Image Resizer

调整和裁剪图片大小。

Drop images here or click to upload

JPG, PNG, WebP · up to 50 images · 0/50 selected

Resize & Crop

Change dimensions with aspect ratio lock.

Batch Mode

Resize multiple images at once.

Download

Save resized images instantly.

Client-side

All processing in your browser. No data uploaded.

关于Image Resizer

The Image Resizer lets you change the pixel dimensions of your photos and graphics instantly, right in the browser. Whether you need to scale images down for email attachments, resize thumbnails for a web gallery, or prepare assets to meet a platform's exact dimension requirements, this tool handles it all without any software installation. You can resize by percentage (e.g., 50% to halve the dimensions), by a fixed target width, or by a fixed target height — the aspect ratio is always preserved automatically to prevent distortion. Batch mode lets you apply the same resize settings to up to 50 images at once, saving enormous time compared to doing each file individually. The original file format is preserved (JPEG stays JPEG, PNG stays PNG, WebP stays WebP), and you can download results one by one or as a single ZIP archive. Processing happens entirely on your device, so there are no file size limits imposed by server-side APIs and your images remain completely private.

如何使用Image Resizer

  1. Click the upload area or drag and drop one or more images onto the drop zone — up to 50 files at once.
  2. Choose a resize mode: "Scale %" to resize proportionally, "Max width" to set a target width, or "Max height" to set a target height.
  3. Enter the target value using the slider (for percentage) or the number input (for pixel dimensions).
  4. All images will resize automatically. Review the original and new dimensions shown next to each file.
  5. Click "Download" next to a single image to save it, or "Download all" to export all resized images as a ZIP.
  6. Click "Clear all" to start a new batch when finished.

常见问题

Does resizing preserve the aspect ratio?

Yes. When you set a target width or height, the other dimension is calculated automatically to maintain the original aspect ratio and prevent stretching.

Can I enlarge images as well as shrink them?

Yes. The percentage slider goes up to 200%, and you can enter any pixel value for width or height. Note that enlarging a raster image may cause it to appear blurry.

What image formats are supported?

JPEG, PNG, WebP, GIF, BMP, and most other browser-readable raster formats. The output format matches the original file type.

Are my images sent to a server?

No. All resizing is done locally in your browser using the HTML5 Canvas API. Your images never leave your device.

How do I resize images to specific social media dimensions?

Select "Max width" mode and enter the required width (e.g., 1200 for Twitter, 1080 for Instagram). The height will adjust automatically while keeping the aspect ratio.

Image Resizer 完全使用指南与免费在线工具

无需安装、完全免费、纯前端本地运行的高效 Image Resizer 工具

用于快速解决：调整和裁剪图片大小。。无需安装复杂软件，打开网页即可立即使用，极速且安全。

为什么选择 Metoolzy 的 Image Resizer？

  • 秒级即时响应: 极致性能优化，输入即可见结果。
  • 数据绝对安全: 纯浏览器本地计算，数据绝不上传服务器。
  • 完全免费使用: 无需注册登录，无任何隐形消费。

三步快速上手

  1. 打开 Metoolzy Image Resizer 工具页面。
  2. 在输入区粘贴或上传您的数据。
  3. 即时查看处理结果并点击复制或下载。

功能对比表

对比项 Metoolzy Image Resizer 普通在线工具 本地客户端软件
使用成本 永久免费 有次数限制或收费 需购买授权
隐私保护 纯本地内存运行 数据需上传云端 本地运行

适用人群与应用场景

  • 软件开发人员日常调试与数据转换
  • UI/UX 设计师资产处理
  • 运营与办公人员效率提升

常见问题解答 (FAQ)

处理的数据会被记录或保存吗？

绝不会。所有运算均在您的浏览器本地完成，没有任何数据回传。