PDF Merge

Combine multiple PDFs with drag-and-drop ordering and optional watermark.

Privacy-first

Data stays in this tab's memory only until you finish or leave the page. We do not save your files or text to storage.

Step 1: Select the PDF files. Drag the selected PDF file to reorder.

Recommended total size under 50 MB.

Drop PDFs here or click to browse Multiple files supported

Selected PDF List:

Step 2: Watermark (Optional)

Watermark text

Font size 36 pt

12–96 pt. Long text wraps automatically and stays centered on each page. Press Enter for a manual line break.

Step 3: Filename (optional)

Download filename

.pdf

Are my PDFs uploaded to a server?: No. Merging runs entirely in your browser using pdf-lib. Your files never leave your device.
Is there a file size limit?: Very large PDFs may slow your browser tab. We recommend keeping total size under about 50 MB for best performance.
Can I reorder PDFs before merging?: Yes. Drag and drop items in the file list to change merge order.
Does the watermark support images?: Text watermarks only. You can set the font size from 12 to 96 pt. Image watermarks may be added in a future update.

Split PDFs by page ranges or per page, optional watermark, download as ZIP.