Tool
Merge PDF
Upload your PDFs, drag to reorder if needed, and download them merged into one file.
Drop PDF files here, or click to browse
Add multiple PDFs — they will be merged in order
Merge PDFs in three steps
No software to install. Works in any browser, on any device.
Upload your PDFs
Click or drop to add multiple files at once. You'll see each file's name and page count.
Reorder if needed
Use the arrows to arrange files in the order you want them in the final document.
Merge and download
Hit Merge. Your combined PDF downloads instantly — nothing is uploaded to a server.
Files to merge
100% private
Files stay in your browser. Nothing is ever sent to a server.
Custom order
Reorder files before merging. The output follows your exact sequence.
No limits
Merge two files or twenty. No account, no file limit, no watermarks.
About the PDF Merger
Our free PDF merger lets you combine multiple PDF files into a single document in seconds, directly in your browser. Upload your files, reorder them using the arrow buttons if needed, and click Merge — your combined PDF downloads instantly.
This is useful in a wide range of situations: combining a multi-chapter report into one file, merging separate invoice pages, joining scanned documents, or combining a cover letter and CV before sending an application. Instead of installing desktop software, just open this page and merge.
The tool shows the page count for each PDF you upload so you always know what you're working with. Files are listed in merge order — number 1 becomes the first section of the output, number 2 comes next, and so on. Use the up and down arrows to rearrange them before merging.
All processing happens locally using the open-source pdf-lib library. Your PDF files are never uploaded to any server — they stay on your device the entire time.
Need more PDF tools? Split PDF, Remove PDF Pages, and PDF to JPG are all free and run the same way — entirely in your browser.
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Frequently Asked Questions
Is it safe to merge PDFs online?
Yes. This tool runs entirely in your browser — your files are never uploaded to a server. The merge happens locally using pdf-lib, so your documents don't leave your device at any point.
Can I merge password-protected PDFs?
Not directly. If a PDF requires a password to open, you'll need to remove it first. Most PDF readers let you do this by printing to PDF once you've unlocked the file. Owner-restricted PDFs (no open password) usually work fine.
Will merging PDFs reduce the quality?
No. Pages are copied directly from the source files without re-encoding anything. Images, fonts, and formatting are preserved exactly as they appear in the originals — the merge is completely lossless.
How many PDF files can I merge at once?
There's no hard limit. You can merge as many files as your browser's memory can handle. In practice, 20–30 average-sized PDFs works fine. Very large files may slow things down depending on your device, but no artificial cap is imposed.