25tools

PDF Merger

Free

Merge multiple PDF files into one document entirely in your browser. No upload limits — your files never leave your device.

Drag & drop or click to upload

PDF only — no size limit

  1. 1

    Upload two or more PDF files using the upload zone.

  2. 2

    Drag the rows to reorder pages as needed.

  3. 3

    Click Merge PDFs — the download starts automatically in your browser.

Frequently asked questions

No. The PDF merger uses pdf-lib running entirely in your browser. Your files never leave your device.

As many as you like — there is no enforced limit since all processing happens locally.

The tool attempts to load encrypted PDFs but heavily protected files may not merge correctly.