尺寸减小 50%，同时保持 2:1 的比例。
在您的浏览器中本地处理对于此工具，所选输入将在浏览器中处理。并非为了核心操作而故意上传到Get Tools Lab。
图像工具
图片尺寸调整
快速回答在浏览器中将图像大小调整为本地精确的像素尺寸。当您想避免拉伸时，请保持纵横比。
选择图像。
使用方法 图片尺寸调整
- 1选择图像。
- 2调整尺寸、质量或编辑选项。
- 3预览或在浏览器中处理它。
- 4下载完成的图像。
About 图片尺寸调整
直接在浏览器中使用此工具，提供清晰选项，并在可用时进行本地隐私处理。 Use it when you need the result without the overhead of opening a larger application. For anything important, compare the output with your source and keep the original until you are satisfied with the result.
Resize to the size you will actually display
Large camera images are often far bigger than a website, document or message needs. Reducing pixel dimensions can save more bytes than aggressive compression while keeping the image visually clean.
Keep the aspect ratio locked for ordinary photos. If width and height are changed independently, faces, circles and logos can stretch. Upscaling also has limits: more pixels do not recreate missing detail.
A realistic example
If a 4000×3000 photo will appear at about 1200 pixels wide, a 1200×900 copy is a sensible starting point before compression.
When this tool is not the right fit
If you need to recover detail from a tiny source image, simple resizing is not the same as true image restoration.
这个工具的作用
调整图像大小会更改像素尺寸，同时保留或调整图像纵横比。
常见用例
- 创建社交媒体尺寸
- 缩小超大照片
- 准备缩略图
- 匹配所需的像素尺寸
限制
- 放大无法重新创建原始图像中不存在的细节。
- 单独更改宽度和高度可能会使图像变形。
隐私和处理
在您的浏览器中本地处理
对于此工具，所选输入将在浏览器中处理。并非为了核心操作而故意上传到Get Tools Lab。
结果示例
如果结果看起来不正确
- 为普通照片启用宽高比。
- 当质量很重要时，避免重复调整大小/导出周期。
Last tested: 2026-09-03
V50 deterministic render, static JS/control audit and responsive layout checks
- ✓ PHP page renders without a fatal/parse error
- ✓ Primary controls and labels are present
- ✓ Invalid or missing input has a recoverable error path
- ✓ Responsive layout checked at 390px and 1365px in V50 local QA
- ✓ Keyboard focus and status region are available
信任、方法和更正
Get Tools Lab 记录了如何设计、审查和纠正工具。除非有明确记录，否则我们不会要求外部认证。
Answers about 图片尺寸调整
What does 图片尺寸调整 do?
直接在浏览器中使用此工具，提供清晰选项，并在可用时进行本地隐私处理。
Will 图片尺寸调整 change the original file?
The tool creates a new output for you to review. Keep the original until you have checked the result, especially when layout, image quality, metadata, or page order matters.
What is a common reason to use 图片尺寸调整?
A common use is to finish the image resizer task quickly without opening a larger desktop application.
What should I watch out for when using 图片尺寸调整?
Check the input format and review the output before replacing an original file or using the result in an important workflow.
How do I get a better result with 图片尺寸调整?
开始 with a clean input, use the simplest settings that meet your goal, and compare the result with the original before you download or reuse it.
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查看所有指南 →相关指南
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学习如何安全高效地使用JPG转PNG。
阅读指南 →JPG 转 PNG: 实用技巧和常见错误
使用 JPG 转 PNG 获得更好效果的实用技巧。
阅读指南 →此设备上不公开
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