图片调整大小 像素 · 百分比 · 缩放 · 填充

Resize photos to exact pixels or by percentage without installing software. Lock the aspect ratio, scale to fit a canvas, or add padding when a platform wants a fixed box.

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将图片拖放到此处或点击浏览

每批最多 10 张（每张 10MB）。下载或分享后清除队列，随时开始下一批。支持 JPG、PNG、WebP、AVIF、HEIC、GIF、BMP、SVG、TIFF。

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活跃分享 48 小时后自动删除 · 最多保存 50 MB

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它是如何运作的

1

上传

添加要调整大小的图片。

2

选择调整方式

选像素以设置精确宽高，或选百分比按比例缩放。

3

设置尺寸

输入目标大小，选择缩放适应或填充适应。

4

下载

保存调整后的图片或分享链接。

When you should resize (not compress)

Use resize when a website, app, print shop, or social network asks for a specific width and height. Compressing alone reduces file weight but leaves the pixel dimensions unchanged — forms that reject “image too large” usually mean pixels, not kilobytes.

Pixels vs percent

Pixels are best when you know the target (for example 1080×1080 or 1920×1080). Percent is faster when you only need something half / 70% / double the original for a quick draft. Keep aspect ratio locked unless you intentionally need a stretch.

Fit modes that avoid ugly stretch

  • Scale — sizes the whole image to your width/height; may leave empty space if only one side is constrained.
  • Padding — keeps the full image visible and fills unused canvas with color or transparency (useful for logos and product shots).
  • Crop after resize — when a platform crops from the center, set the final ratio first with the crop tool, then export.

Quality tips

Downscaling usually stays sharp. Upscaling invents pixels and softens detail — enlarge only when a site refuses a small file, and prefer PNG/WebP for graphics with text. Soft export: JPG quality 80–90 for photos, PNG for screenshots with UI.

Privacy: preview runs in your browser. Choose Download to keep the file on your device, or Share for a temporary link (active shares auto-delete within 48 hours). See our privacy policy.

常见问题

Often yes — fewer pixels usually means a smaller file — but if you need a hard KB/MB limit, use Compress after you set the dimensions.
Yes. Upload HEIC/HEIF, set the pixel size, then download as JPG or PNG if the destination does not accept HEIC.
Set 1080×1080 (or the story/reel size you need), use padding or crop the subject manually so faces stay centered, then download.
Up to 10 images per batch (10 MB each). Download or share, clear the queue, and start another batch anytime.
Browser export creates a new image file; location and camera metadata from the original are typically not preserved — intentional for privacy on shared links.
可以调整 JPG、JPEG、PNG、WebP、AVIF、BMP、GIF、TIFF 和 SVG 图片的大小。调整后的图片可以原格式下载，也可以转换为其他格式。
我们的调整工具使用高质量重采样算法，以保持清晰度和色彩准确度。为获得最佳效果，请避免将图片放大到超过原始尺寸的 2 倍，否则可能出现柔和模糊。
每张图片最大 10MB。每批最多处理 10 张图片，然后导出并随时开始下一批。导出的文件在 My Files 中最多保留 48 hours。