Merge your PDF files
Drop PDF files here
or click the button below to browse PDF files from your device.
Files are merged locally in your browser for maximum privacy.
PDFs are merged in the order shown above. Use the arrow buttons to rearrange before merging.
Merge options
This tool keeps the original page sizes and orientation of your PDFs.
For large files, merging may take a little longer — keep this tab open until the download starts.
Coming soon: page selection and per-document bookmarks.
Why use this merge PDF tool?
GoPDFTools merges PDFs directly on your device, making it ideal for sensitive documents and busy workflows.
Fast, no-signup merging
Combine dozens of PDF files in seconds without accounts, logins or email confirmations.
Privacy-first workflow
All processing happens locally in your browser, so contracts, invoices and IDs stay on your device.
Perfect ordering control
Reorder PDFs before merging so your final document flows exactly the way you want.
Merge PDF – Frequently asked questions
Answers to the most common questions about combining PDF files with GoPDFTools.
What is a PDF Merger?
A PDF merger allows you to combine multiple PDF documents into a single, organized file. This is extremely useful for students, businesses, freelancers, remote workers and anyone who needs to compile reports, scanned pages, contracts, assignments or receipts. With GoPDFTools, merging PDFs is fast, secure and completely private — all processing happens in your browser with no server uploads.
Why merge PDF files?
Combining multiple PDFs helps create clean, well-organized documents that are easier to share, print and archive. Whether you are submitting homework, sending client reports, merging scanned photos, compiling receipts for reimbursement, or bundling contracts, merging PDFs removes clutter and keeps everything in the correct order.
How does GoPDFTools Merge PDF work?
Our PDF merger uses JavaScript-based processing inside your browser. When you upload your PDF files, they are loaded locally, rendered page-by-page, and merged into a single high-quality PDF — without uploading any content to external servers. This ensures maximum privacy, high speed and secure file handling.
Key features of this PDF merger
- ✔ 100% private — no uploads, no tracking
- ✔ Merge unlimited PDF files
- ✔ Drag-and-drop ordering
- ✔ Fast processing using modern browser technology
- ✔ No watermarks or hidden fees
- ✔ Works on mobile, tablet and desktop
How to merge PDF files
- Click Choose PDFs or drag your PDF files into the upload box.
- Arrange the files by dragging them into the correct order.
- Click Merge PDF to combine everything into one file.
- Download your merged PDF instantly.
Best use cases
- Merging scanned pages into a single document
- Bundling homework or university assignments
- Combining contracts, proposals or client deliverables
- Grouping receipts for reimbursement submissions
- Organizing business documents into one file
- Combining multi-part PDFs into a single final version
Related tools
You may also find these tools helpful: Split PDF, Delete & Reorder Pages, Compress PDF, PDF to JPG, Images to PDF.
Extended FAQs
1. Are my PDF files uploaded?
No — everything is processed locally in your browser.
2. Is there a limit on number of PDFs?
No — merge unlimited PDFs, limited only by your browser memory.
3. Does this tool add watermarks?
No watermarks. Completely free.
4. Can I reorder my PDF files?
Yes — drag files in the preview list to change their order.
5. Will the merged PDF keep original quality?
Yes — original resolution and formatting are preserved.
6. Does this work on mobile?
Yes — fully optimized for iPhone and Android browsers.
7. Can I merge password-protected PDFs?
You can merge them only if you unlock them first.
8. Can I merge PDFs with different page sizes?
Yes — the final PDF will include all page sizes as they are.
9. Is it safe to merge confidential documents?
Yes — the tool never uploads or stores files anywhere.
10. Does merging PDFs reduce file size?
Not necessarily. To reduce size, use
Compress PDF.
11. Can I merge scanned PDFs?
Yes — scanned documents merge perfectly.
12. Does this tool work offline?
Yes — after the page loads once.
13. Can I combine a very large number of pages?
Yes, but extremely large documents may slow down depending on device memory.
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All PDF tools in one lightweight toolbox.
Every tool is free, fast and runs directly in your browser with no file uploads.