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PDF Merger

Combine multiple PDF files into one document in your browser.

Runs locally in your browser. Your input is not uploaded or stored. You can verify this in your browser’s network panel.

Processing limits

  • Accepted formats: PDF
  • Maximum file size: 25 MB
  • Maximum pages: 100
  • Maximum files: 10

What does this tool solve?

Choose two or more PDF files, arrange their order, and create one combined PDF for download. Files are read and merged in your browser. Read PDF pages and metadata before relying on signatures or producer-specific metadata, or use PDF Splitter when the task is page extraction rather than merging.

Continue with PDF Splitter · Merge PDFs locally and verify the result

What examples should you start with?

Combine a report

Input
Text
cover.pdf + report.pdf + appendix.pdf
Output
Text
lessinai-merged.pdf · pages remain in the selected order

Reorder source files

Input
Text
chapter-2.pdf, chapter-1.pdf
Output
Text
Move chapter-1 above chapter-2 before merging.

How does it work?

Each selected PDF is loaded into memory, its pages are copied to a new PDF document in the order shown, and the new bytes are offered as a local download.

The input files are not sent to a server. A new document is generated instead of changing the originals.

What are the edge cases and limits?

  • PDF files must be readable and not protected by unsupported encryption.
  • The default limit is 10 files, 25 MB per file, and 100 pages in total.
  • Large or complex PDFs can use substantial browser memory. Close unused tabs if a low-memory device struggles.

Technical reference

Related tools

  • PDF SplitterExtract selected pages or page ranges into a new PDF locally.

Related guides