Combine multiple PDFs into one document. Drag to reorder.
The PDF Merger on AD Tools is a powerful, browser-based utility that lets you combine multiple PDF files into a single, organized document. Whether you need to consolidate scanned receipts, merge chapter reports, combine presentation slides, or organize project documentation, our tool makes the process fast, secure, and effortless.
What makes our PDF Merger special is its intuitive drag-and-drop reordering. You can upload up to 20 PDF files at once, visually rearrange them into your exact desired page sequence using SortableJS, and merge them instantly. All processing happens 100% locally on your device using the advanced `pdf-lib` library, meaning your sensitive documents are never uploaded to any external server.
Unlike traditional desktop software that requires expensive licenses or complex installations, our PDF Merger is completely free, with no watermarks, no file limits, and no sign-ups. Just upload, arrange, merge, and download — it's that simple.
Merging PDFs on AD Tools is a simple 4-step process. Follow the guide below:
You can add your PDF files in two ways:
Supports PDF files only. Maximum 20 files per batch.
Once uploaded, your PDFs will appear in a list on the right side. You can:
The order of files in this list determines the exact page sequence in your final merged PDF.
Once you are satisfied with the order, click the "Merge PDFs" button. The tool will process your files locally in the browser. A loading spinner will indicate that the merging is in progress.
Once the merge is complete, a success message and a download section will appear. Click the "Download Merged PDF" button to save the combined document to your device.
Want to start over? Click "Clear All PDFs" or "Merge More PDFs" to reset the tool.
No, never. All PDF merging happens 100% locally on your device using JavaScript and the `pdf-lib` library. Your files are never uploaded to our servers or any third party. Your privacy is 100% guaranteed.
To ensure smooth performance in your web browser, the tool allows a maximum of 20 PDF files per batch. If you have more than 20 files, you can simply process them in multiple batches and merge the resulting PDFs together.
Yes! Before generating the PDF, you can easily reorder the files. Simply click and hold the six-dot handle icon next to any PDF in the list and drag it up or down to your desired position. The final merged PDF will follow this exact file sequence.
No. The tool copies the pages from your original PDFs exactly as they are. There is no re-compression or quality degradation, ensuring your final document maintains the exact same visual quality as the source files.
No, the tool cannot process encrypted or password-protected PDFs. You must unlock or remove the password from your PDF files using a PDF unlocking tool before attempting to merge them.
Since processing happens locally in your browser, there is no strict server-imposed file size limit. However, very large files (e.g., over 100MB total) may take longer to process and require more device RAM. For the best experience, we recommend keeping the total batch size under 50-100MB.
No, never. All generated PDFs are completely clean with no watermarks, no branding, and no hidden logos added by AD Tools. The output is exactly your combined documents.
No account, sign-up, or email registration is required. Just open the PDF Merger, upload your files, and start merging immediately. No personal information is collected.
Yes! The PDF Merger is fully responsive and works seamlessly on smartphones, tablets, laptops, and desktops. The interface automatically adapts to your screen size, making it easy to select and reorder files on touch devices.
Common use cases include:
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