PDF 信息与尺寸
UpBox优盒工具箱,免费在线 PDF 信息查询,本地读取页数、页面尺寸、方向与标题元数据,文件不上传,可逐页核对尺寸。
无需注册 · 数据不上传No sign-up · nothing uploaded
PDF 文件PDF file
选择文件后自动读取
尺寸按 PDF 内部点数换算为毫米(1 pt = 0.3528 mm),A4 约为 210 × 297 mm;本工具只读文件结构,不提取正文
本工具所有运算在本地浏览器完成,你的文件、文本不会上传到服务器
工具介绍
打印前要确认纸张、排版前要确认画布,第一件事都是知道这份 PDF 到底几页、每页多大。选中文件,页数与尺寸立刻读出来。 Before printing or laying out, you need to know how many pages a PDF has and how large each one is. Pick the file and both appear immediately.
逐页表格会标出每页是 A4、Letter 还是自定义尺寸,横竖方向也一并附上,便于判断扫描件是否混排。 The per-page table marks A4, Letter or a custom size for each page, with orientation, so mixed scans are easy to spot.
- 页数统计Page count
- 尺寸识别Size detection
- 逐页列表Per-page list
- 标题元数据Title metadata
- 本地解析Local parsing
使用说明
- 选择本地 PDF。Choose a local PDF.
- 自动解析结构。Structure is parsed locally.
- 查看页数与尺寸。Check pages and sizes.
- 对照逐页表格核对。Compare the per-page table.
常见问题
会读取 PDF 正文吗?Does it read the text?
不会,只读页面结构与元数据,正文内容不解析也不上传。No, only page structure and metadata; the text is never parsed or uploaded.
加密 PDF 能用吗?Do encrypted PDFs work?
会被提示需要先解密,避免读到错误信息。It asks you to decrypt first so it never shows misleading results.
尺寸为什么和标称不同?Why does the size differ from the label?
PDF 用点作单位,换算成毫米会有小数误差,误差在 3 pt 内仍会识别为对应纸张。PDFs use points, so millimetre values carry rounding; a match within 3 pt is treated as that paper size.
支持批量吗?Batch support?
一次一份,方便逐份核对打印参数。One file at a time.