PDF Tools
Merge PDF
Merge multiple PDF files into one document in the browser.
Your files are processed in your browser and are not uploaded to our servers.
PDF files
Drop PDF files here or click to browse
Add two or more files, then reorder them. Nothing is uploaded.
Merge
Add PDFs in the order you want them combined.
About this tool
Merge PDF copies pages from each file into a new document with pdf-lib, in the order you set.
How to use
- Add two or more PDFs.
- Reorder with the arrows.
- Merge and download merged.pdf.
Formula and methodology
Each source document’s pages are copied into a new PDFDocument and saved with object streams.
Worked example
cover.pdf then chapter.pdf becomes a single merged.pdf with cover pages first.
Frequently asked questions
Can I merge encrypted PDFs?+
No. Remove the password in another app first.
Are PDFs uploaded?+
No. pdf-lib runs in the browser.
Guides
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