Combine multiple PDF files into a single document, in whatever order you choose — all processed locally in your browser.
About the PDF Merger
Combining several PDFs into one file is one of the most common document tasks — merging chapters of a report, combining scanned pages, or putting together a full application packet from separate documents. This tool merges any number of PDF files into a single document, letting you control the exact order pages appear in, without uploading anything to a server.
Key Features
- Merge any number of PDFs. Add as many files as you need, in one batch or across multiple uploads.
- Reorder before merging. Drag files into the order you want them to appear in the final document.
- Preserves original quality. Unlike image-based approaches, this tool merges the actual PDF pages — text stays selectable and images stay at full quality.
- No file size limits imposed by us. Processing happens on your device, so the only constraint is your own browser's available memory.
- Completely private. Files are never uploaded to a server — the merge happens entirely client-side.
How to Use the PDF Merger
- Click the upload box, or drag and drop two or more PDF files onto it.
- Reorder the file list by dragging items if you need pages in a specific sequence.
- Click Merge PDFs — your browser combines them into one file and starts the download.
How It Works
This tool uses pdf-lib, an open-source library for creating and modifying PDF documents directly in JavaScript. Rather than rendering pages as images, pdf-lib copies each PDF's actual page objects into a new document — preserving selectable text, embedded fonts, and image quality exactly as they were in the source files. The finished, merged PDF is then handed to your browser as a download.
Common Use Cases
- Combining reports or chapters. Merge separately created sections into one final document.
- Application packets. Combine a resume, cover letter, and certificates into a single PDF for submission.
- Scanned documents. Merge multiple scanned pages saved as separate PDFs into one file.
- Invoices and records. Combine multiple related documents for easier filing or sharing.
Frequently Asked Questions
Will text and formatting be preserved? Yes — because this tool merges actual PDF page content rather than converting pages to images, text stays selectable and formatting is unchanged.
Can I merge password-protected PDFs? No — encrypted or password-protected PDFs can't be read by this tool. Remove the password using your PDF viewer first, then merge.
Is there a limit on how many files I can merge? There's no fixed limit — you're only bound by your device's available memory when working with very large or numerous files.
Can I split a merged PDF back apart later? Yes — use our PDF Splitter to break a document back into individual pages or ranges.