PDF merger

Combining PDFs is one of the most common document chores: joining scanned pages, attaching an annex to a contract, putting invoices together for an expense claim or assembling an application. This merger combines several PDF files into a single document directly in your browser, so private documents never leave your computer.

How to use it

1. Select or drop the PDF files you want to combine.
2. Arrange them in the order they should appear.
3. Merge and download the combined PDF.

What is preserved

Pages are copied as they are, so text, images, vector graphics and fonts look exactly the same in the merged file. Text remains selectable and searchable if it was in the original.

What may not carry over

• Digital signatures become invalid, because the document has changed. Merge first, then sign.
• Interactive form fields with the same names in different files can conflict.
• Bookmarks and outlines from individual files may not be combined.
• Password-protected PDFs must be unlocked before merging.

Tips

• Name files with a numeric prefix, like 01-cover.pdf and 02-report.pdf, to make ordering easier.
• If the merged file is large because of scanned images, compress it afterwards.
• Use the PDF splitter to extract only the pages you need before merging.
• Check page orientation; rotated scans stay rotated after merging.

Privacy

Many online PDF services upload your files to their servers. This tool processes everything locally with JavaScript, which is safer for contracts, IDs, bank statements and medical records.