Edit & compose · quick answer
What Watermark PDF does
Use Watermark PDF to stamp text diagonally across every page of a PDF. The result is created in your browser and saved as a separate copy. Your document is not uploaded. Keep the original and inspect the mark against light and dark page content before sharing.
How to watermark pdf in your browser
- Choose one PDFSelect the document from the dropzone. The current tool accepts text watermarks, not a separate logo file.
- Review the settingsEnter the watermark text, such as DRAFT. It will be drawn diagonally on every page at a preset low opacity.
- Create and check the resultRun the tool, review the reported page count, size, or notes, then save the newly created file while keeping the original.
Limits worth knowing
- The result depends on the structure and quality of the source document, so visually inspect the exported file before relying on it.
Essential questions
Does Watermark PDF upload my file?
No. The selected file is opened and processed by code running in this browser tab. Document bytes and filenames are not sent to Filozy.
Will this change my original file?
No. Browsers cannot silently overwrite the file you selected. Filozy creates a separate result for you to save or pass to another local tool.