Frequently Asked Questions
Find quick answers to the most common questions regarding our tools, file safety, device compatibility, and privacy protocols.
Is MergePDFFilesFree completely free to use?▾
Yes, 100% free! There are no hidden fees, subscriptions, or credit card requirements. You can process as many documents as you need without limits.
Are my files really private and safe?▾
Absolutely. We use a revolutionary 100% client-side architecture. All operations (merging, splitting, rotating, converting) happen directly in your browser’s local memory using WebAssembly. Your files never touch our servers or any cloud database.
Do you add watermarks to my merged documents?▾
No. We believe your documents belong to you. We never insert watermarks, branding logos, or promotional footers into your generated files.
Is there a limit on how many files I can upload?▾
There is no hard limit imposed by our platform. You can combine dozens of files simultaneously, constrained only by your device’s available RAM memory.
Can I use this service on mobile devices like iPhone and Android?▾
Yes. Our platform is fully responsive and optimized for mobile browsers including Safari, Chrome, and Firefox on iOS and Android smartphones and tablets.