Can I merge password-protected PDFs?

You need to unlock them first. Use the Unlock PDF tool to remove the password, then merge the unlocked files.

Is there a limit on how many PDFs I can merge?

No fixed limit. The tool handles dozens of files comfortably. Merging many large files may take longer since all processing happens in your browser.

Will bookmarks and links be preserved?

Page content, fonts, and images are preserved exactly. Internal bookmarks and cross-document links may not transfer between merged files.

Can I reorder the files before merging?

Yes. Use the up/down arrows next to each file to arrange them in your preferred order. The final PDF follows this order.

Will merging change the formatting of my PDFs?

No. Each PDF retains its original page sizes, fonts, and layout. Merging simply concatenates them into one file.

Can I reorder pages after merging?

You can drag files into your preferred order before merging. For page-level reordering, use the Organize PDF tool after merging.

Does the merged PDF keep bookmarks and links?

Internal links within each original PDF are preserved. Cross-document bookmarks may need to be recreated in a PDF editor.

Can I merge PDFs with different page sizes?

Yes. Each page keeps its original dimensions. The resulting PDF may have mixed page sizes, which is normal.

Merge PDF

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Max 500.0 MB per file·Supports: PDF

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How PDF merging works

FileKit reads each PDF, copies its pages while preserving fonts, images, and layout, and writes them out into a single new document. The order in the file list determines the final page order — drag the up/down arrows to rearrange. All work runs in your browser, so even confidential files stay on your device.

How to Merge PDF Files

1
Upload multiple PDFs
Drag and drop two or more PDF files into the upload area, or click to select them from your device. All files remain on your computer.
2
Arrange the order
Drag the file cards to reorder them. The final merged PDF will follow this sequence from top to bottom.
3
Merge and download
Click the merge button. FileKit combines all pages into a single PDF file. Download the result — your originals stay untouched.

Merge PDF

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How PDF merging works

How to Merge PDF Files

Upload multiple PDFs

Arrange the order

Merge and download

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