pdf Tool · Free

Merge PDF Files Online Free

Merge PDF files online free. Combine multiple PDFs into one document. Drag to reorder before merging. No upload, instant download, 100% private.

🔒100% Private: Your files are processed entirely in your browser and never uploaded to any server.

Frequently Asked Questions

How many PDFs can I merge?
You can merge up to 20 PDF files at once.
Can I set the order of pages?
Yes! Drag the PDF files into your desired order before clicking Merge.
Is there a file size limit?
Each individual PDF can be up to 100MB.
Will the merged PDF quality change?
No — pages are copied exactly without re-encoding. Quality is preserved.
Is it free?
Yes, completely free with no sign-up required.

About This PDF Merger

Combine multiple PDF files into a single document online for free. Drag to reorder your files, then merge them instantly — no Adobe Acrobat needed, no file uploads, completely private.

How It Works

Upload two or more PDF files. Drag them to set the order you want. Click Merge and the tool uses pdf-lib (WebAssembly) to stitch the documents together into a single PDF. Download the result immediately.

When to Merge PDFs

  • Combine a cover letter and resume into one PDF
  • Merge monthly reports into an annual document
  • Combine contract pages from multiple sources
  • Create a single PDF from multiple scanned pages
  • Submit multiple documents as one file to a portal

Tips

  • Reorder files by dragging before merging
  • Check page orientation — rotate pages first if needed using the Rotate PDF tool
  • If the merged PDF is large, run it through the PDF Compressor afterward

Related Tools

Split PDF →PDF Compressor →PDF to JPG →Rotate PDF →