PDF Editor HQResize PDF Online Free - Change Page Size to A4 or Letter
Resize PDF online free — scale pages to A4, Letter, Legal or A5, or by percentage. Content is scaled and centered, orientation preserved. Processed in your browser, never uploaded.
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用完 Resize PDF 了？接下来试试这些
为您精选与 Resize PDF 搭配得当的工具。无需丢失文件，继续操作。
Crop PDF
Crop PDF pages online — drag a crop box on the preview and trim margins or unwanted edges from every page. Processed in your browser.
立即试用压缩 PDF
用质量预设压缩 PDF 文件大小，便于邮件和表单上传。免费，无每日任务限制、无需注册、无水印；文件在我们的服务器上安全处理并自动删除。
立即试用旋转 PDF
借助可视化缩略图，旋转每一页 PDF，或挑选单独的页面旋转 90°、180° 或 270°。免费、无需注册、无水印；文件在我们的服务器上安全处理并自动删除。
立即试用整理 PDF
拖动 PDF 页面重新排序，点击删除不需要的页面——重新排序、提取和移除一站搞定。免费，无需注册，无水印；文件在我们的服务器上安全处理并自动删除。
立即试用合并 PDF
将两个或多个 PDF 文件合并为一个，拖动即可重新排序。免费使用，无每日任务限制、无需注册、无水印——文件在我们的服务器上安全处理并自动删除，绝不存储或出售。
立即试用图片转 PDF
将多张 JPG、PNG、WEBP 或 HEIC 图片合并为一份多页 PDF。可拖动重新排序，下载前先预览。
立即试用常见问题
Upload the PDF and choose A4 — every page is scaled proportionally and centered on an A4 page, keeping its orientation. Then download the resized file. Letter, Legal, A5 and custom percentage scaling work the same way.
usageResizing changes page dimensions, not primarily the byte size. To shrink the file for email or upload portals, use Compress PDF — or do both: resize first, then compress.
featuresNo — pages scale proportionally to fit the target and are centered, so nothing is stretched. Landscape pages automatically get a landscape target.
qualityPrint shops, government portals and archives often require A4 or Letter. Mixed-size PDFs (e.g. merged from different sources) print badly until normalized to one size.
usageNo — resizing runs entirely in your browser with pdf-lib; the document never leaves your device.
privacyResize PDF 如何助您完成任务
它每天都在解决真实的问题——服务企业、创作者和日常任务。找到适合您的用例，几秒即可开始。
Normalize Merged Documents to One Size
A PDF merged from different sources prints badly with mixed page sizes — resize everything to A4 or Letter first.
Meet Portal and Print-Shop Requirements
Government portals, journals and printers frequently mandate an exact page size — convert your PDF to A4/Letter/Legal to pass validation.
Shrink Oversized Architect and Poster Pages
Scale down A1/A2 exports to A4 handouts, keeping proportions intact for review copies.
Enlarge Small Pages for Readability
A5 booklets and receipts scale up to A4 cleanly for annotation, filing or accessibility.