Circular Avatar Crop
Crop an image into a circular PNG avatar
Circular Avatar Crop — what it does
Load a photo, choose an output size and this tool crops it to a perfect circle and exports a PNG. You can keep the area outside the circle transparent, or fill it with a background colour for platforms that render avatars as squares. The crop is centred and square-safe, so tall or wide source photos are handled without distortion.
When this tool helps
- Making a profile picture for a forum, chat app or company directory that expects a circular avatar.
- Preparing consistent round headshots for a team page so every portrait aligns at the same size.
- Turning a logo into a round app-style icon for a presentation or a slide deck.
How to use it
- Choose the image file to crop.
- Set the avatar size in pixels.
- Pick a background colour, or tick transparent background.
- Process the image and download the PNG.
Accuracy, limits, and good practice
- Export as PNG whenever you need transparency — JPG has no alpha channel, so the corners fill with solid colour.
- Sizes between 256 and 512 pixels suit most platforms; larger uploads are usually downscaled by the service anyway.
- The subject's face should sit near the centre of the source image, since the crop takes the middle square rather than detecting faces.
Frequently asked questions
Can I choose which part of the photo is used?
This tool takes the centred square. Crop to the region you want first with the crop tool, then run it through here.
Why does my avatar still look square?
Some platforms apply their own mask. A transparent PNG shows correctly in most places, but a service that flattens onto white will reveal the corners.
Does upscaling a small photo help?
No. Setting an output size larger than the source only enlarges existing pixels and makes the result look soft.
Related tools on this site
- SVG to PNG — Render SVG files as high-resolution PNG images
- Image to ASCII Art — Convert an image into copyable text-based ASCII artwork
- Image EXIF Viewer — Inspect image dimensions and available camera metadata
Everything above runs inside this page. Circular Avatar Crop needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
圓形頭像裁切能做什麼
載入照片、設定輸出尺寸，工具會把它裁成正圓並輸出 PNG。圓形以外的區域可以保持透明，也可以填上背景色，以配合把頭像顯示成方形的平台。裁切以置中方形為基準，直式或橫式來源照片都不會變形。
什麼時候用得上
- 為論壇、通訊軟體或公司通訊錄製作圓形大頭貼。
- 為團隊頁面準備一致的圓形人像，讓每張照片尺寸對齊。
- 把商標做成圓形 App 風格圖示，用於簡報投影片。
使用步驟
- 選擇要裁切的圖片檔。
- 設定頭像的像素尺寸。
- 選擇背景色，或勾選透明背景。
- 執行處理並下載 PNG。
精確度、限制與實務建議
- 需要透明背景時務必輸出 PNG；JPG 沒有 alpha 色板，四角會填成實色。
- 多數平台用 256 至 512 像素就夠，上傳更大的圖通常也會被服務端縮小。
- 主體臉部應盡量靠近原圖中央，因為裁切取的是中央正方形，並不會自動偵測人臉。
常見問題
可以自己選要取哪一塊嗎？
本工具固定取置中方形。請先用裁切工具切到想要的範圍，再送進這裡處理。
為什麼頭像看起來還是方的？
有些平台會套用自己的遮罩。透明 PNG 在多數地方正常，但若服務端把圖平坦化到白底，四角就會顯現。
把小圖放大有用嗎？
沒有。輸出尺寸大於原圖只是把既有像素放大，結果會偏糊。
本站相關工具
- SVG 轉 PNG — 將 SVG 向量圖輸出為高解析 PNG
- 圖片轉 ASCII 字元畫 — 將圖片轉換為可複製的文字字元畫
- 圖片 EXIF 檢視器 — 查看圖片尺寸與可用的相機中繼資料
以上步驟全部在這個頁面內完成，圓形頭像裁切 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。