Free PDF Merger — Combine Multiple PDFs Into One File
PopularMerge multiple PDFs into one file
Combine multiple PDF files into a single document. Drag to reorder pages before merging. 100% free, no file size limits, processed in your browser.
About PDF Merger
PDF merging combines multiple separate PDF documents into a single continuous file. This is one of the most common document management tasks in professional, academic, and administrative contexts — gathering chapters, combining reports, or assembling application packages.
Rather than paying for software subscriptions or uploading sensitive documents to cloud services, this tool lets you merge PDFs directly in your browser. The pdf-lib library reads each uploaded file, copies all pages in the order you specify, and writes a new combined PDF that you can download immediately.
Common use cases include combining multiple scanned pages into one document, assembling a portfolio of PDF attachments for email, merging separately authored chapters of a report, joining bank statements from multiple months, and consolidating legal or contract documents.
The tool supports any valid PDF file regardless of content — text documents, scanned images, forms, and mixed-content PDFs all work. Drag and drop to reorder files before merging, then download the result in seconds. Output file size is approximately the sum of the input file sizes. No account, subscription, or software installation required.
Frequently Asked Questions
Is there a limit to how many PDFs I can merge?
There is no hard limit on the number of files. You can merge as many PDFs as your device memory allows. For most devices, merging 10–20 documents of typical size works instantly.
Can I change the order of pages before merging?
Yes. After uploading your files, drag and drop them in the list to reorder before clicking Merge.
Are my PDF files safe when I use this tool?
Yes. Files are processed securely on our servers — handled in memory and permanently deleted immediately after your merged PDF is returned. We never store, view, or share your documents.
Will the merged PDF preserve bookmarks, forms, and hyperlinks?
Basic content and formatting are preserved. Complex interactive elements like form fields and JavaScript actions may not transfer perfectly, as the tool performs a page-copy merge rather than a deep document merge.