← Andrew Sergeyev | CTO of ISD Group | Creative Digital Agency

Українська | English

Combine multiple PDFs into one file

Drag & drop, reorder, merge into one PDF. Runs locally in your browser.

100% free No registration Fully confidential No files upload

This is a quick PDF combiner I built for my own work. Add your files, change their order, and download a single merged PDF. Everything happens on your device; nothing is sent to the server. It stays free.

1. Add PDF files (free)

Drop PDFs here
or click to choose
You can add multiple files at once

Tip: the tool works offline after it loads. Keep this tab open and you're good.

2. Order & merge

No files yet — add some PDFs to see them here.
Drop PDF files to get started.

How it works

  1. Add one or many PDF files (drag & drop or click the drop area).
  2. Reorder them with arrows; remove anything you don't need.
  3. Click “Combine & download” to get a single PDF.
  4. Privacy: all operations happen in your browser; nothing is uploaded.
Use cases I had in mind: sending combined proposals, packing multi-page invoices, merging research papers into one pack, or stitching scans from your phone. Free forever, no signup.

Privacy & trust

Files never leave your computer. The merge runs with pdf-lib inside your browser; PDFs are kept only in your computer's memory.

How to verify: open DevTools → Network tab and merge a PDF. You’ll see no uploads of your files — only the initial script/fonts load.

Offline-friendly: after the page loads, switch your browser to “Offline” in DevTools and it still merges, proving nothing is sent out.

FAQ

What’s the limit? Your browser memory is the limit. I regularly merge 20–40MB worth of PDFs without issues. If you run out of memory, split the merge into two parts.

Why is it safe? The merge runs with an open-source library (pdf-lib) directly in your browser, so the files never leave your device.

Does it change page order? Only if you move items in the list. Otherwise, pages stay exactly as in your originals.




Contact

If you want a custom automation or have questions, ping me.

Signal: andyjam.27
Email: andy@isd-group.com
Threads: @andrewsergeyev
LinkedIn: andrew-sergyeyev
YouTube: @andrewsergeyev