PDF Merger — Combine PDFs Free Online
Merge multiple PDF files into one document instantly. Drag to reorder, preview thumbnails, and download your merged PDF — 100% free, no signup required.
Why Choose Our Client-Side PDF Merger?
AllCloudTools provides a state-of-the-art PDF merger designed with a browser-first architecture. Unlike other utilities, your files are processed completely on your computer.
100% Secure & Private
No server uploads. Your confidential files stay on your device.
Lossless Quality
Font shapes, vector graphics, and image quality are preserved exactly as original.
No Installation Required
Runs in any web browser on desktop, tablet, and mobile instantly.
How to Combine PDF Files in 3 Simple Steps
Add PDF Files
Click the upload dropzone to browse your computer, or simply drag and drop your PDFs into the list container.
Arrange & Preview
Switch between List and Grid views. Click and drag the handles to sort the merge order, and click thumbnails to preview pages.
Merge & Save
Click the Merge button. Compilation is instant! Edit the output filename and click Download to save the document.
Frequently Asked Questions
Yes. The entire merging process runs locally in your web browser. Your files are never uploaded to any server or shared, ensuring 100% privacy and security.
You can merge up to 20 PDF files in a single operation, with each file up to 50 MB in size.
No. We use lossless merging — fonts, images, vector graphics, and all formatting are preserved exactly as in the original files.
Yes. On desktop, drag the rows into your preferred order. On mobile, use the up and down arrow buttons on each file row.
Yes, completely free with no hidden limits, no watermarks, and no account required.