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Merge PDF

Combine multiple PDF files into one single document in any order you choose.

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Step-by-Step Guide

How to use Merge PDF

1

Add your PDF files

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Click "Choose PDF files" or drag and drop two or more PDFs into the upload area.

2

Arrange the order

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Drag files in the queue to reorder them. The output document will follow the order shown.

3

Set the output name

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Edit the output filename field to give your merged document a meaningful name.

4

Merge the files

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Click "Merge PDFs". Processing runs entirely in your browser — no upload required.

5

Download the result

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When complete, click Download to save the merged PDF to your device.

Best Practices

Pro Tips

Tip 1

Check page orientation before merging — portrait and landscape pages can be mixed but may look inconsistent in some viewers.

Tip 2

Use the Organize Pages tool after merging if you need to remove or reorder individual pages.

Tip 3

For very large documents (>100 MB), consider compressing each file first to speed up the merge operation.

Tip 4

Encrypted PDFs must be unlocked using the Remove Password tool before they can be merged.

Common Questions

Frequently Asked Questions

There is no hard limit. You can add as many files as your browser's available memory allows. For very large batches, merging in groups of 10–20 files can be more reliable.

Yes — use the Organize Pages tool for page-level control. Merge PDF works at the file level; Organize Pages works at the individual page level.

File-level bookmarks are not merged automatically in this release. Text hyperlinks and internal links within individual pages are preserved.

PDFs must be unlocked before merging. Use the Remove Password tool first, then merge.

No. PDFolio copies pages directly without re-rendering or re-encoding, so there is no quality loss.

Interactive form fields from each PDF are included in the output. If two PDFs have fields with the same name, they may conflict — use the Flatten PDF tool to flatten forms before merging if this causes issues.