📄 PDF Merger
Combine multiple PDF files into one document with drag-to-reorder, per-file page range selection, and client-side processing. Your files never leave your browser.
Drop PDF files here
Supports multiple files · Drag to reorder after upload
1-3, 1,3,5, 2-4,7
About This PDF Merger
A PDF merger is a browser-based tool that combines multiple PDF documents into a single file — used by professionals, students, and teams to consolidate contracts, reports, invoices, or research into one deliverable. This tool processes everything client-side using the pdf-lib library, with no file uploads required.
PDF Merger is a free browser-based tool that joins multiple PDF files into one combined document without installing any software or creating an account. The merger runs entirely in your browser using the pdf-lib JavaScript library, which handles page extraction, document assembly, and binary output locally on your device.
What sets this PDF merger apart from typical online tools is the per-file page range selector. Instead of merging every page from every file, you can specify exactly which pages to include from each document using ranges like 1-3,5,7. Combined with drag-to-reorder, you have full control over the final document structure before a single byte is processed.
The PDF format accounts for over 2.5 trillion files in existence globally, making it the dominant standard for document exchange in business, legal, and academic contexts. A reliable PDF merger is one of the most frequently needed document tools in any professional workflow.
What Makes This PDF Merger Different
- Per-file page range selection — include only the pages you need from each source document
- Drag-to-reorder with visual grip handles — set the final page order before merging
- Live page count display — see how many pages each PDF contributes before the merge
- Client-side processing via pdf-lib — no server receives your documents at any point
- No file count restriction — add as many PDFs as your device memory can handle
How to Use This PDF Merger
How PDF Merging Works Step by Step
- Upload your PDF files by clicking the upload zone or dragging files directly into it — multiple files can be added at once.
- Drag the grip handle on each row to reorder files and set the sequence they appear in the final merged PDF.
- Type a page range in the range box next to any file to include only specific pages — leave empty to include all pages from that file.
- Click Merge PDFs, then download the combined document from the result panel once processing completes.
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The pdf-lib library reads each source PDF, extracts the requested pages using zero-indexed page references, and assembles them sequentially into a new PDF document. The output is a standard, fully compatible PDF file that opens in any PDF reader on any operating system. Page ranges are parsed in the order you specify — entering 3,1,2 will include pages 3, then 1, then 2 in that sequence, giving you precise control over chapter ordering when combining documents.
Who Is This PDF Merger For
PDF merger tools are among the most universally needed document utilities across industries. Legal professionals use them to consolidate contracts, addenda, and signature pages into a single submission. Accountants merge monthly invoices, bank statements, and receipts for audit preparation or expense reporting. Students compile research papers, citations, and appendices into a single document for submission portals with single-file upload restrictions.
HR teams assemble multi-page onboarding packets from separate policy documents and forms. Freelancers combine portfolio samples, proposals, and rate cards into a single client-facing PDF. Developers packaging PDF reports from multiple microservices can concatenate outputs without a backend dependency. Anyone working with documents regularly will use a PDF merger multiple times per month.
The page range feature is particularly valuable for legal review workflows where only specific sections of lengthy contracts are relevant to a given party, or for academic compilations where only selected chapters from multiple books are combined for a study pack.