Merge multiple PDF files into one document directly in your browser. 100% private — files never uploaded to any server. Free PDF merger. No signup required.
PDF merging is a daily task for professionals who need to combine contracts, reports, invoices, or presentation slides into a single document for email or archiving. Unlike desktop software, this tool requires no installation and processes files entirely in your browser, meaning sensitive financial or legal documents are never exposed to a third-party server.
All processing for PDF Merger runs entirely in your browser. Your data — whether text, files, or other content — is never transmitted to any server. DevToolHub has no backend that receives or stores your inputs. This means the tool works even offline once the page has loaded, and there is no risk of your data being intercepted or stored by a third party.
Are my PDF files sent to a server?
No. The entire merge operation runs inside your browser. Your files never leave your device, so sensitive documents — contracts, financials, medical records — remain completely private.
Is there a limit to how many files I can merge?
There is no hard file count limit. The merger handles multiple PDFs sequentially in your browser. Performance depends on total file size — for very large documents, the process may take a few extra seconds.
Will the merged PDF preserve bookmarks and links?
Internal hyperlinks within each source PDF are preserved in the merged output. Cross-document links are not automatically remapped after merging — those will need manual updating.
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