PDF Merger
Combine multiple PDF files into a single document.
About PDF Merger
Whether you are assembling a report from separate chapters, combining scanned pages into one document, or bundling invoices for accounting, joining PDFs should not require desktop software. This free PDF merger lets you merge PDF files online — no sign-up, no watermark, and no software to install. Add as many PDFs as you like, arrange them in the order you want, and download a single combined document in seconds. Best of all, everything runs locally in your browser: your files are never uploaded to a server, so even confidential contracts and financial documents stay entirely on your device.
The merger copies pages directly from your source files into the combined document, so fonts, images, layouts, and vector graphics come through exactly as they were — no recompression, no quality loss, and no altered formatting. Each file you add shows its page count and size, so you always know what the final document will contain before you combine your PDF files. Because processing happens on your own machine, it works offline once the page has loaded and is just as fast on Windows, Mac, Linux, or a phone — a handy replacement for paid tools when all you need is a quick merge.
How to merge PDF files online
- 1Drop your PDF files into the upload zone, or click it to browse. You can select multiple files at once.
- 2Review the file list — each entry shows its page count and size. Use the up and down arrows to change the order, click the X to remove a file, or click + Add more files to append others.
- 3Click Merge PDFs. You need at least two files; the pages are combined in the exact order shown in the list.
- 4Wait a moment while the documents are merged — a summary shows the total page count and file size of the result.
- 5Click Download merged PDF to save the combined document to your device.
Frequently asked questions
How many PDF files can I merge at once?
There is no fixed limit on the number of files — merge as many PDFs as you need in one go. Because everything is processed in your browser, the practical ceiling is your device’s memory, which comfortably handles typical documents with hundreds of pages.
Can I change the order of the PDFs before merging?
Yes. Each file in the list has up and down arrow buttons, so you can arrange the documents in any order before clicking Merge PDFs. You can also remove individual files or add more at any point before merging.
Will merging affect the quality or formatting of my PDFs?
No. Pages are copied directly from the source documents without re-rendering or recompression, so text, fonts, images, and layout remain exactly as they were in the original files.
Are my PDF files uploaded to a server?
No. The entire merge happens locally in your browser using JavaScript — your files never leave your device, nothing is uploaded, and nothing is stored or logged. This makes the tool safe to use even for sensitive contracts and financial documents.
What happens with password-protected or corrupted PDFs?
If a file cannot be read, the tool shows an error naming the problem file so you can remove or replace it. Password-protected PDFs may fail to load or merge incorrectly — decrypt them first for a reliable result.
Is this PDF merger free to use?
Yes — completely free, with no sign-up, no watermarks, and no limits on how many times you can use it.
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