PDF Merger

Upload multiple PDFs from your computer and merge them into one file. Perfect for combining documents for printing without limits.

Last updated: May 2026 · By John Bowman - questions? Connect on LinkedIn.

Why Merge PDFs Locally?

Uploading sensitive documents to a web service is risky. This tool processes everything on your device — no files leave your computer. Merge as many PDFs as you need without file size limits or account requirements.

Frequently Asked Questions
Is there a file size limit?
No. Merge as many PDFs as you want and they can be any size. The tool processes files locally on your device, so there's no server-side limit. Processing speed depends on your device's available memory.
Can I reorder the PDFs before merging?
No. The tool merges PDFs in the order you select them. Plan the order before uploading, or download and re-merge if you need a different sequence.
What happens if a PDF is corrupted?
The tool will show an error and stop merging immediately. It will tell you which file caused the problem so you can check it or remove it from your selection.
Can I print the merged PDF directly?
Yes. Once the merge is complete, click the Print button to open your browser's print dialog. Print to paper or save as PDF from there.
Which browsers are supported?
The tool works on all modern browsers: Chrome, Firefox, Safari, and Edge. Older browsers may not support the required PDF processing features.
How It Works
  1. Click to select PDFs. Choose multiple files from your computer. You can also drag and drop them onto the page.
  2. Preview your selection. See the filenames and sizes. Remove any you don't want.
  3. Click Merge PDFs. The tool combines them in the order you selected them.
  4. Download or print. Once done, download the merged PDF or open the print dialog.
Key Points
  • No limits on file size or number of PDFs. Merge as many as your device can handle.
  • All processing happens locally. Your files never leave your computer — no uploads to any server.
  • Merges in upload order. The tool combines PDFs exactly as you select them.
  • No account required. Just open the tool and start merging.
  • Works on any device. Merge on Windows, Mac, Linux, or mobile browsers.
Sources & Further Reading
  1. pdf-lib — JavaScript PDF library used in this tool.
  2. MDN Web Docs — File API.
  3. MDN Web Docs — Blob API.
  4. FAQ Schema Generator — related tool for structured data.