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PDF Merger

Combine multiple PDF files into one. Drag to reorder files, then merge. 100% client-side — your files never leave your browser.

Drop PDF files here

Or click to browse — you can select multiple files at once

PDF files only · Processed entirely in your browser

How to Use
1
Upload PDF files — drag and drop one or more PDF files onto the upload area, or click to open the file browser. You can select multiple files at once.
2
Reorder if needed — drag files up or down in the list to set the order they appear in the merged output. The merged PDF pages follow this order top-to-bottom.
3
Remove unwanted files — click the ✕ button on any row to remove that file from the merge. You can also add more files at any time.
4
Click Merge PDFs — the tool combines all files in the listed order and downloads the result as a single PDF to your device.
FAQ
Is there a file size or page count limit? ▾
There is no hard limit — the tool is constrained only by your device's available memory. Very large PDFs (100+ pages at high resolution) may take a few seconds. As a practical guide, PDFs under 50 MB each work smoothly on most devices.
Are my PDF files uploaded to a server? ▾
No. All processing happens entirely in your browser using the pdf-lib JavaScript library. Your files are never sent to any server. This means the tool works offline once the page is loaded.
Can I merge password-protected PDFs? ▾
Password-protected PDFs cannot be merged — the tool will show an error for that file. You would need to remove the password using another tool first, then upload the unlocked file here.
Will the merged PDF keep the original quality? ▾
Yes. The tool copies pages at their original resolution and quality — no compression or re-rendering happens. Images, fonts, and vector content are preserved exactly as in the source files.

About PDF Merger

The PDF Merger combines two or more PDF files into a single document in any order you choose. Upload your PDFs by dragging them onto the drop zone or clicking to browse — the tool loads each file, renders a first-page thumbnail, and displays the page count so you can confirm you have the right documents. Drag rows up or down to set the order in which the files appear in the merged output.

Merging is done entirely in your browser with the pdf-lib library — none of your documents are ever transmitted to a server. Original page quality is fully preserved: fonts, images, vector graphics, and hyperlinks all carry over to the combined file exactly as they appear in the source PDFs.

Common Use Cases

How to Use

  1. Drop one or more PDF files onto the upload area, or click to open the file picker — you can select multiple files at once
  2. Drag the rows in the file list up or down to set the page order; the merged output will follow the top-to-bottom sequence
  3. Click the ✕ button on any row to remove a file, or click "+ Add More" to include additional PDFs
  4. Optionally rename the output file, then click "Merge PDFs" to combine and download the result instantly

Frequently Asked Questions

How many PDFs can I merge at once?

There is no hard limit on the number of files. The practical ceiling is your device's available RAM — merging dozens of large, image-heavy PDFs at once may slow down on lower-end hardware. For most office documents (contracts, reports, invoices), merging 10–20 files works smoothly.

Are hyperlinks and bookmarks preserved in the merged PDF?

Hyperlinks embedded on individual pages are preserved. However, document-level bookmarks (the outline/navigation tree) and cross-document internal links are not automatically merged or remapped. The pdf-lib library copies page objects as-is, so in-page link annotations carry over but the bookmark tree is not combined.

Does the merger work offline?

Yes, once the page has fully loaded in your browser (including the pdf-lib library), the merger works without an internet connection. Your PDFs are read directly from your local disk and the merged output is generated entirely in memory before being downloaded.

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