Crop Image
Crop an image using precise pixel coordinates
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Crop Image — what it does
Crop an image by typing exact pixel coordinates: an X and Y origin plus a width and height. Numeric cropping is what you want when the result has to be precise and repeatable — the same region from a series of screenshots, or an exact box a template demands — rather than dragged by eye.
When this tool helps
- Cutting the same region out of a series of screenshots taken at identical dimensions.
- Removing a fixed header, sidebar or watermark strip from captured images.
- Producing an exact-size crop that a template or upload specification requires.
How to use it
- Choose the image.
- Enter the X and Y position of the crop's top-left corner.
- Enter the crop width and height.
- Download the cropped result.
Accuracy, limits, and good practice
- Coordinates start at zero in the top-left corner, and X plus width must stay within the image or the crop runs off the edge.
- Check the source dimensions first — a crop specified for a 2x retina capture will land in the wrong place on a 1x image.
- Cropping discards pixels permanently in the output; keep the original if the framing might need revisiting.
Frequently asked questions
How do I crop to a specific aspect ratio?
Choose width and height in that ratio — 1600 by 900 for 16:9 — and use the aspect ratio calculator to work out the pair.
Can I crop by dragging instead?
This tool is coordinate-based for precision. For visual selection, crop in an image editor and return here for exact adjustments.
Does cropping reduce file size?
Yes, fewer pixels means a smaller file, though the saving depends on the content of the region you keep.
Related tools on this site
- Batch Image Renamer — Rename image files with numbered patterns in a ZIP
- Image Collage Maker — Arrange multiple images into a downloadable grid
- Local Blur & Mosaic — Blur or pixelate a selected rectangular image area
Everything above runs inside this page. Crop Image needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
圖片裁剪能做什麼
以精確像素座標裁切圖片：輸入 X、Y 起點與裁切寬高。當結果必須精確且可重複時——例如從一系列截圖取出同一塊區域，或符合版型要求的方框——用數值裁切遠勝過用眼睛拖曳。
什麼時候用得上
- 從尺寸相同的一系列截圖中，切出同一塊區域。
- 移除擷取影像上固定的頁首、側欄或浮水印條。
- 產出版型或上傳規格要求的精確尺寸裁切圖。
使用步驟
- 選擇圖片。
- 輸入裁切左上角的 X 與 Y 座標。
- 輸入裁切寬度與高度。
- 下載裁切結果。
精確度、限制與實務建議
- 座標從左上角的 0 開始，X 加寬度必須落在圖片範圍內，否則會裁到邊界外。
- 先確認來源尺寸——為 2 倍解析度截圖設定的座標，用在 1 倍圖上位置會完全跑掉。
- 裁切會在輸出中永久捨棄像素，構圖可能還要調整就請保留原檔。
常見問題
怎麼裁成特定比例？
選擇符合該比例的寬高，例如 16:9 用 1600 乘 900；可用長寬比例計算器求出配對數字。
可以用拖曳的方式裁切嗎？
本工具以座標為主，追求精確。需要視覺框選時，可先在影像編輯器裁切，再回來做精確微調。
裁切會讓檔案變小嗎？
會，像素變少檔案就變小，實際幅度取決於保留區域的內容。
本站相關工具
以上步驟全部在這個頁面內完成，圖片裁剪 不需要註冊、不上傳檔案、也不經過伺服器，關閉分頁後不會留下任何資料。