PaperKit › Organize › Merge PDF
Watermark and Compress PDF
Add a watermark and compress the result in a single local browser workflow. Chain PDF actions without uploads, accounts, or server processing.
Multi-step browser workflow
Add a watermark and compress the result in a single local browser workflow. PaperKit runs each step locally in the browser and passes the output to the next step.
Included transformations
- Watermark PDF — Add a diagonal text watermark to every page of a PDF, with adjustable opacity.
- Compress PDF — Reduce PDF size by re-encoding images and stripping metadata. Works for most scanned PDFs.
Open the PaperKit workflow builder
How to use Merge PDF
- Drop two or more PDFs.
- Reorder them if you like.
- Click Run — you’ll get one PDF.
Related PDF tools
- Split PDF — Split a PDF into multiple files by page ranges. Get one output per range, downloaded as a zip.
- Compress PDF — Reduce PDF size by re-encoding images and stripping metadata. Works for most scanned PDFs.
- Add Page Numbers — Add page numbers to a PDF in the position and style you choose. Free and private.
Frequently asked questions
How do I merge PDF files?
Drop two or more PDFs onto the merge tool, reorder them if you want, and click Merge. The combined PDF downloads instantly.
Is there a file size limit when merging PDFs?
PaperKit runs in your browser, so the only practical limit is your device memory. Most users merge dozens of PDFs without issues.
Are merged PDFs uploaded to a server?
No. The merge happens 100% in your browser, so your files never leave your device.