OfficeWorkKit← All tools / PDF tools
Add PDF watermark
Add a text watermark with adjustable opacity.
01 Choose files
ALL SORTED
Download file ↓Your file is ready.
Leave blank to use the default filename. The file extension is kept automatically.
Review the pages and contents of your downloaded PDF. Refreshing clears files and results.
Before you start
What are the file limits?
Up to 20 files, 20MB each and 50MB total. Spreadsheets: 50,000 rows, 200 columns, 1 million cells. PDFs: 300 pages total. Images: 16 megapixels each. Your device may require smaller files.
Where are my files stored?
File contents are processed in browser memory, without uploads or persistent app storage. Closing or refreshing the tab clears the work; downloaded files remain on your device.
Will the original file change?
A new PDF is created, leaving your originals unchanged. Check important documents before use. Image PDFs do not include OCR or text recognition.