Merge PDF files online, free and private
Merge PDF files free in your browser. Combine multiple PDFs into one, reorder pages, and download instantly. No upload, no sign-up, fully private.
100% private — files never leave your deviceUse ↑ ↓ to set the order, then merge.
How to use
- Add your PDFs. Drag and drop your PDF files onto the page or click to select them from your device.
- Reorder the files. Drag files into the exact sequence you want them to appear in the final document.
- Merge into one. Click merge and pdf-lib combines everything into a single PDF locally in your browser.
- Download the result. Save the merged PDF straight to your device. Nothing is ever uploaded.
Features
- 100% private. Files are processed entirely in your browser and never leave your device or touch a server.
- Drag to reorder. Arrange your PDFs in any order before merging so the final document reads exactly right.
- No limits or sign-up. Merge as many PDFs as your device can handle, with no account, no watermark, and no fees.
- Works offline. Once the page has loaded, you can merge PDFs without an internet connection.
- Powered by pdf-lib. Built on the trusted open-source pdf-lib library for reliable, standards-based PDF output.
When to use it
- Combine multiple scanned receipts or invoices into one file for expense reports.
- Join chapters or sections of a report, ebook, or thesis into a single document.
- Merge signed contract pages back together before sending to a client.
- Bundle a cover letter, resume, and portfolio into one PDF for a job application.
- Assemble several statements or forms into a single attachment that fits an email or Discord 25MB limit.
Is it private?
Your PDFs are merged entirely in your browser with pdf-lib and are never uploaded, stored, or seen by anyone but you.
Frequently asked questions
Is this PDF merger really free?
Yes. Merging PDFs here is completely free with no sign-up, no watermarks, no page limits, and no hidden upsell.
Are my files uploaded anywhere?
No. Your PDFs are read and combined entirely in your browser using pdf-lib. They never get uploaded to a server, so they stay private on your device.
How many PDFs can I merge and how big can they be?
There's no fixed limit, the practical ceiling is your device's memory. Merging many large files can be slow or may fail on low-memory phones, so on mobile try combining fewer or smaller files at a time.
Can I change the order of pages or files?
Yes. You can drag the files into any order before merging so the combined PDF follows the exact sequence you choose.
Does it work offline?
Yes. After the page has loaded once, the merging runs locally, so you can combine PDFs even without an internet connection.
Will merging reduce my file quality?
No. Pages are copied as-is into the new document, so text and images keep their original quality. The combined file size is roughly the sum of the originals.
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