Combining multiple PDFs into a single document is one of the most common things people need to do with PDFs — whether you’re assembling a report from separate sections, combining scanned pages, or merging contracts with attachments.
Here’s how to do it quickly and correctly.
The Quickest Way: Online PDF Merger
No software installation needed. Our Merge PDF tool handles it in a few clicks:
- Go to pdftoolshq.com/merge-pdf
- Upload your PDF files (up to 100MB total)
- Drag to reorder them if needed
- Click Process — your merged PDF downloads instantly
The files are combined in the order you upload them, so if order matters, either rename files so they sort correctly (01-intro.pdf, 02-body.pdf) or use the drag-to-reorder feature.
Common Use Cases
Combining scanned pages — if you scanned a multi-page document one page at a time, merge all the individual page PDFs into one file.
Assembling a report — merge a cover page, main content, and appendices into a single submission-ready document.
Contracts with attachments — combine the main agreement with exhibits, schedules, or supporting documents so everything stays together.
Merging bank statements — if you need to provide several months of statements as one file, merge them in chronological order.
Getting the Page Order Right
Page order is the most common mistake when merging PDFs. A few tips:
- Number your files before uploading (01_, 02_, 03_) so they sort alphabetically in the correct order
- If you need to rearrange pages after merging, use the Organize PDF tool to reorder individual pages
- If you merged in the wrong order, you don’t need to start over — just run the merged file through Organize PDF
Merging Large Files
The tool supports files up to 100MB. If your combined PDFs exceed that:
- Compress each PDF individually using the Compress PDF tool before merging
- Or merge in batches — combine the first half, combine the second half, then merge the two resulting files
After Merging
Once merged, you might want to:
- Add page numbers — use the Add Page Numbers tool to number the combined document from page 1
- Password protect it — if the merged document contains sensitive content, add a password before sharing
- Compress it — merged files are sometimes larger than expected; run through Compress PDF to reduce the final size