Our free Merge PDF tool lets you combine two or more PDF files into a single document without uploading anything to a server. All processing happens directly in your browser using the pdf-lib library, so your files remain completely private. There are no file size limits, no watermarks, and no signup required.
How to Merge PDF Files
Click the file input or the "Add More Files" button to select your PDF files.
Arrange your files in the order you want them merged. Remove any unwanted files by clicking the remove button.
Click "Merge PDFs" and wait for the processing to complete.
Download your merged PDF file instantly.
Why Merge PDFs?
Combining PDF files is useful when you need to submit a single document that consists of multiple parts, such as combining cover letters with resumes, merging scanned pages, or consolidating reports. Our tool makes this process fast and secure since no data ever leaves your device.
There is no hard limit. You can merge as many PDF files as your browser's memory allows. For very large files, ensure you have enough RAM available.
Are my files uploaded to any server?
No. All processing happens entirely in your browser. Your PDF files never leave your device.
Will the merged PDF lose quality?
No. The merge process copies pages exactly as they are from the source files. There is no re-compression or quality loss.
Can I rearrange the order of files before merging?
You can remove files and re-add them in the desired order. The files will be merged in the order they appear in the list.
What is the maximum file size supported?
There is no server-side limit. The practical limit depends on your browser and available memory. Most modern browsers handle files up to several hundred megabytes.