在线调整图片大小
为什么要调整图片大小？
在上传到网站、表单、商店或门户前调整图片宽度和高度
准备头像、缩略图、横幅、帖子图片和文档图片
减小大照片尺寸，方便邮件、聊天和更快速分享
保持原始宽高比，避免图片被拉伸或变形
在同一个流程中调整多张图片，而不是逐张手动编辑
下载无水印、无额外品牌标记的清晰图片文件
3 步调整图片大小
图片尺寸工具可以做什么
按像素调整
当网站、表单、市场平台或设计需要指定尺寸时，可设置精确宽度和高度。
按百分比调整
需要快速得到更小版本时，可按百分比缩小图片，无需手动计算尺寸。
保持宽高比
保留原始比例，避免调整后的图片被拉伸或变形。
制作社交尺寸
为头像、帖子、缩略图、横幅以及其他在线场景创建合适图片尺寸。
批量调整图片
上传多张支持的图片，并在同一个流程中应用尺寸设置。
下载干净结果
调整后的图片不会添加水印、Logo 或额外文字。
谁会使用在线图片尺寸工具？
社交媒体创作者
为有固定尺寸要求的平台准备帖子、头像、故事、缩略图和频道图片。
网站运营者
在发布前调整博客图片、落地页视觉、图库图片和文档截图。
电商卖家
让商品照片符合市场平台、目录和网店的尺寸要求。
办公与行政
为表单、门户和业务文档准备截图、扫描件、证件照和附件。
学生和教师
为作业、演示文稿、学习材料和上传限制调整图片大小。
日常分享
当原始照片尺寸过大时，让图片更容易发送、上传和保存。
为什么选择我们
我们注重转换质量、使用便捷性和多格式支持。
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常见问题
关于图片尺寸调整
图片尺寸调整的作用
调整图片大小会改变图片的像素尺寸。当表单、网站、市场平台、文档或社交媒体要求特定宽度和高度时，这非常有用。
调整尺寸不同于压缩。压缩主要减小文件体积，而调整尺寸会改变图片本身的宽度和高度。
像素、百分比和宽高比
按像素调整适合已知目标尺寸的场景，例如头像、缩略图、横幅或商品照片要求。
按百分比调整适合快速生成更小版本。保持宽高比可以保留原始比例，避免结果变形。
常见使用场景
用户常在发布网页、上传商品照片、准备社交帖子、填写表单或通过邮件发送附件前调整图片尺寸。
手机和相机拍摄的照片通常包含超过日常查看所需的像素。减小尺寸可以让图片更易上传、发送和保存。
适合日常使用的干净输出
好的在线图片尺寸工具应能快速改变尺寸，不添加水印，也不强制注册账号。
调整后的图片可直接用于文档、网站、社交资料、网店和共享文件夹。
