๐ PDF Merge
Combine multiple PDF files into one โ free, in your browser.
PDF Merge: Combine multiple PDFs into one
PDF Merge lets you combine multiple pdfs into one. Upload multiple PDFs and get one merged PDF โ all processed locally in your browser, with no uploads and no sign-up.
Combine scanned pages into a single document
Combine scanned pages into a single document. This is one of the most common reasons people reach for PDF Merge โ and it handles the job in seconds, entirely in your browser.
Merge multiple reports into one file
Merge multiple reports into one file. This is one of the most common reasons people reach for PDF Merge โ and it handles the job in seconds, entirely in your browser.
Join PDF chapters into a book
Join PDF chapters into a book. This is one of the most common reasons people reach for PDF Merge โ and it handles the job in seconds, entirely in your browser.
Everything You Need in a PDF Merge
Powerful features that make PDF Merge fast, private, and free.
Instant Processing
PDFs are processed in your browser the moment you upload.
100% Private
Your PDFs never leave your device โ no server uploads.
Text-Based Output
Conversions produce real, searchable, selectable text.
All-in-One PDF Suite
Merge, split, edit, annotate, convert โ 25+ PDF tools.
Free Forever
No sign-up, no watermarks, no page limits.
Cross-Platform
Works on Windows, Mac, Linux, iOS, and Android.
How to Use
Add your PDFs in order
Click or drag to add the files you want to combine. The order they appear in the list is the order the pages will use, so add the cover or title page first. You can drag the file cards to reorder them before merging.
Review the page sequence
The preview shows each file's page count and position. Scan the list top to bottom to confirm nothing is out of order โ a misplaced appendix or rotated section is much easier to fix now than after merging.
Click merge to combine
The tool reads every page locally with pdf-lib and rebuilds a single document. A large report with scanned pages may take a few seconds, but nothing leaves your browser during the process.
Download the merged file
Save the combined PDF and open it to verify every section landed in the right place. Keep your original files as a backup until you are satisfied with the result.
Detailed User Guide
Order matters: arrange before you merge
Pages are combined in the order you added the files, top to bottom. Putting a cover page first and an appendix last produces a clean, professional document, while careless ordering leaves readers hunting for sections.
What pdf-lib copies and what it drops
This tool runs entirely in your browser with pdf-lib. It copies every page into a new document, keeping text, images, and vector shapes intact. Interactive features โ form fields, JavaScript actions, and digital signature seals โ are flattened or removed because they are tied to the original file.
Password-protected files need unlocking first
If any source PDF is encrypted with an owner or user password, pdf-lib cannot read it and the merge will fail. Unlock the file first with the PDF Unlock tool, then bring the clean copy back here.
Large reports can be slow but stay private
A 200-page document with scanned images can take a few seconds to rebuild because every page is processed locally. That trade-off is deliberate: nothing is uploaded, so confidential contracts and financial reports never leave your machine.
Bookmarks and outlines are not preserved
Merging creates a flat page stream. If your sources had a clickable table of contents or bookmarks, those links will be gone in the output. Re-create them afterward in a PDF editor if the merged file needs internal navigation.
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