Merge PDF Files Online for Free
Combine multiple PDF files into one document online. Free, fast, and secure with no signup or watermark.
How to Merge PDF Files Online
Upload PDFs
Select your PDF documents or drop them into the file area. Files are processed locally in your browser.
Arrange Page Order
Drag and drop lists to adjust the file order or use up and down reordering keys.
Combine Documents
Click the Merge button to stitch PDF pages together securely in your browser.
Download
Save your unified document instantly without any server file uploads.
Secure and Private PDF Merger
Unlike online tools that copy your PDF files onto cloud storage systems, PixoPDF handles all combining steps locally in your browser. Since none of your document metadata, structural elements, or signatures are sent over the network, your documents are not uploaded to a PixoPDF processing server.
Frequently Asked Questions
Is there a file count limit for merging?
PixoPDF supports merging up to 100 PDF documents at once, with an aggregate size threshold limit of 500 MB to prevent web browser tab execution delays.
Will the quality of my PDFs degrade after merging?
No. Our client-side merger copies raw page data blocks directly into the newly constructed document, preserving resolution and format properties without compression degradation.