Is there a limit on how many PDFs I can merge?

No strict limit exists. Processing speed depends only on your local computer memory and browser capabilities.

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PDF Merger

Combine multiple PDF documents into a single organized file.

PDF Merger

Combine multiple PDFs into one — entirely in your browser.

Drop PDFs here or click to browse

Supports multiple files at once

Key Features

Combine multiple PDF documents into a single unified file

Reorder PDF files with simple drag-and-drop or move buttons

Fast client-side PDF concatenation using pdf-lib

Zero page limits and no file size upload bottlenecks

Download your merged document in seconds

How to Use the PDF Merger

Upload two or more PDF files from your computer.

Arrange the documents into your preferred sequential order.

Click "Merge PDFs" to generate and download your combined document.

Examples

Merging Multiple Reports

Concatenates individual documents into a single continuous PDF.

Input / Scenario:

Cover_Page.pdf (1 page) + Annual_Report.pdf (12 pages)

Output:

Combined_Report.pdf (13 pages)

Client-Side PDF Manipulation

PDF (Portable Document Format) structures data in standardized object trees. By parsing and re-assembling these object streams client-side in WebAssembly/JavaScript, Tool Vault merges documents directly in browser memory without sending private legal or business files over the web.