🗂️ TIFF 转 PDF（多页扫描件）TIFF to PDF Converter
把 TIFF/TIF 文件（包括扫描仪和传真生成的多页 TIFF）转换为 PDF：每页一页，按 TIFF 记录的 DPI 还原真实纸张尺寸，支持 LZW、Deflate、PackBits、CCITT 传真压缩，黑白和灰度页无损保存，本地完成。Convert TIFF/TIF files — including multi-page scans and faxes — to PDF, one page per image, restoring the real paper size from the stored DPI. Handles LZW, Deflate, PackBits and CCITT fax compression and stores black-and-white and grayscale pages losslessly, all locally.
使用说明与常见问题How-to & FAQ
「TIFF 转 PDF（多页扫描件）」是什么？What is the TIFF to PDF Converter tool?
把 TIFF/TIF 文件（包括扫描仪和传真生成的多页 TIFF）转换为 PDF：每页一页，按 TIFF 记录的 DPI 还原真实纸张尺寸，支持 LZW、Deflate、PackBits、CCITT 传真压缩，黑白和灰度页无损保存，本地完成。Convert TIFF/TIF files — including multi-page scans and faxes — to PDF, one page per image, restoring the real paper size from the stored DPI. Handles LZW, Deflate, PackBits and CCITT fax compression and stores black-and-white and grayscale pages losslessly, all locally.
如何使用「TIFF 转 PDF（多页扫描件）」？How do I use the TIFF to PDF Converter tool?
在「TIFF 转 PDF（多页扫描件）」中，按需设置「页面大小」、「方向」、「页边距 (0–50 mm)」、「图片压缩」、「JPEG 质量 (30–100)」等选项，然后点击「生成 PDF」、「清空」按钮即可。支持拖放文件。In the TIFF to PDF Converter: Set "Page size", "Orientation", "Margin (0–50 mm)", "Image compression", "JPEG quality (30–100)", then click "Create PDF", "Clear". Drag-and-drop files is supported.
多页 TIFF 会全部转换吗？Are multi-page TIFFs fully converted?
会。扫描仪、传真和部分软件把多页文档存成一个 TIFF，本工具会把每一页都转成 PDF 的一页（最多 500 页），缩略图（子图像）会被忽略。Yes. Scanners, fax software and some apps save multi-page documents as one TIFF; every page becomes a PDF page (up to 500), while embedded thumbnails are skipped.
支持哪些 TIFF 压缩方式？Which TIFF compressions are supported?
支持无压缩、LZW、Deflate/ZIP、PackBits、CCITT G3/G4 传真压缩以及大多数 JPEG 压缩的 TIFF，位深 1/8/16 位、RGB/灰度/调色板/CMYK（CMYK 会转换为 RGB）。极少数专用格式（如 32 位浮点图）可能无法解码，会给出提示。解码组件为 UTIF.js（MIT 许可）。Uncompressed, LZW, Deflate/ZIP, PackBits, CCITT G3/G4 fax and most JPEG-compressed TIFFs, at 1/8/16-bit, in RGB, grayscale, palette or CMYK (converted to RGB). A few specialised variants (such as 32-bit float images) may not decode, and you'll be told. Decoding uses UTIF.js (MIT licence).
PDF 页面尺寸和原纸张一样吗？Will the PDF pages match the original paper size?
选“按图片尺寸”时会读取 TIFF 中记录的分辨率（DPI），例如 300 DPI 扫描的 A4 会还原成 210×297 mm 的页面；没有 DPI 信息时按 96 DPI 计算。With "Image size", the resolution (DPI) stored in the TIFF is used, so an A4 scanned at 300 DPI becomes a 210×297 mm page; without DPI information 96 DPI is assumed.
“无损”和“JPEG”有什么区别？What's the difference between Lossless and JPEG?
无损模式把像素原样压缩（类似 PNG，灰度图自动用灰度存储），画质完全不变，适合截图、文字扫描和线条图；JPEG 模式文件更小，适合照片。“自动”会按格式选择合适的方式。透明区域在无损模式下保留，JPEG 模式下填充白色。Lossless stores the pixels exactly (PNG-style compression; grayscale images are stored as grayscale), so quality is unchanged — best for screenshots, text scans and line art. JPEG gives smaller files and suits photos. Auto picks per format. Transparency is kept in Lossless mode and filled with white in JPEG mode.
图片会上传吗？Are my images uploaded?
不会。解码和生成 PDF 都在你的浏览器里完成（pdf-lib），图片不会离开你的设备。No. Decoding and PDF creation both happen in your browser (pdf-lib); your images never leave your device.
「TIFF 转 PDF（多页扫描件）」免费吗？需要注册吗？Is the TIFF to PDF Converter free? Do I need an account?
「TIFF 转 PDF（多页扫描件）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The TIFF to PDF Converter is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.