PDF Merge

Popular Free Local Processing

Free online PDF merge tool. Combine multiple PDF files into one in order. Files never uploaded, all browser-side processing, protecting your privacy. Supports drag-to-reorder and bookmarks.

Drag files here, or

Select PDF file

Up to 20, max each 100.0 MB

Options

Add bookmarks after merge

How to Use

1 Click "Select PDF files" or drag files to upload area
2 Drag files to adjust merge order
3 Optional: check "Add bookmarks after merge"
4 Click "Merge PDF" button
5 Download merged file after processing

FAQ

Q: Will files be uploaded to server?

No. All processing happens in your browser. Files never leave your device, fully protecting privacy.

Q: Is there a limit?

Free users can merge up to 20 PDF files, max 100MB each.

Q: What if processing is slow?

Large files take more time. Please wait for progress bar. Closing other memory-heavy tabs helps.

Q: Will quality degrade after merge?

No. PDF merge is lossless. Original content is fully preserved.

Related Guides

How to Merge PDF Files (Order + Common Pitfalls)
Standard practice for merging multiple PDFs and the common pitfalls.
腾讯文档批量处理：能批量做什么、不能批量做什么（诚实边界）
腾讯文档批量操作的真实边界：批量分享/收集可做，批量导出与格式转换的能力限制，以及本地批量工作流。