100% on-device · nothing uploaded
Crop an image
Pick an image and drag a box over the part you want to keep — move it, pull a corner to resize, or type exact pixel values for a precise crop. Lock a ratio like 1:1 for a profile picture or 16:9 for a thumbnail. It all runs in this tab, so the image is never uploaded.
How to use it
- Choose an image — PNG, JPG, WebP and most others work.
- Drag the selection box, or a corner handle, over the region to keep. For a set shape, pick an aspect ratio first.
- Check the pixel readout (or type exact values), then Crop — the cut-out downloads.
The ratios platforms enforce, and what they cut
Instagram accepts 1:1 and 4:5, and 4:5 is the tallest it allows, which is why portrait posts occupy the most vertical space in a feed. YouTube thumbnails and most video stills are 16:9. Open Graph previews, the card that appears when a link is shared, sit near 1.91:1 and are centre-cropped from whatever you supply. Cropping to the target ratio yourself is the only way to control which part survives.
What gets cut is predictable once you know the crop is centred. A 16:9 image dropped into a square slot loses about a fifth of its width from each side, so a subject placed near an edge disappears. Avatar frames go further and mask a circle inside the square, removing the corners outright: anything sitting in them, a signature or a logo lockup, will never be seen. Leave margin around whatever matters.
The kept pixels are untouched; the saved file is not
Cropping does no resampling. Every pixel inside the selection is carried across exactly as it was, unlike resizing or free-angle rotation, where each output pixel is a blend of several inputs. In that narrow sense the operation is lossless, and a PNG in gives a PNG out with identical values inside the box.
Export is a separate step. A JPEG is re-encoded from that pixel data, so a JPEG in and a JPEG out is a new compression generation even when nothing looks different: the eight-by-eight blocks are requantised and the small errors accumulate. Cropping the same file four times in succession is four generations. Crop once from the original where you can, and export PNG if further edits are coming.
Questions
Is my image uploaded to crop it?
No. The crop is taken by your browser on your own device, so the image never leaves this tab. Most free "crop image" sites upload your file to a server first.
How do I crop to an exact size?
Type the exact Width and Height (and X/Y position) in the boxes and the selection updates to match — useful when you need, say, a precise 1080 × 1080 square. You can also drag the box and read the live pixel dimensions.
Can I crop to a square or 16:9?
Yes — pick an aspect ratio (1:1, 4:3, 3:2 or 16:9) and the selection box keeps that shape as you drag a corner, so the result comes out in exactly the proportions you need.
Does cropping lose quality?
No. Cropping keeps the original pixels inside your selection untouched — a PNG stays lossless. A JPG or WebP is re-saved at high quality, an essentially invisible change.
What format do I get back?
The same format you put in — a PNG stays a PNG, a JPG stays a JPG. Formats the browser can't write back (like GIF or BMP) come out as a lossless PNG.
Updated 2026-07-20. Runs fully in your browser — nothing is uploaded.