How to Merge PDFs (Client-side, Privacy-first)

Published on 2026-01-15 · Combine multiple PDF files without uploading. Drag, reorder, and download a merged document.

Need to combine multiple PDFs into one document? This guide walks through merging PDFs completely in your browser — no uploads, no accounts, no privacy concerns.

Why merge client-side?

When you use cloud-based PDF tools, your documents travel through third-party servers. With client-side merging, every file stays on your device. This is essential for contracts, financial reports, medical records, and any sensitive paperwork.

Quick steps

1. Open joinpdf.top and go to Merge PDFs.
2. Select multiple PDF files, or drag them directly onto the merge card.
3. Drag items in the list to reorder them — the top file becomes page 1.
4. Optionally set an output filename.
5. Click Merge Files to download the combined PDF.

Tips for better merges

• Each file shows a first-page preview and page count — use this to verify the right files are selected.
• The merge list supports both drag-and-drop and arrow buttons (▲/▼) for reordering on any device.
• Very large files (100MB+) can be slow — consider splitting first, then merging in batches.

Pro tip: combine split and merge

Want to extract pages 1-5 from file A and pages 10-15 from file B, then combine them? Use the Split tool on each file first, then merge the results. Both tools work entirely offline on joinpdf.top.

Try it now: PDF Split & Merge.