📐 按比例缩放 PDF 页面Resize PDF
按比例缩放 PDF 每页内容与页面尺寸。本地处理。可设置「打开密码」、「缩放 %」。Scale every PDF page (content and page size) by a percent. Processed locally. Settings: Password, Scale %.
使用说明与常见问题How-to & FAQ
「按比例缩放 PDF 页面」是什么？What is the Resize PDF tool?
按比例缩放 PDF 每页内容与页面尺寸。本地处理。可设置「打开密码」、「缩放 %」。Scale every PDF page (content and page size) by a percent. Processed locally. Settings: Password, Scale %.
如何使用「按比例缩放 PDF 页面」？How do I use the Resize PDF tool?
在「按比例缩放 PDF 页面」中，选择或拖入文件，按需设置「缩放 %」等选项，然后点击「缩放」按钮即可。加密的 PDF 会提示输入密码（出现「打开密码」栏和「打开」按钮），输入密码并点「打开」后再继续。In the Resize PDF: Choose or drop your files, set "Scale %", then click "Resize". For an encrypted PDF, the page asks for its password (a Password field and an Open button appear) — enter it, click Open, then continue.
页面内容会怎样？What happens to the page content?
页面尺寸和上面的内容一起按比例缩放，排版和相对位置不变，只是整体变大或变小。缩放比例可设 10%–400%。The page size and its content scale together, so the layout and relative positions stay the same; everything just becomes larger or smaller. The scale can be 10% to 400%.
书签和文档信息会保留吗？Are bookmarks and document info kept?
会。页面直接在原文件上缩放，书签、文档信息（标题、作者等）和链接都会保留，链接区域和批注随页面一起缩放。加了密码的 PDF 解锁后会另存为新文件，这时书签和文档信息不会保留，完成提示里会说明。Yes. The pages are scaled inside the original file, so bookmarks, document info (title, author and so on) and links are kept, and link areas and annotations scale with the page. A password-protected PDF is saved as a new unlocked file, which does not keep bookmarks or document info; the result message says so.
能改成 A4 或 Letter 吗？Can I change pages to A4 or Letter?
本页只按百分比（10–400%）等比缩放，不改变页面比例。例如 A4 缩放 50% 得到 297.6 × 420.9 pt。生成后修改百分比会自动重新缩放。This page only scales by a percentage (10–400%) and keeps each page's proportions; for example A4 at 50% becomes 297.6 × 420.9 pt. After the first run, editing the percentage rescales automatically.
有哪些选项可以调整？What options can I adjust?
「按比例缩放 PDF 页面」的设置：「打开密码」可留空；「缩放 %」默认 50；可选文件：PDF。每次生成结果都按当前设置处理。Settings in the Resize PDF — "Password" optional; "Scale %" default 50; files: PDF. The result always uses the current settings.
「按比例缩放 PDF 页面」免费吗？需要注册吗？Is the Resize PDF free? Do I need an account?
「按比例缩放 PDF 页面」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 Resize PDF is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.