Drop PDF files here or click to browse
Supports multiple PDFs โ drag to reorder after adding
How to Merge PDF Files Online for Free
Merging PDF files is one of the most common document tasks in any office or academic setting. Whether you're combining a cover letter with a resume, consolidating monthly reports, assembling a multi-chapter document, or combining signed contract pages, our PDF Merge tool handles it all instantly โ without sending your files to any server.
Unlike cloud-based PDF services that require you to upload sensitive documents to third-party servers, our tool uses PDF-lib, a fully open-source JavaScript library that runs entirely inside your browser. This means your documents stay on your device at all times. No account. No file size limits imposed by upload bandwidth. No privacy concerns.
The tool supports unlimited files and gives you full control over the merge order. Simply add your PDFs, drag the items in the list to rearrange them in the exact sequence you need, then click Merge. The resulting file downloads directly to your computer.
Tips for Getting the Best Results
- Page order matters โ Drag the file cards to set the exact sequence before merging. The final PDF will follow top-to-bottom order.
- Password-protected PDFs โ Remove password protection before merging. Most PDF viewers let you print to PDF to create an unprotected copy.
- Large files โ For very large files (100+ MB each), merging may take a few extra seconds. The progress bar will keep you updated.
- File naming โ The output is named "merged.pdf" by default. Rename it after downloading if needed.