PDF 处理与格式转换工具，支持合并、拆分、压缩与转换，适用于文档整理与合同归档。 浏览器本地处理、数据不上传、即开即用。A free online collection of PDF Tools tools. All processing runs in your browser, no upload, no registration.
PDFs usually carry the documents you least want to hand over: contracts, resumes, financial statements. Most online PDF sites require an upload first. Here everything runs locally on PDF.js and pdf-lib — the browser reads the byte stream directly, and merging or splitting rearranges page objects instead of re-rendering, so the original resolution, selectable text layer, bookmarks and hyperlinks all survive intact.
No. Files are read locally through the browser File API and all page operations happen in memory. The server never sees the content.
Yes. Merging recombines page objects rather than flattening to images, so the text layer, bookmarks and links are preserved.
Yes. If you know the open password, enter it in the decrypt tool to lift the restriction before editing.