PDF | Organize

Merge PDF files online

Merge contracts, reports, and receipts into a single PDF without uploading. Everything runs in your browser.

Merge PDF combines two or more PDFs into a single document, preserving page order, bookmarks, and formatting. DocTools performs the merge in your browser so nothing uploads. Merge PDF is a free browser tool that lets you combine multiple PDFs into one document.

Free to use
No signup
No uploads
Works offline

Why use Merge PDF

Reorder pages by drag and drop
Preserves bookmarks and page numbers
Merge dozens of files in one pass
Files never leave your device

Merging runs client-side in your browser. No PDF, page, or byte is transmitted.

How to use Merge PDF

Add your PDFs Drop the PDFs you want to combine into the drop zone.
Reorder if needed Drag tiles to set the final page order.
Download the merged PDF Save the combined document.

Benefits

One attachment instead of many

Send a single, indexed PDF instead of a folder of stray files.

Order you control

Preview and rearrange every input before you export.

No third-party servers

The merge runs in WebAssembly on your device. Nothing is uploaded.

Who it is for

Finance

Assembling monthly invoices into a single audit packet Outcome: Ship one PDF instead of ten.

HR

Combining offer letter, benefits guide, and NDA for a new hire Outcome: Send one file to countersign.

Researchers

Merging chapter drafts into a single reviewable document Outcome: Give reviewers a linear read.

How it works

Merge PDF loads your PDF into memory, applies the change you requested to the underlying data rather than to a screenshot of it, and writes a fresh copy for download. Your original stays untouched on disk, and every step of Merge PDF happens inside your browser sandbox.

Frequently asked questions

How many PDFs can I merge at once?

You can merge dozens of PDFs; the limit depends on your device's memory.

Can I reorder pages before merging?

Yes. Drag and drop the file tiles to change order before you export.

Are bookmarks preserved?

Yes. Existing outlines are carried into the merged document where possible.

Can I merge encrypted PDFs?

Unlock them first with the Unlock PDF tool. Encrypted content streams cannot be re-serialized during merge.

Related tools

Excel Sheet Merger | Merge multiple Excel files into one workbook
Split PDF | Separate a PDF into individual pages
Remove Pages | Delete unwanted pages from your PDF

Last updated: 2026-07-09