Merge PDFs

PDFProcessed Locally — 100% Private

Combine multiple PDFs into one.

Merge PDFsCombine multiple PDF documents into one

Drop PDF files here to merge

Select 2 or more files. You can reorder them before merging.

How to Use Merge PDFs Online

Merge multiple PDF documents into a single organized file in seconds. All PDF stitching and page assembly run locally inside your browser memory using WebAssembly, ensuring complete confidentiality with zero file uploads.

Step 01

Input & Prepare

Select or drag-and-drop two or more PDF files from your computer or device.

Step 02

Configure & Adjust

Drag to reorder the files or pages to set your exact target page sequence.

Step 03

Export or Copy

Click 'Merge PDFs' to combine the documents and download your unified file immediately.

Common Use Cases

Combine separate scanned pages into a single cohesive document
Bundle client contracts, invoices, and appendices into a complete package
Merge tax receipts, bank statements, and financial records for accounting
Assemble multi-part academic papers, reports, and course submissions

Technical Specifications & Limitations

Encrypted, password-protected, or corrupted PDFs must be unlocked or repaired before merging.

Frequently Asked Questions

Are my PDF files uploaded to any server?

No. All PDF merging happens 100% client-side inside your browser memory using pdf-lib. Your files never leave your computer.

Does merging reduce PDF quality or compress images?

No, PDF pages are copied directly into the new document structure without rasterizing text or recompressing embedded graphics.

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

You can merge as many files as your device memory supports. For typical devices, combining dozens of files totaling hundreds of megabytes works smoothly.

Can I rearrange the order of individual pages before merging?

Yes, you can rearrange file order in this tool, or use the Reorder PDF Pages tool for fine-grained per-page organization.

100% Client-Side Privacy Guarantee

DailyToolbox processes all operations using local WebAssembly and Web APIs inside your browser memory. No data, files, or sensitive inputs are ever uploaded to an external server or saved in tracking cookies.