Merge PDF
Merge PDF files online free — combine multiple PDFs into one, in your exact order. Try it now; nothing is ever uploaded. Processed locally in your browser — the file is never uploaded.
Click or drop files here
or drag and drop
How to use merge pdf
- Choose a file
Select a PDF from your device.
- Set the options
Fill in any fields the tool needs, such as a page range or watermark text.
- Run and download
The result is generated locally and downloaded straight to your device.
Features
Pages are processed with pdf-lib/pdf.js entirely in your browser.
Very large PDFs are rejected with a clear message instead of freezing the tab.
The file is discarded from memory once you leave the page.
Supported formats and limitations
PDF files and browser-supported source formats vary by tool.
Use cases include personal workflows, content preparation, and quick checks. Review output before relying on it for legal, financial, accessibility, or production decisions.
Frequently asked questions
Is my PDF uploaded?
No. Processing happens locally using the pdf-lib library loaded into your browser.
Is there a size limit?
Files over 100 MB are rejected because very large PDFs can exhaust browser memory.
Does this change my original file?
No. A new file is generated and downloaded; your original file on disk is untouched.
How is this different from iLovePDF's merge tool?
Same core job — combine PDFs in the order you choose — but with no account, no daily merge limit and no file uploaded to a server: the merge happens in pdf-lib running in your own browser tab.