FREE ONLINE TOOL

Merge PDF Files

Combine PDF documents into one file.

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REAL-WORLD EXAMPLE

Combine two PDFs in order

Try: Select two PDFs, move the files into the preferred order and choose Merge and download.

Expected behavior: Download one PDF containing the selected pages in sequence.

Encrypted PDF documents may not be supported.

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About the Merge PDF Files

Combine multiple PDF documents into one downloadable file in a chosen page order.

Formula or method

The local PDF engine imports each selected PDF, copies its pages into a new document and saves the result.

Worked example

Select three PDF reports, move them into the correct order and merge into a single PDF file.

How to use the tool

  1. Choose at least two PDF files; watch for the per-file and combined size limits.
  2. Use the Up and Down controls to reorder the files before combining them.
  3. Choose Merge and download, open the resulting PDF and confirm every page appears in the correct order.

When this tool is useful

Combine separate PDF documents into one file in a deliberate page order.

What to check before relying on the result

Encrypted or corrupted source files may fail. Merging does not perform OCR or rewrite existing PDF text.

Assumptions and limitations

Encrypted PDFs and some annotations, bookmarks or forms may not be preserved. Verify the final document before sharing.

Frequently asked questions

Are my PDF documents uploaded?

No. The merge process runs in the browser using an on-device PDF library.

Does merging PDFs change the order of pages?

Each document's internal page order stays intact; the final document follows the order of files shown above the merge button.

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Privacy and support

Your inputs are processed locally in your browser. ToolMosaic does not upload or store the values you enter in this tool. Our tools are free, and we appreciate your support.