlier crop.
›Why is the Crop button disabled?
No box has been drawn yet, or the box is smaller than 4 screen pixels in width or height, which happens after a tap or a very short drag. Press on the image, drag to the opposite corner so a blue rectangle appears, and release. The button becomes active as soon as the box is large enough.
›Can I crop a page out of a PDF here?
No. The tool opens image files only. Export the page as an image first, for example by taking a screenshot of it at full zoom or by using a PDF tool that saves pages as JPG, then crop that image. If you only need to remove pages from a PDF rather than trim within a page, a PDF split tool is the better fit.