调整 PDF 大小
将每一页调整为适配 A4、Letter 或 Legal 纸张。
使用方法
上传您的 PDF，选择 A4、Letter 或 Legal，然后下载结果——每一页都会居中缩放以适配，且不会变形。
调整大小会使内容变形吗？
不会——页面会按比例缩放以适配新纸张尺寸，再居中放置，不会出现变形拉伸。如果原始宽高比不完全匹配，可能会留出额外的边距。
我可以调整为自定义尺寸，而不仅是 A4/Letter/Legal 吗？
目前还不支持——此工具覆盖的是三种最常用的标准纸张尺寸。
Will resizing crop any content off the page?
No — pages are scaled down or up to fit within the new size, not cropped, so all original content stays visible.
Can different pages in my PDF end up different target sizes?
No — one target size applies to every page in the output file.
Does resizing affect image or text quality?
Content is scaled proportionally as vector/raster data, not re-rendered at low resolution, so quality holds up well at normal size changes.
Can resizing make small pages bigger, not just shrink them?
Yes — if your PDF's pages are smaller than the size you pick, they scale up to fill it, the same as oversized pages scale down. Enlarge a page a lot and any embedded images can look a bit softer, since the same pixels now cover more paper, but nothing gets stretched or distorted.