PDF Tools

PDF Merger

Combine two or more PDFs into one document locally. Check page counts, reorder the files and download a merged PDF without a paid API or server upload.

PDF MergerOn-device processing

Preparing your tool…

How to use it

  1. 01Choose two to ten unencrypted PDFs, up to 20 MB each and 40 MB total.
  2. 02Use the up/down controls to set document order.
  3. 03Merge the PDFs, check the output page count and download the new document.

Useful details

Pages are copied in document order with pdf-lib running in a background worker. The output is limited to 500 pages. Original files remain unchanged. Interactive forms, bookmarks and digital signatures may not carry over to the new PDF. Password-protected documents are rejected. Review the downloaded pages before using the result. This operation combines files; it does not promise smaller file sizes.

Questions about this tool

Are my PDFs uploaded?

No. The merger processes them in a worker on your device. The processing library is downloaded only for PDF tools.

Can I change file order?

Yes. After choosing files, use the up/down controls beside each document. Pages inside each source document remain in their original order.

Will forms and digital signatures remain valid?

This tool copies page content and does not guarantee interactive forms or bookmarks. Creating a new PDF does not preserve digital-signature validity. Review the output.

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