PDF 指南
在浏览器中合并、旋转、提取和编排 PDF 页面。
How to Convert Images to PDF
Applications want one PDF; your camera produces JPEGs. Convert a set of images into a properly paginated PDF in a few clicks — A4 or Letter, nothing uploaded.
How to Add Page Numbers to a PDF
Unnumbered PDFs are miserable to cite and to print. Number every page in seconds, with control over position, alignment and where the count starts.
How to Extract Specific Pages From a PDF
Send only the two pages that matter, split a long report, or pull out a signed page — with visual page selection and no software to install.
How to Rotate PDF Pages Online
Scans and phone photos often land sideways inside PDFs. Rotate all pages or just a page range in a few clicks, then renumber and recombine the document.
How to Merge PDF Files for Free
Join contracts, scans and reports into a single PDF — in the right order, without uploading anything. A step-by-step guide plus the follow-up steps most people forget.