Merge PDF Online — Combine Multiple PDF Files
Merge multiple PDF files into one document with a self-hosted processor. Combine reports, scans and attachments in the selected file order.
Accepted formats: PDF
Files are sent only to your self-hosted PDF processor and removed from temporary application storage after processing.
About this tool
The PDF merger combines two or more selected PDF files into one downloadable document. Files are processed in the order supplied by your browser, so confirm the selection order before starting when page sequence matters.
How to use
- Choose at least two PDF files in the order you want them combined.
- Start processing and wait for the self-hosted service to merge every page.
- Download the merged PDF and verify the page order, bookmarks and document content.
Features
- Combines all pages from multiple PDFs into one file.
- Uses a self-hosted processor without requiring an account.
- Preserves the source page dimensions and orientation.
Common use cases
- Combine monthly reports or invoices into one archive.
- Join cover pages, forms and supporting attachments.
- Merge separate scans into a single document for submission.
Common issues and tips
- Browser file pickers may order files differently from the order they were clicked; check the resulting PDF.
- Encrypted, damaged or unsupported PDFs may need to be unlocked or repaired before merging.
Privacy
Selected PDFs are sent to the Tools12345 self-hosted processor for merging and are not kept as permanent user storage.
Frequently asked questions
How many PDF files are required?
The merger requires at least two PDF files. Very large batches may be limited by browser, server memory or upload limits.
Can I rearrange individual pages while merging?
This tool combines complete files. Use the Reorder PDF Pages tool when you need to change individual page positions afterward.
Will page sizes be made identical?
No. Pages normally keep their original dimensions and orientation inside the merged document.