Merge PDF Files Online
Combine multiple PDFs into one. Drag to reorder. Download instantly. No signup, no watermarks — 100% free.
How to Merge PDF Files
Upload Your PDFs
Click the upload area or drag and drop multiple PDF files. You can add up to 20 files at once and add more at any time.
Arrange the Order
Drag the file rows up or down to set the order you want. The merged PDF will follow this exact sequence.
Download Your PDF
Click "Merge PDFs" and your combined document is ready instantly. No email required — direct download.
Frequently Asked Questions
Is it safe to merge PDFs online with PDFForge?
Yes — 100% safe. PDFForge runs entirely in your browser using WebAssembly. Your files are never uploaded to any server. Nothing leaves your device.
How many PDF files can I merge at once?
You can merge up to 20 PDF files in one session. For larger batches, merge in groups and then combine the resulting files.
Will merging PDFs reduce the quality of my documents?
No. The merge is completely lossless — all text, images, fonts, vector graphics, and formatting are preserved exactly as they appear in the originals.
Can I merge password-protected PDFs?
PDFs with an owner password (editing restrictions) can usually be merged. PDFs that require a password to open must be unlocked first — use our free Unlock PDF tool.
Does PDFForge add a watermark to the merged file?
Never. PDFForge is completely free with no watermarks, no hidden fees, and no restrictions on the output file.
What happens to my files after I merge them?
Nothing — because they never leave your browser. All processing is done locally on your device. When you close the tab, the files are gone. We have zero access to your documents.
Does merging PDFs work on mobile devices?
Yes. PDFForge works on any modern browser including Safari on iPhone, Chrome on Android, and all desktop browsers — no app needed.