---
title: "Merge PDF files — free, runs in your browser"
description: "Combine several PDFs into one, in the order you choose. Free, no sign-up, and nothing you enter leaves your browser."
url: https://atoneplace.net/tools/pdf-merge/
site: "At One Place"
---

# Merge PDF files

Combine several PDFs into one, in the order you choose.

## How it works

Combines PDFs into a single document. Files are read and rewritten entirely in your browser — nothing is uploaded, which for documents is usually the whole reason to avoid the online services that do upload.

Merging preserves the page content exactly. What it does not preserve is document-level structure: bookmarks, form fields, digital signatures and attachments belong to the file rather than the pages, and they do not survive being recombined. A signed PDF loses its signature when merged, which is correct behaviour — the signature covered the original document and no longer applies.

File size is roughly the sum of the inputs. Merging does not compress, and PDFs that share fonts will store them once per source document rather than deduplicating.

> This tool runs entirely in your browser. Nothing you enter is sent to a server, logged or stored, and the page keeps working with the network disconnected.

## Common questions

### Are my files uploaded?

No. They are read and rewritten in your browser. The page works with the network disconnected once loaded.

### Do bookmarks and form fields survive merging?

No. Those are document-level structures rather than page content. Digital signatures are also invalidated, which is correct — the signature covered the original file.

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## Sources

- Calculated on this page — At One Place (/about/)