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在线扫描文档

将页面照片转换为清晰、端正的扫描件——检测边缘、修正透视并保存为 PDF,免费,直接在浏览器中完成。

拖入文档照片

拖放、粘贴或选择文件

JPG · PNG · WebP — 在您的设备上扫描

100% 免费无水印无需注册 PDF · PNG output

常见问题

这款文档扫描仪是免费的吗?

是的——完全免费,无水印,无需注册。您可以扫描任意数量的文档并将其保存为 PDF 或 PNG。

它如何将照片转换为扫描件?

它会找出照片中文档的四个角——自动识别或由您手动拖动——然后应用透视校正,使页面变成平整的矩形,就像平板扫描仪扫出的效果。之后,增强滤镜会对其进行清理。

它能自动检测文档边缘吗?

能。点击“自动检测边缘”,工具会自动找出页面轮廓。边缘检测引擎在首次使用时加载;如果无法加载,您仍可手动放置四个角点,扫描效果完全相同。

什么是透视校正(去歪斜)?

当您从角度拍摄页面时,它看起来像梯形而非矩形。透视校正(也称去歪斜)将梯形重新映射为干净的矩形,消除倾斜,使文档可以正面阅读。

我可以将扫描件保存为 PDF 吗?

可以。选择 PDF 可导出单页文档——适配 A4、美国信纸,或精确匹配扫描尺寸。如果只需要校正后的图片,请选择 PNG。

黑白模式有什么用?

黑白(和魔法彩色)滤镜能增强对比度,使文字清晰易读,纸张看起来洁白干净——这是扫描文档的经典外观。灰度和原图模式同样可用。

我的图片在哪里处理?

扫描在您的浏览器中完成,因此新文件直接在您自己的设备上生成。有关该工具相关数据的处理方式,请参阅我们的隐私政策。

在手机上也能使用吗?

可以。扫描仪在手机和平板电脑上均可使用——拍一张页面照片,用手指拖动角点,然后下载 PDF。角点控制点支持触控操作,预览即时更新。

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