Unir PDF
Combine varios archivos PDF en un solo documento en segundos.
or drag and drop them here
How to Merge PDF Files
Step 1: Select your PDF files
Click "Select PDF files to merge" or drag and drop multiple PDF documents into the upload area. You can add as many files as you need.
Step 2: Reorder if needed
Review your selected documents in the order you want them merged. The first file listed will become the first pages of your merged document.
Step 3: Click Merge PDFs
Enter an output filename and click the "Merge PDFs" button. Your combined PDF will be processed entirely in your browser and downloaded automatically.
Frequently Asked Questions
Is it safe to merge my PDFs here?
Yes — 100% safe. All merging happens locally inside your browser using JavaScript. Your files are never uploaded to any server. PDFreeAI is entirely serverless.
How many PDFs can I merge at once?
There is no hard limit — you can merge as many PDFs as you want. For very large files or many PDFs, processing may take a moment depending on your device.
Will merging affect the quality of my PDFs?
No — the merge tool directly copies pages from the source PDFs without re-rendering them, so the original quality, fonts, and images are preserved exactly.