Free tool
Merge PDF files online
Use this free tool to merge PDF files into a single document. Drag in two or more PDFs, drag them into the order you want, then combine and download one clean file. Everything runs in your browser, so your documents are never uploaded to a server.
Merge PDF
Combine multiple PDFs into a single file. Drag to set the order, then merge and download — all in your browser.
Drop PDF files here, or click to browse
Add two or more PDFs, then drag the order below
Your PDFs are combined entirely inside this browser tab using pdf-lib. Nothing is uploaded to a server, so even confidential contracts and scans stay private.
How to merge PDF files
- Add your PDFs. Drag and drop them onto the box above, or click to browse. You can add two files or a dozen.
- Set the order. Use the up and down arrows to arrange the files exactly how you want them in the final document.
- Merge. Click Merge PDFs and the tool stitches every page together in order.
- Download. Save the combined
merged.pdfto your device. That's it — no account, no watermark, no email required.
Why merge PDFs in your browser?
Most “merge PDF” websites upload your files to their servers to do the work. That's a problem when the documents are contracts, invoices, medical records, IDs, or anything else you'd rather not hand to a third party. This tool is different: it combines everything locally on your device using the open-source pdf-lib library, so your files never leave the browser tab.
- Private by design — nothing is uploaded, stored, or logged.
- No limits — merge as many files and pages as your device can handle, with no daily cap.
- No watermark — the output is a clean PDF, exactly like the originals.
- Works offline — once the page has loaded, you can disconnect and it still works.
When merging PDFs is useful
- Applications & paperwork — combine a cover letter, CV, and portfolio into one file to upload.
- Invoices & receipts — bundle a month of receipts into a single document for accounting.
- Contracts — join signed pages and appendices into one final agreement.
- Scans — merge pages scanned one at a time into a complete document.
- Reports & decks — assemble sections from different people into one deliverable.
Tips for clean merged PDFs
- Rename your files with a number prefix (01, 02, 03…) before adding them so the default order is already close.
- Check the page count shown under each file to confirm nothing is missing before you merge.
- If a file fails to load, it may be password-protected — remove the password in your PDF reader first, then try again.
- To reduce the final size, compress image-heavy PDFs before merging, or export scans at a sensible resolution.
Frequently asked questions
- Is this PDF merger really free?
- Yes. You can merge unlimited PDF files with no account, no watermark, and no email. Everything happens in your browser at no cost.
- Are my PDF files uploaded to a server?
- No. The files are combined locally in your browser using pdf-lib and are never uploaded, stored, or logged, so even confidential documents stay private.
- Can I change the order of the files before merging?
- Yes. Each file has up and down arrows so you can arrange them in exactly the order you want in the final PDF before you merge.
- Is there a limit on file size or number of PDFs?
- There is no fixed limit. Because the work happens on your device, the only constraint is your computer's memory. Very large scanned files use more memory than text PDFs.
- Why won't one of my PDFs load?
- The most common reason is that the PDF is password-protected or encrypted. Open it in a PDF reader, remove the protection, save a copy, and add that copy instead.
- Does merging reduce quality?
- No. Merging copies the original pages as-is into a new document, so text stays selectable and images keep their original resolution.