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Documents & PDF

Merge PDF Document Processor

Merge PDF files online in your selected order. Preview the combined pages, check document boundaries, and download the merged PDF.

Tool workspace

Your input stays in this browser.

Add the required input to continue.

Needs input

Run the tool when your input is ready.

Drop files here or choose files. Each selection adds files to the list.

Maximum 100 MB per file and 500 pages combined. Password-protected PDFs are unsupported.

File order

Set the order used for the final file.

Add files above to set their order.

File count: minimum 2.

Your result appears here

Merge PDF files online in your selected order. Preview the combined pages, check document boundaries, and download the merged PDF.

This tool runs open-source code from OmniTools (MIT License). See open-source credits.

Merge PDF Document Processor combines selected PDF documents in their chosen order. A one-page document followed by a two-page document produces a three-page PDF, with the first document's page first.

The result is one downloadable PDF containing the selected documents' pages in the chosen file order.

  • Combine separate report sections into one document.
  • Put several receipts into a single PDF for a submission.
  • Join a cover sheet with an existing document.

Instructions

  1. Choose the PDF files you want to combine.
  2. Arrange the files in the required order, then select Merge PDFs.
  3. Inspect the merged page order and download the result. Keep the source documents until you finish checking.

Example

Input: first.pdf with 1 Letter page, then second.pdf with 2 A4 pages

Settings: PDF files in the order first.pdf, second.pdf

Result: merged.pdf with 3 pages: the Letter page first, then the 2 A4 pages

The order of the PDF files list sets the page order in merged.pdf.

Limits

  • Merging does not edit the text or provide optical character recognition for scanned pages.
  • Encrypted, damaged, or unusually large files may fail. Browser memory affects the size you can process.
  • Do not rely on merging to preserve digital signatures or every interactive document feature. Check the result before official use.

Questions

How do I merge PDF files into one document?

Select at least two PDF files and arrange them in the required order. Run the merge and inspect the page order in the result.

Does PDF merging rewrite the document’s text?

The operation combines pages into one output document. It does not provide paragraph editing or text correction.

What should I check after merging PDFs?

Check the first and last page of each source section and the final page count. These checks help detect an incorrect file order or a missing source file.

How do I combine PDF files in the correct order?

Choose the PDF files and arrange them in the required order before merging. Inspect the merged preview, especially the boundary between documents. Download the result and check its page count. Merging files combines pages; it does not rewrite the text on those pages.