图像尺寸调整器
将图像调整为精确的像素尺寸。可选择社交媒体预设，或自定义宽度和高度。锁定宽高比防止失真。
🔒 100% 隐私保护⚡ 无需上传🆓 永久免费
How to use 图像尺寸调整器
Steps
- Upload the image you want to resize.
- Enter exact width and height values or use a common preset.
- Keep aspect ratio locked unless you intentionally need to stretch the image.
- Export the resized image in the format that matches your target platform.
Example use case
A 4000 px wide camera photo can be resized to 1600 px for a blog article, reducing page weight while keeping enough resolution for high-density screens.
Settings explained
- Width and height define the exported pixel dimensions.
- Aspect ratio lock prevents faces, logos, and product photos from being distorted.
- Format and quality settings control the final download size after resizing.
Limitations
- Upscaling a small image cannot add real detail.
- Tiny text or thin lines may become less readable after aggressive downsizing.
- Browser memory can limit extremely large source images.
Troubleshooting
- If the image looks stretched, turn aspect ratio lock back on.
- If the image is soft, resize from the original file instead of a previously compressed version.
- If the export is too large, combine resizing with WebP or JPG compression.
常见问题
- Can I resize for social media?
- Yes. Resize to exact pixel dimensions for thumbnails, posts, banners, and profile images.
- Does resizing reduce quality?
- Downsizing usually keeps visual quality well. Upscaling may look soft because it cannot create new detail.
- 这个工具真的免费吗？
- 是的！我们的工具完全免费使用。无需注册、无需信用卡、无隐藏费用。所有图像处理都在你的浏览器中完成。
- 我的图像会上传到服务器吗？
- 不会。本站的每个工具都完全在你的浏览器中使用 Canvas API 处理图像。你的图像永远不会离开你的设备。这意味着无需上传、无需服务器，完全保护隐私。
- 支持哪些图像格式？
- 我们支持 JPG、PNG、WebP、AVIF、BMP、GIF、SVG 等格式。具体的输入和输出格式因工具而异。
- 可以一次处理多张图像吗？
- 部分工具支持批量处理。请在工具页面上查找"📦 批量处理"标识。