🗂️ PDF 转 TIFFPDF to TIFF Converter

使用说明与常见问题How-to & FAQ

「PDF 转 TIFF」是什么？What is the PDF to TIFF Converter tool?

把 PDF 转换为 TIFF 图像：可合并成一个多页 TIFF 或每页单独保存，支持 LZW 无损压缩、彩色或灰度、72–600 DPI，写入分辨率信息，适合传真、存档和印刷流程。Convert a PDF into TIFF images — one multi-page TIFF or a file per page, with lossless LZW compression, color or greyscale and 72–600 DPI with resolution tags written. Suited to fax, archiving and print workflows.

如何使用「PDF 转 TIFF」？How do I use the PDF to TIFF Converter tool?

在「PDF 转 TIFF」中，按需设置「分辨率」、「颜色」、「压缩」、「页码（留空为全部）」等选项，然后点击「转换为 TIFF」、「全部下载（ZIP）」按钮即可。支持拖放文件。加密的 PDF 选好后会先出现「打开密码」栏和「打开」按钮，输入密码点「打开」后再继续。In the PDF to TIFF Converter: Set "Resolution", "Color", "Compression", "Pages (empty = all)", then click "Convert to TIFF", "Download all (ZIP)". Drag-and-drop files is supported. For an encrypted PDF, a Password field and an Open button appear after you choose it — enter the password and click Open first.

什么是多页 TIFF？What is a multi-page TIFF?

TIFF 格式可以在一个文件里保存多张图片（页），传真软件、扫描归档系统和很多 OA 流程都使用这种格式。取消勾选则每页单独保存为一个 .tif 文件。TIFF can store several images (pages) in one file; fax software, scan archives and many office workflows rely on it. Untick the option to save each page as its own .tif file.

LZW 压缩会损失画质吗？Does LZW lose quality?

不会。LZW 是无损压缩（配合水平差分预测），解压后像素与原图完全一致，几乎所有看图软件和 Office 都支持；选择“不压缩”兼容性最强但文件很大。No. LZW (with horizontal differencing) is lossless — pixels are identical after decompression — and almost every viewer and Office suite supports it. Uncompressed is the most compatible but very large.

分辨率（DPI）怎么选？Which resolution (DPI) should I pick?

72–96 DPI 适合在屏幕上查看或网页使用，150 DPI 是清晰度和体积的平衡点，200–300 DPI 适合打印或需要放大细节，600 DPI 文件会非常大。A4 页面在 150 DPI 下约为 1240×1754 像素。72–96 DPI suits screens and the web, 150 DPI balances clarity and size, 200–300 DPI is for printing or zooming in, and 600 DPI files are very large. An A4 page at 150 DPI is about 1240×1754 pixels.

加密的 PDF 可以处理吗？Can it handle password-protected PDFs?

可以。如果 PDF 需要打开密码，会提示你输入；只有权限限制（无打开密码）的文件会自动打开。输出文件不再带密码，如需加密请使用“PDF 加密”工具。Yes. If the PDF needs an open password you'll be asked for it; files with only permission restrictions open automatically. The output is not password-protected — use the Protect PDF tool if needed.

文件会上传到服务器吗？Are my files uploaded?

不会。PDF 在你的浏览器里用 pdf-lib / pdf.js 处理，文件不会离开你的设备，关闭页面后不留存任何数据。No. The PDF is processed in your browser with pdf-lib / pdf.js; files never leave your device and nothing is kept after you close the page.

「PDF 转 TIFF」免费吗？需要注册吗？Is the PDF to TIFF Converter free? Do I need an account?

「PDF 转 TIFF」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 PDF to TIFF 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.