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Merge PDF files into one

Select two or more PDFs, arrange them in order and combine them into a single document.

Drop PDF files here

Two or more PDFs · up to 100 MB each

PDFs are read and written in your browser with the open-source pdf-lib library. Files are not uploaded to ToolsNest servers and are released from memory when you clear the tool or leave the page.

How to use the PDF Merger

  1. 1Add two or more PDF files.
  2. 2Use the arrows to set the order.
  3. 3Select Merge PDFs.
  4. 4Download the combined file.

Supported formats and limits

  • Up to 30 files, 100 MB each.
  • Pages are copied without re-compression.
  • Password-protected or encrypted PDFs are not supported and are reported with a clear message.
  • Bookmarks and form fields may not carry over.

Common uses

  • Combining a CV, cover letter and certificates into one application file.
  • Joining monthly statements into one record.
  • Assembling chapters into a single report.

Frequently asked questions

Is there a page limit?

There is no fixed page limit, but very large files depend on your device's memory.

Why was my file rejected?

It is likely encrypted, password-protected or damaged. Remove the password in the original app first.

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Related guides

Guide · 4 min read

How to Merge PDF Files

Combine several PDFs into one document in the right order, and what to do when a file will not merge.

Guide · 4 min read

How to Convert Images to PDF

Combine photos and scans into a single, well-laid-out PDF with the right page size and margins.