Free Online Merge PDF
Combine multiple PDF files into one document
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About this tool
Merge multiple PDF files into a single document instantly with this free online PDF merger. Upload your PDFs, drag to reorder, and download one combined file — all processing happens in your browser using pdf-lib, so your documents never leave your device. Perfect for combining reports, contracts, presentations, or any PDF documents into a single file. No file size limits, no watermarks, no sign-up required. The tool preserves all formatting, images, links, and bookmarks from the original files. Works on any device with a modern browser.
How to use Merge PDF
- Upload PDFs. Click the upload area or drag and drop multiple PDF files.
- Reorder. Drag files to arrange them in the order you want.
- Merge. Click the Merge button to combine all files into one PDF.
- Download. Your merged PDF downloads automatically.
Frequently Asked Questions
Upload your PDF files using the file picker or drag and drop them onto the tool. Arrange them in the order you want, then click Merge. Your combined PDF downloads automatically.
There is no hard limit since everything runs in your browser. Very large files (100MB+) may be slow depending on your device's memory. For best results, keep total input under 200MB.
No. All merging happens locally in your browser using JavaScript. Your files never leave your device, making this one of the most private PDF merge tools available.
Yes. The tool copies pages exactly as they are, preserving all text, images, fonts, links, and formatting from the original PDF files.
Yes. After uploading, you can drag and drop files to rearrange them in any order before merging.
Any modern browser works: Chrome, Firefox, Safari, Edge. The tool uses standard web APIs and pdf-lib for PDF processing.
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