📄 PDF 转长图（多页拼成一张）PDF to Long Image

使用说明与常见问题How-to & FAQ

「PDF 转长图（多页拼成一张）」是什么？What is the PDF to Long Image?

把 PDF 的每一页从上到下拼接成一张长图片，方便发微信、朋友圈和手机浏览；可选页码范围、长图宽度、页间距和分隔颜色，支持加密 PDF，超长自动分段，导出 JPG / PNG，文件不上传。Join all PDF pages top-to-bottom into one long image for WeChat, social posts and phone reading. Choose a page range, width, gap and divider colour; password-protected PDFs work, and very long results split automatically. Export JPG or PNG; nothing is uploaded.

如何使用「PDF 转长图（多页拼成一张）」？How do I use the PDF to Long Image?

选择 PDF 文件（加密的 PDF 先输入密码），默认转换全部页面，也可以填写页码范围如“1-3,5”。选择长图宽度（推荐 1080 像素），点“生成并下载长图”。Choose a PDF (enter the password if it is protected). All pages are used by default, or enter a range such as 1-3,5. Choose the width (1080 px recommended) and press Generate & download.

长图太长微信发不了怎么办？The image is too long for WeChat — what now?

设置“每张最大高度”（例如 15000 像素），超出部分会自动分成几张并打包下载；或者把长图宽度调小一些。Set a maximum height per image (e.g. 15,000 px) to split automatically into a ZIP, or reduce the width.

转出来的文字不清楚？The text looks blurry — why?

把长图宽度改为 2000（高清），导出格式选 PNG。文字很小的 PDF 建议用更大的宽度。Pick the 2000 px (high-res) width and PNG. Use a larger width for PDFs with small text.

和“PDF 转 JPG”有什么不同？How is this different from PDF to JPG?

PDF 转 JPG 是每一页生成一张图片；PDF 转长图是把所有页面拼成一张，在手机上一滑到底，更适合分享。PDF to JPG makes one image per page; this tool joins all pages into one image you can scroll through on a phone — better for sharing.

「PDF 转长图（多页拼成一张）」免费吗？文件会上传吗？Is the PDF to Long Image free? Are my files uploaded?

「PDF 转长图（多页拼成一张）」完全免费，无需注册。PDF 和图片只在你的浏览器里处理，不会上传到任何服务器。The PDF to Long Image is free with no sign-up. PDFs and images are processed only in your browser and never uploaded.