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Merge PDF Files Online

🟢 Runs Locally — verified: your files are processed in this browser. No uploads.

Combine multiple PDFs into a single document in your browser. Drag to reorder, then download instantly — no uploads, no watermarks, no limits.

Start now ↓

Drop, process, download

Processing happens on your device — your documents never leave the browser.

How to use this tool

  1. 1

    Upload your PDF files

    Drag and drop two or more PDFs into the upload zone, or click to browse your device.

  2. 2

    Reorder them

    Drag the files into the order you want. The first file appears first in the merged document.

  3. 3

    Merge & download

    Click Merge PDFs. Your combined file is created locally and downloaded instantly.

Key features

At a glance

AspectWhat happens
Page qualityPreserved exactly (1:1 copy)
File sizeCombined size of the sources
OrderDrag files to reorder
PrivacyProcessed on your device only

Frequently asked questions

Is it safe to merge PDFs online?
Yes. Merging runs entirely in your browser with pdf-lib — your documents never leave your device.
Is there a limit on files or size?
No hard limits. Performance depends on your device memory, but typical multi-file merges are instant.
Does merging reduce PDF quality?
No. Pages are copied 1:1, so text, images and vector graphics are preserved exactly.

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