Merge PDF Files Online Free
Combine multiple PDF files into one. Drag to reorder, then merge and download instantly.
Drop your PDF files here
or click to browse files
PDF Merge Features
Simple and powerful PDF combining.
Merge Features
Drag and drop to reorder files before merging.
See the page count of each PDF file before merging.
All merging happens in your browser. No files are uploaded.
Output
Merge PDFs in seconds using the pdf-lib library.
Original formatting, images, and fonts are perfectly preserved.
No software installation needed. Works in any modern browser.
How to Merge PDF Files
Upload two or more PDF files, drag them into the order you want, then click Merge PDFs to combine them into a single file.
Frequently Asked Questions
Are my PDF files uploaded to a server?
No. All merging is done in your browser using pdf-lib.
Your files never leave your device.
For very large numbers of files, processing may take longer.
How many PDF files can I merge?
There is no hard limit. You can merge as many files as your device memory allows.
For very large files, merging may take a few seconds.
Your documents remain completely private.
Will the merged PDF keep all formatting?
Yes. All pages, images, fonts and formatting are preserved.
The merger simply combines pages from each PDF into a new document.
Page counts are shown for each file to help you organize.
Can I reorder the PDFs before merging?
Yes. Drag the file list items to set the order you want.
The merged PDF will follow the order shown in the list.
No quality is lost during the merge process.
Can I merge password-protected PDFs?
Password-protected PDFs cannot be merged without removing the password first.
Remove the password protection using a PDF editor before merging.
If you have the password, decrypt the PDF first, then merge.
Are there any file size limits?
There is no enforced limit, but very large PDFs may be slow to process in the browser.
This depends on your device's available memory.
Most standard documents will merge quickly.
What browsers are supported?
All modern browsers including Chrome, Firefox, Safari, and Edge.
JavaScript must be enabled.
The merged PDF preserves the original page sizes.
Can I remove individual pages?
You can remove an entire PDF file from the list using the remove button.
For removing individual pages, use the PDF Split tool.
A progress indicator shows the merge status.
Is this tool free?
Yes, completely free with no registration.
No limits on merges.
Drag-to-reorder is supported on touch devices.
Will the merged file be larger?
The merged file size is approximately the sum of all input file sizes.
No compression is applied during merging.
There are no watermarks added to your merged PDF.