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How it works
- 1
Add your PDF files
Drag and drop or browse to select the PDF files you want to combine. You can add more files at any time, even between existing ones.
- 2
Arrange files or individual pages
In Document mode, drag files to reorder them. Switch to Page mode to pick and arrange individual pages from any file — pages are color-coded by source document for easy identification.
- 3
Merge and download
Click Merge to combine everything into a single PDF. Bookmarks, hyperlinks, and form fields from each source document are preserved in the output.
Features
- Two merge modes
- Document mode combines entire files in your chosen order. Page mode gives you granular control — select, reorder, rotate, and duplicate individual pages from any source file.
- Page-level editing
- In Page mode, rotate pages by 90° increments, duplicate pages, or exclude specific pages before merging. Each page shows a thumbnail so you always know what you are working with.
- Color-coded source tracking
- When merging pages from multiple files, each source document gets a unique color. A legend shows which file each color represents, so you can identify pages at a glance.
- Insert files anywhere
- Add new files between existing ones — not just at the end. Click the insert button between any two items to add files exactly where you need them.
Frequently asked questions
- Is it safe to merge PDFs here?
- Yes. Your files never leave your device. All processing runs locally in your browser using WebAssembly — nothing is uploaded to a server.
- Is there a file size limit?
- There is no hard limit. Processing happens in your browser, so performance depends on your device's memory. Most documents up to several hundred megabytes work fine.
- Can I choose which pages to include?
- Yes. Switch to Page mode in the toolbar to see every page from all uploaded files. Select only the pages you want, reorder them by dragging, and rotate or duplicate any page before merging.
- Does merging preserve bookmarks and links?
- Yes. Internal bookmarks, hyperlinks, and form fields from each source PDF are preserved in the merged output.
- What is the difference between Document mode and Page mode?
- Document mode merges entire files in the order you arrange them — quick and simple. Page mode shows every individual page from all files, letting you pick, reorder, rotate, and duplicate specific pages for a custom merge.