Zero Cloud Storage • 100% Private Client-Side
Merge PDF Files Online
Combine multiple documents into one polished PDF with customizable page ordering and zero cloud uploads.
Click to upload or drag & drop multiple PDF files to merge
Combine PDF documents in any order. 100% private in-browser merging.
Select 2 or More PDFsFILES TO MERGE:0 Documents
FAQ Hub
PDF Merging Frequently Asked Questions
Quick answers on combining PDF documents securely in your browser.
How do I merge multiple PDF files into one single document?
Upload two or more PDF files using our drag-and-drop zone. Arrange the order of your documents using the up/down arrows or trash button, then click "Combine & Merge PDFs". Your merged file will be assembled instantly inside your browser.
Are my confidential documents uploaded to any remote server?
No. MicroTools.dev processes all PDF pages 100% inside your web browser using WebAssembly. Your files never touch a cloud server or external database, ensuring total confidentiality for legal, financial, and personal records.
Is there a limit on file size or number of PDF documents?
Because merging happens directly in your browser using local CPU memory, there are no artificial file size limits or paywalls. You can combine dozens of pages with zero subscriptions.