Merge PDF files
Combine any number of PDF files into one, in the order you want — all in your browser.
.pdf · up to 100 MB
Preserve bookmarks/outlines from each source PDF.
Merging PDFs is the most common PDF task there is — contracts, receipts, homework, reports. This tool does it 100% in your browser: no upload, no waiting, no privacy concerns. Drop as many PDFs as you want, drag to reorder them, and get a single file back in seconds. There's no page limit and no file size ceiling beyond what your browser can hold in memory (~100 MB is comfortable).
How to use merge pdf files
- 1Drop your PDFs
Drag multiple PDF files into the drop zone, or click to pick them. You can add more later.
- 2Reorder if needed
Drag the thumbnails to rearrange. The final PDF will follow this exact order.
- 3Click Merge
Merging happens entirely in your browser. Even a 50-page merge finishes in under a second.
- 4Download
Save the combined PDF. Your source files are never uploaded anywhere.
Frequently asked questions
- Are my PDFs uploaded to your servers?
- No. Merging runs in JavaScript inside your browser tab. Nothing is sent anywhere.
- Is there a file limit?
- No hard limit. Browsers can comfortably handle 100 MB total across all files. Above that, use desktop software.
- Will bookmarks and links be preserved?
- Yes — internal links and bookmarks are kept by default. You can disable this in options if you want a flat file.
- Can I merge password-protected PDFs?
- Not directly. Unlock them first with our free PDF Unlock tool, then come back and merge.
- What's the max number of PDFs?
- There's no fixed cap. Practical limit is a few hundred files — your browser will warn before it runs out of memory.
- Does the output have a watermark?
- No. Never. We don't add anything to your files.