Voice Recorder vs PDF转换器，极致压缩

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QPDF 是一款强大的本地 PDF 转换与处理工具，支持扫描文档、图片转 PDF、压缩、添加水印、合并多个 PDF、OCR 文字识别等功能。所有处理均在设备本地完成，您的文件安全无忧。 核心功能】 扫描文档 - 使用相机智能扫描纸质文档，自动检测边缘 - 扫描结果一键转为高质量 PDF 图片转 PDF - 从相册选择多张图片，快速生成 PDF - 支持拖拽排序，自由调整页面顺序 - 支持 A4、Letter、自适应三种页面尺寸 PDF 压缩 - 智能压缩算法，有效减小文件体积 - 低/中/高三档质量可选，实时预览压缩效果 - 压缩前后大小对比，一目了然 添加水印 - 支持文字水印，自定义内容、字号、透明度、颜色 - 对角线/居中/平铺三种布局模式 - 实时预览水印效果，所见即所得 合并 PDF - 选择多个 PDF 文件，拖拽排序后一键合并 - 合并后可继续添加水印或压缩 OCR 文字识别 - 从图片中提取文字，支持复制和分享 - 支持中英文识别 【产品特点】 - 纯本地处理：所有文件操作在设备上完成，数据不上传云端 - 零第三方依赖：无广告、无追踪、无数据收集 隐私承诺 我们不收集任何个人数据。无分析工具。无广告。您的数据只属于您。 - 隐私政策：https://grandiose-money-076.notion.site/QPDF-33d87ce015a0806e8cfde01a5aa4946b - 使用条款：https://grandiose-money-076.notion.site/QPDF-33d87ce015a08082a27ec7d924862ff1