quialo.

Merge PDFs

All processing happens in your browser
Drop PDF files here, or click to browse
Multiple files supported. Order can be changed after adding.

Add PDF files by clicking or dropping them here. They never leave your browser.

Select or drop several PDFs, change their order with the up and down buttons if needed, and merge them into one file. The tool loads each document, copies the pages in the order you chose, and produces a downloadable PDF without sending anything to a server.

How to use

  1. Add your PDF files by clicking the drop zone or dragging them in. You can add more at any time.
  2. Review the list. Use the arrow buttons to reorder files so pages appear in the sequence you want.
  3. Click Merge PDFs. The tool processes everything locally and shows a summary when done.
  4. Click Download to save the merged PDF to your computer, or Reset to start fresh.

Examples

  • Merge a 2 page cover.pdf and a 5 page report.pdf to produce a single 7 page document named cover-merged.pdf.
  • Drop three PDFs in any order, reorder the middle one to the top, and merge. The output respects your final list order.
  • Select only one PDF. The tool still works and produces a renamed copy with -merged appended so you have a clean version.

FAQs

Is my PDF content uploaded anywhere?
No. All reading, page copying, and saving happens inside your browser using pdf-lib. The files never leave your computer.
Can I reorder pages inside a single PDF?
This version merges whole files in the order you list them. To rearrange pages inside one file, split it first or use a dedicated page tool (coming soon).
What happens with very large files?
Browser memory limits apply. Most documents under 50 MB each merge quickly. If you see an error, try fewer files or reduce their size in a viewer first.
Does the tool preserve bookmarks, forms, or annotations?
Basic page content is preserved. Advanced features such as form fields, links, and metadata may be simplified during the merge. For exact fidelity with complex files, test the output.
Why does the filename end with -merged?
When you merge a single file the tool appends -merged so the output is easy to distinguish from the original. When merging two or more the generic merged.pdf name is used.

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