PDF Merger
Combine multiple PDF files into one document with page ordering and customizable merge options. Perfect for document consolidation and creating comprehensive reports with professional merging capabilities.
Drop your PDFs here
or click to browse and select multiple
Complete Guide: PDF Merger
Everything you need to know about using this tool effectively
The PDF Merger combines multiple PDF files into one document directly in your browser. It uses pdf-lib to handle the merge locally, so no files are uploaded to a server. You can drag and drop files to set the page order, preview individual PDFs before merging, and choose a custom filename for the output. The original formatting, fonts, and images from each source file carry over to the merged result.
A browser-based tool that reads multiple PDF files using pdf-lib, extracts their pages, and assembles them into a single PDF in the order you specify. You select or drag in the files, rearrange them by dragging rows up or down, preview any file to verify its contents, then merge and download the result. Everything runs client-side - the files stay on your device from start to finish.
Combining scanned pages into one file
When a scanner outputs each page as a separate PDF, merge them into a single document with the correct page order.
Assembling reports or proposals
Pull together a cover page, executive summary, data sections, and appendices from separate PDFs into one deliverable.
Organizing academic submissions
Merge thesis chapters, reference lists, or assignment sections into a single file that meets submission requirements.
Consolidating legal or contract documents
Combine signed pages, exhibits, and cover sheets into one PDF for filing or distribution.
Building a portfolio or presentation deck
Stitch together project samples, case studies, or slide exports into a single shareable PDF.
Add your PDF files
Click the upload area or drag and drop PDF files from your file manager into the tool.
Reorder the files
Drag rows up or down to set the sequence the pages will appear in the merged document.
Preview before merging
Click any file in the list to preview its pages and confirm it belongs in the correct position.
Set a filename and merge
Enter a custom filename if you want one, then click merge to combine all PDFs into a single file.
Download the result
Once merging finishes, download the combined PDF. The original files remain unchanged on your device.
Prefix source filenames with numbers (01-, 02-, 03-) so they sort into the right order when you add them.
Use the preview to check page orientation - a landscape page mixed into portrait files is easy to catch before merging.
If you are merging dozens of large files and your browser slows down, split the work into two rounds and merge the intermediate files.
Keep your original files until you have verified the merged output - the tool does not modify them, but backups prevent surprises.
Give the output file a descriptive name at merge time so you can find it later without opening it.
Is there a limit to how many PDFs I can merge?
There is no hard limit built into the tool. The practical ceiling depends on your browser's available memory and the combined size of the files. If you hit slowdowns, merge in smaller groups first, then combine the results.
Are my files uploaded anywhere?
No. The tool uses pdf-lib to process everything inside your browser. Your files never leave your device, and nothing is sent to a remote server.
Does merging reduce the quality of my PDFs?
No. The merge copies pages from the source files without re-encoding them. Fonts, images, and vector graphics come through at the same quality as the originals.
Can I merge password-protected PDFs?
No. The tool cannot read PDFs that are encrypted with a password. You need to remove the password protection from those files first using a dedicated PDF unlocking tool, then add them to the merger.
What happens to bookmarks and links in the merged file?
Internal bookmarks and hyperlinks from the source files are carried over. Page-number references in bookmarks update to reflect their new position in the combined document.