How to merge PDF files
- Add your files. Choose the PDF documents you want to combine, or drag them onto the area above. There is no limit on how many you can add.
- Arrange the order. Drag the files to reorder them. The final document follows the sequence shown, from first to last.
- Merge and download. Select Merge PDF and save your combined document.
Frequently asked questions
How many files can I combine at once?
There is no fixed limit. For very large batches, merging in a few smaller groups keeps the tool responsive.
Will merging reduce the quality?
No. Each page is copied exactly as it is, so text and images keep their original quality.
Can I merge password-protected PDFs?
Not directly. Remove the password first with Unlock PDF, then combine the files.
Is this tool free?
Yes - it is completely free, with no account, no limits, and no watermarks added to your files. Every PDF tool on File-Extension works the same way.
All PDF tools
A complete, free PDF toolkit - pick another tool to keep working.
Merge PDFCombine several PDFs into one - drag to set the order.
Split PDFSplit by ranges, every N pages, or one file per page.
Compress PDFShrink file size with a quality you choose.
Rotate PDFTurn pages 90°, 180° or 270° - all or selected.
Organize PDFReorder, delete and rotate pages on one screen.
Extract PDF pagesPull selected pages into a new PDF.
Remove PDF pagesDelete unwanted pages from a PDF.
Watermark PDFStamp text or an image over every page.
PDF page numbersAdd page numbers, your format and position.
Sign PDFType, draw or upload a signature - place it anywhere.
Fill PDF formsFill in interactive form fields, then flatten.
Protect PDFSet a password and permissions (AES-256).
Unlock PDFRemove a password you already know.
Repair PDFRebuild a damaged PDF structure.
OCR PDFMake a scanned PDF searchable.