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PixelFlow

Crop Image

Crop a picture by dragging a selection, with aspect ratio presets for squares, 16:9 and 4:3.

Drop your image here

or click to browse

Processed locally — never uploaded

Free Square 1:1 4:3 3:4 portrait 16:9 widescreen 9:16 vertical 3:2 2:3

Drag on the preview to move and resize the selection. The darkened areas are what get removed.

How to use crop image

  1. 1
    Add your image

    The preview opens with a selection you can drag and resize directly.

  2. 2
    Choose a ratio if you need one

    Locking the ratio to 1:1 or 16:9 keeps the selection correct as you drag.

  3. 3
    Crop and download

    The panel confirms the output pixel dimensions and shows the file size the cropped version will be.

About crop image

Crop image removes the parts of a photograph you do not want. Use it to remove empty space or distracting edges, to reduce file size without losing the part that matters, or to force an image into the exact aspect ratio a website or platform requires.

Cropping is more useful than it first appears. A large photo full of sky above a landscape can lose most of its file size by discarding the sky, which looks identical and downloads considerably faster. The same applies to the blurred edges and dark corners left by portrait mode photography.

Pick the ratio from the dropdown before you start if the target is a known format, because the aspect lock then guarantees the result fits. Free mode is for when you simply want to tidy an edge. The output width field is separate and worth understanding: cropping chooses a region, but the pixel dimensions of that region depend on how it is displayed, so specifying the final width is what actually guarantees a specific size.

Frequently asked questions

Will cropping reduce the file size?

Yes, usually noticeably, because a smaller image needs proportionally less data. The saving is often larger than you expect when you remove a large plain area such as sky.

Does cropping lose quality?

No. Cropping only discards pixels and does not recompress what remains, so what you keep stays exactly as sharp as it was.

Should I crop before or after resizing?

Crop first, then resize. Cropping reduces the amount of data, and resizing the smaller image is faster and produces a cleaner result than cropping a heavily downscaled version.

What is a good aspect ratio for social media?

1:1 for a feed post, 4:5 or 9:16 for stories and vertical feeds, and 16:9 for video thumbnails and banners. The social media resize tool produces all of them from one image.

Can I undo a crop?

Simply add the original file again. This tool works on the image you give it, so nothing is permanently altered until you download the result.

Are my images uploaded?

No, cropping happens on a canvas inside your browser.

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Private by design. Your files are processed on this device and are never uploaded to the 1xmobcas.com server. Use crop image offline with total confidence.