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CalcChef

Image Cropper

Crop an image to 1:1, 4:5, 16:9, 9:16, golden or a custom ratio, type exact pixels or rotate it, and save PNG, JPEG or WebP at full size, with no scaling. How it works

Use the Image Cropper

About the Image Cropper

The Image Cropper saves the area you select as a PNG, JPEG or WebP at its exact size in the picture's own pixels, the same on every screen: a 1,000 x 750 selection from a 4,000 x 3,000 photo is a 1,000 x 750 file. Pick Free, 1:1, 4:3, 16:9, 3:2, 3:4, 2:3, 4:5, 9:16, 21:9, Golden 1.618:1 or a custom width:height ratio, drag the frame or type its position and size in pixels, turn the picture if it is crooked, and download a crop of up to 10,000 pixels on a side and 16 million pixels in all.

Largest crop that can be saved, by shape (width rounded from the height)

ShapeLargest crop (pixels)Pixels in all
1:14,000 x 4,00016,000,000
4:34,617 x 3,46315,988,671
3:24,898 x 3,26515,991,970
16:95,333 x 3,00015,999,000

The limits are 16,000,000 pixels in all and 10,000 pixels on a side, counted in the picture's own pixels. Each row takes the tallest height whose width, height × ratio rounded, still fits. A frame keeps its shape only to within a pixel, so a slightly different crop can also fit: 4,618 x 3,464 (15,996,752 pixels) is under the limit too.

Frequently asked questions

How do I crop a picture to 16:9 or a square?
Press 16:9 or 1:1 (or 4:5, 9:16, 21:9 and the others), or press Custom and type a ratio such as 21 and 9. A centred frame of that shape appears; drag it or its corners and it keeps the shape. Free lets you draw any rectangle, and typing X, Y, Width or Height switches to Free. Custom ratios go from 1:100 to 100:1, with each side at most 1000.
Can I rotate or straighten a photo before cropping?
Yes. Left and Right turn it 90 degrees, and the fine slider turns it from -45 to 45 degrees; Straighten again undoes both. The crop is taken from the turned copy, so the corners a fine turn leaves empty are transparent, or white in a JPEG. Rotating clears the frame. The turned copy may have up to 16 million pixels: a 4000 x 3000 photo turns 90 degrees, but only up to 9 degrees on the fine slider.
What size is the cropped image?
Exactly the selected area in the picture's own pixels, saved in the format you pick and named after the original: My Photo (1).jpg becomes My_Photo_1-cropped.png, My_Photo_1-cropped.jpg or My_Photo_1-cropped.webp. The page shows the size before you download, for example Crop: 1,000 x 750 pixels, from a 4,000 x 3,000 picture. The pixel density of your screen does not change it.
Can I save the crop as a JPEG or WebP instead of a PNG?
Yes. Pick JPEG or WebP under Save as and set the quality from 1 to 100; it starts at 85, and a lower number gives a smaller file. JPEG cannot hold transparency, so transparent areas of a PNG become white. WebP is saved only if your browser can write it; otherwise the page shows a message and you can choose another format. PNG stays lossless, with no quality setting.
Why can't I download a large crop?
A saved crop is limited to 10,000 pixels on a side and 16 million pixels in all, because phone browsers cannot draw larger pictures. A 4,096 x 4,096 frame is refused with This crop is 4,096 x 4,096 pixels (17 million); 4,000 x 4,000 is the largest square. Select a smaller area: the tool never shrinks the picture without saying so.
Can I crop a HEIC, SVG or animated GIF?
SVG files are refused, because a vector drawing has no fixed pixel size. A HEIC photo opens only in a browser that can show it; otherwise the page says the file cannot be shown. An animated GIF opens, but the crop is saved as a single still image.

What people crop with it

Use it to cut a screenshot down to what matters, square a photo for an avatar, or cut a frame to 16:9 for a thumbnail, 4:5 or 9:16 for a phone post, or 3:2 for a 6 x 4 print. Pick a shape (eleven presets or Custom), then drag the frame, which has a rule-of-thirds guide, or type its X, Y, Width and Height. A crooked photo can be turned 90 degrees at a time, or -45 to 45 degrees on the fine slider. The picture is opened in your browser and is not uploaded.

How the frame becomes pixels

The frame is drawn on the picture as shown on screen, so its edges are converted back to the picture's own pixels:

source x = round(frame x × natural width ÷ shown width)

and the same for y and the other edges. Example: a 4000 x 3000 photo shown at 800 x 600 has 5 source pixels per screen pixel. A frame of 200 x 150 at (100, 50) on screen becomes the area from (500, 250), 1000 x 750 pixels, and the page reads Crop: 1,000 x 750 pixels, from a 4,000 x 3,000 picture. Typed values are in these pixels and switch the shape to Free.

Rotating draws a turned copy and crops from it. It clears the frame, and the corners a fine turn leaves empty are transparent. The copy may have up to 16 million pixels, so a 4000 x 3000 photo turns 90 degrees but only up to 9 degrees on the fine slider.

Limits: files up to 25 MB and 100 million pixels. A crop is saved up to 10,000 pixels on a side and 16 million in all, so the largest square is 4,000 x 4,000; a larger frame keeps Download off. PNG is lossless. JPEG and WebP take a quality from 1 to 100, starting at 85, and JPEG fills transparent areas with white. The file is named like photo-cropped.jpg.

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