How to Merge PDF Files Into One (Free, Private)
Combine multiple PDFs into a single file in the right order, free with page-count previews. Nothing is uploaded.
Updated 2026-09-14 • Free • No upload • No sign-up
Merging PDFs is one of the most-searched file tasks: contracts, invoices, textbook chapters and scanned forms all arrive as separate files that should be one document.
Most free mergers upload your documents to a server first — a real problem for contracts and IDs. Our merge tool joins files locally and shows each file’s page count plus a first-page thumbnail, so you can verify the order before downloading.
Steps
- Add two or more PDFs. Each file shows its page count, file size and a thumbnail of its first page.
- Arrange the merge order. Use the arrow buttons to move files up or down. The on-screen order is exactly the order pages appear in the result.
- Merge and download. One click combines everything into a clean PDF with no watermarks or added pages.
Tips
- Total page count is shown live — handy for checking nothing is missing before you merge.
- Remove a file with the ✕ button instead of re-adding everything.
- Merging preserves the original pages as-is: text stays selectable and sharp.
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Guide FAQ
Is there a limit on file size or count?
No server limits apply since nothing is uploaded. Very large files are bounded only by your device memory.
Are my documents uploaded?
Never. Joining happens with pdf-lib entirely inside your browser tab.
Can I merge images together with PDFs?
Convert the images to a PDF first with the images-to-PDF tool, then merge that file with the rest.