Merge PDF Files Free Online

Combine PDF files into one document for free. Add your PDFs, arrange their order, and download the merged file. Document processing happens in your browser.

In-Browser(Zero Server Uploads)

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Related guides

How to Merge PDFs in the Right Order

Combine PDFs in the order you need

Place your cover sheet first, followed by the main document and supporting files. Use the arrow buttons beside each file to change its position before merging.

The merger combines complete documents. To include only part of a PDF, prepare those pages with Split PDF before adding the result here. Review the downloaded file before submitting or sharing it.

Working with large documents

Processing uses your device memory. If a large batch cannot finish, try fewer files at a time. Keep the original PDFs until you have checked the combined document.

How It Works

The tool reads the selected PDFs in your browser and copies their pages into a new document using pdf-lib. It appends documents in the order shown in the file list, then creates a local download for the combined PDF.

🔒 Your files and entered content are processed on this device and are not uploaded by this tool. Pexlii also loads Google Analytics for usage measurement; tool events include the tool name, category, and action type, not your files or entered content.

How to Use Merge PDF Files

Select or drop two or more PDF files into the tool.

Use the up and down buttons to arrange documents in the order you want.

Click the merge button to combine all pages from the selected documents.

Download the merged PDF and review its page order.

Supported Formats

PDF (.pdf)

Key Capabilities

Combine multiple PDF documents in your browser

Reorder documents with up and down buttons

Remove a document before merging

Download the combined PDF without added watermarks

Application Scenarios

Combining invoices and receipts into one expense report

Merging PDF chapters into a portfolio

Adding a cover sheet before supporting documents

Technical Constraints

•Encrypted or password-protected PDFs must be unlocked before merging.

•Extremely large batches exceeding available browser RAM may experience performance slowdowns.

Frequently Asked Questions about Merge PDF Files

How do I merge PDF files free online?

Select two or more PDFs, use the up and down buttons to arrange them, and click the merge button. Download the combined file once processing finishes.

Does this PDF merger add a watermark?

Can I reorder individual pages before merging?

Are my PDF files uploaded for processing?