Drag & Drop PDF Files Here
or click to select files
What is ZyncPDF?
ZyncPDF is an open-source, privacy-first suite of powerful PDF tools built for speed, simplicity, and total user control. We believe your documents should stay yours — always. Every operation in ZyncPDF happens directly inside your browser, meaning your files never leave your device. With no uploads, no tracking, no ads, and no registration, ZyncPDF provides a smooth, secure, and 100% private experience for all your PDF tasks — from converting and merging to compressing and editing.
Why use our Merge PDF tool?
- Completely Free & Unlimited: Combine as many PDF files as you want, as many times as you want, for free.
- Privacy First: Your files are processed directly in your browser. They are never uploaded to our servers, guaranteeing 100% privacy.
- Open Source: Our code is publicly available, so you can verify our privacy claims and even contribute to the project.
- Simple Drag-and-Drop Interface: Easily reorder your files before merging them into a single document.
- No Registration Required: Use our tools instantly without the need to create an account or provide any personal information.
- High-Quality Output: Your merged PDF will retain the quality and formatting of the original documents.
How to use the Merge PDF tool:
- Step 1: Drag and drop your PDF files onto the upload area, or click to select them from your device.
- Step 2: Rearrange the files by dragging and dropping them into the desired order.
- Step 3: Click the "Process Files" button to merge the documents.
- Step 4: Once processed, download your new, single PDF file from the results section.
Frequently Asked Questions (FAQ)
Absolutely. All processing happens in your browser, so your files never leave your device. We do not upload or store any of your documents, ensuring complete privacy.
Yes! After uploading your files, you can simply drag and drop them in the file list to set the correct order before you click the "Process Files" button.
There is no hard limit on the number of files you can merge. However, performance may vary depending on the size and complexity of your files and the capabilities of your computer.