🔒 Free · No signup · Files stay private

Merge PDF Files Online — Free & Unlimited

Combine multiple PDFs into one document. Free, unlimited, no signup.

Merge PDF now → All tools
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Drop your file here

or click to browse — your file never leaves your browser

1

Upload PDFs

Click or drag multiple PDFs into the drop zone.

2

Arrange order

Drag to reorder pages or files.

3

Click Merge

Files combine locally using PDF.js.

4

Download

Your merged PDF saves instantly.

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100% Private

Files never leave your browser. Zero data sent to servers.

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Mobile Friendly

Works on iPhone, iPad, and Android browsers.

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No Limits

Merge 2 files or 200. No daily quotas.

Frequently Asked Questions

Is this tool really free?

Yes — 100% free with no signup, no subscription and no limits. All processing happens in your browser.

Are my files stored anywhere?

Never. Processing happens entirely in your browser. Files never leave your device.

Is it secure?

Yes. PDF.js (Mozilla's open-source library) runs locally and ignores scripts embedded in PDFs.

Does it work on mobile?

Yes — iOS Safari 14+, Chrome and Firefox on Android fully supported.

Will there be a watermark?

No. CuroPDF never adds watermarks to your output files.