raatools/

Merge PDF

Combine multiple PDF files into a single document. Drag to reorder pages.

Drop PDF files here or click to select

PDF files only

What is PDF merging?

PDF merging combines multiple PDF files into a single document. This is useful for assembling reports from separate sections, combining scanned pages, merging signed documents, or creating a single file from multiple sources for easier sharing and printing. This tool processes everything in your browser — no upload to any server.

The merged document preserves each source PDF's content exactly — text, images, formatting, bookmarks, and page layout are all maintained. You can reorder the files before merging by dragging and dropping them into the desired sequence.

How to use this tool

Upload two or more PDF files by dragging and dropping them or clicking the file picker. Reorder the files by dragging them into the desired sequence. Click merge to combine them into a single PDF. Download the result. The tool shows the page count for each file and the total page count of the merged document.

Tips for merging PDFs

  • Check page orientation — mixing portrait and landscape pages in one document works fine but may look inconsistent.
  • Verify page order before merging — rearrange files by dragging them in the file list.
  • For large merges, check the total page count to ensure no files were missed.
  • If file size is a concern, compress the individual PDFs before merging.

Privacy guarantee

All PDF processing happens locally in your web browser. Your files are never uploaded to any server. The merged PDF is generated entirely on your device using client-side JavaScript. This ensures complete privacy for sensitive documents like contracts, financial records, and personal files.

Frequently asked questions

Can I merge PDFs with different page sizes?

Yes. Each page in the merged document retains its original dimensions. If one PDF has letter-size pages and another has A4 pages, both sizes will appear in the merged file. Most PDF viewers handle mixed page sizes without any issues.

Are bookmarks and links preserved?

Internal bookmarks and hyperlinks within each source PDF are generally preserved. However, cross-document links (a link in PDF A pointing to a page in PDF B) will not automatically work after merging. The tool preserves the structure of each source document as faithfully as possible.