Merge PDF Files Online Free — Combine PDFs Privately

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Merge PDF Files

Combine PDFs in your browser

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Drop PDF files here or click to choose

Up to 25 MB per file · files are processed locally, never uploaded

How to Merge PDF Files

Add your PDFs — drag & drop or click to pick two or more files.
Arrange the order with the ▲ ▼ buttons; remove any file with ✕.
Click Merge PDFs — your combined merged.pdf downloads instantly.

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100% private

Merging happens entirely in your browser — contracts, statements and tax forms never leave your device.

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Reorder freely

Put files in exactly the order you want before merging — cover letter first, exhibits last.

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No sign-up, no limits

No account, no watermark, no email gate. Merge as many times as you need, free.

About the Free PDF Merger

Need to combine PDF files into a single document? Whether you're assembling a mortgage application, joining scanned receipts for an expense report, putting together a legal exhibit packet, or merging chapters of a report, this free PDF merger joins any number of PDFs into one clean file — in exactly the order you choose.

Unlike most "free" PDF tools that upload your documents to a server, this merger runs 100% in your browser using the open-source pdf-lib engine. Your files are read locally on your own computer or phone, combined locally, and downloaded locally. Nothing is transmitted, stored, or seen by anyone — which matters when you're merging bank statements, medical records, W-2s, or signed contracts in 2026's privacy-conscious world.

Just drop in your PDFs, use the arrow buttons to set the order, and click Merge. The tool shows each file's size and page count, warns you about password-protected PDFs it can't open, and produces a standard merged.pdf that opens in Adobe Acrobat, Preview, Chrome, and every other PDF reader. It works on Windows, Mac, iPhone, Android, and Chromebook — no software to install.

Tip: if you also need to go the other way, try our PDF to Word converter, or shrink photos before they go into a document with the Image Resizer.

Merge PDF FAQ

Is it safe to merge PDFs with this tool? ▾

Yes. The merge runs 100% in your browser using the open-source pdf-lib engine — your files are never uploaded, stored, or seen by a server, so bank statements and contracts stay private.

Is this PDF merger really free? ▾

Completely free. There is no sign-up, no watermark, no trial limit, and no hidden paywall — merge as many PDFs as you like.

How do I change the order of the PDFs before merging? ▾

Use the up and down arrow buttons next to each file in the list to arrange them, and the X button to remove a file. The merged PDF follows the order shown top to bottom.

Is there a file size or file count limit? ▾

Each PDF can be up to 25 MB, and you can add as many files as you need. Very large merges depend on your device memory since everything runs locally.

Can I merge password-protected PDFs? ▾

No. Encrypted or password-protected PDFs cannot be opened by the in-browser engine; the tool will skip them and tell you which files were affected. Remove the password first, then merge.

Does merging reduce the quality of my PDFs? ▾

No. Pages are copied losslessly into the new document — text, images, and vector graphics keep their original quality.

Does it work on iPhone, Android, and Mac? ▾

Yes. It works in any modern browser on Windows, Mac, Chromebook, iPhone, and Android — no app or software install needed.