Merge PDF files into one — free

Drop two or more PDFs onto the tool, drag the rows to set the merge order, and click Merge & Download. Pages from each source PDF are copied into a single output document in your chosen order. Your files are uploaded over HTTPS and merged on our secure server, then automatically deleted afterward.

You can reorder entire files (drag the row up or down), and you can remove a file from the merge with the trash icon. To reorder individual pages within a PDF, run it through our Organize PDF tool first, then merge.

Page content (text, images, fonts, hyperlinks within a page) is preserved exactly because whole pages are copied atomically rather than re-rendered. Document-level bookmarks and the table-of-contents are reset since the new file is a fresh document — re-add bookmarks with a desktop PDF editor if needed.

Each file can be up to 20MB on the Free plan, 50MB with Premium or 120MB with Pro, and you can merge up to 20 PDFs at once. In practice, merging a handful of large books (500+ pages each) or hundreds of small reports works comfortably within that limit.

Yes — your PDFs are uploaded over an encrypted (HTTPS) connection, merged on our secure server, and automatically deleted afterward; we never store or share them. If your policy strictly forbids any upload at all (e.g. some compliance workflows for contracts, NDAs or medical records), use a desktop PDF tool that runs fully offline instead.

If you know the password, decrypt first with our PDF Password tool, then merge. The merge tool can usually handle PDFs with light protection, but PDFs with strict encryption (printing/copying disabled) need to be unlocked first.

Slightly smaller because duplicate fonts and embedded resources are deduplicated during the merge. The difference is typically a few percent — significant only when you are merging many files that share the same font set (e.g. an entire branded report series).

Preview the merged PDF before signup, then create a free account for the standard download. Signed-in free allowances and file limits apply; Premium adds larger files and batch capabilities.

Yes — each page keeps its own dimensions in the combined file because pages are copied as-is rather than reflowed. An A4 contract, a Letter-size invoice and a landscape spreadsheet can all sit in one PDF, each at its original size. Drag the rows to control which document comes first.

Yes, but with a different tool: Split PDF extracts a page range (e.g. 5-12) into its own file, and Organize PDF lets you delete or reorder pages in the merged result. Merge only joins files together, so reach for those sibling tools when you need to take a combined PDF apart again.

Yes — click "Add more" at any time before merging; new files are appended to the end of the list with their own thumbnail rendered automatically. Drag them, or use the up/down arrow buttons, into position relative to the files already there — you don't need to restart the order from scratch.

Yes — every file row has small up/down arrow buttons next to the drag handle that move it one position at a time, which is far more reliable than a drag gesture on a touchscreen. Tap them repeatedly to walk a file to the top or bottom of the merge order.

Yes — no desktop software is needed. Drop your PDFs into the browser, reorder them and preview the merge before signup. Create a free account to download the standard combined file without a watermark. Temporary files are processed over HTTPS and deleted automatically.