Add a text watermark to an unlocked PDF using local page previews, placement presets and browser-only export.
01 / UPLOAD PDF
Drop a PDF here or choose a local document to watermark.
One PDF · Up to 50 MB and 200 pages · Processed only in your browser.02 / WATERMARK TEXT
Bundled PDF Helvetica supports Western/WinAnsi text only. Unsupported Unicode is rejected rather than corrupted; no remote fonts are downloaded.
03 / PLACEMENT & PAGE RANGE
0 page(s) selected. Offsets and font size are in PDF points. If text will not fit a selected page, reduce its size or offsets.
04 / REPRESENTATIVE PREVIEW
Preview is rendered from a one-page PDF made by the same placement and export path as the full document; it reflects original page orientation and size. Refresh after changing options.
Choose a PDF and update the preview to view the watermark.
05 / EXPORT & DOWNLOAD
Existing pages remain vector PDF pages where supported. Adding a watermark can invalidate digital signatures; interactive forms, annotations or advanced PDF features may not survive modification. This is not DRM or copy protection.
All PDF operations run locally in your browser. No remote processing or fonts.
Your file or form details remain in your browser.
Review choices and validation before creating a result.
Check the preview and save the output locally.
Open one PDF, enter watermark text, opacity, font size, color, angle, placement, offsets and optional page range. Preview an actual modified page and download the PDF.
All-or-selected page targeting, five placements, angled translucent text, matching PDF preview and vector-preserving export.
PDFs remain in your browser. The bundled font supports Western/WinAnsi text only; modifying signed PDFs can invalidate their signatures.
Yes. Leave page range blank for all pages or enter a validated range such as 1-3, 5. A representative selected page can be previewed.
Yes. The preview is rendered from a one-page PDF produced using the same text placement and output path as the full export.
Choose center or four corners, then adjust font size, HEX color, opacity, angle and horizontal or vertical offset in PDF points.
No. The bundled PDF Helvetica font reliably supports Western/WinAnsi text. Unsupported characters are rejected with an explicit message.
No. A watermark is a visual marking, not DRM or copy protection. Modifying a signed document can invalidate its digital signature.
No. The watermark is added over copied PDF pages; the original page content remains vector-based where supported, and no PDF is uploaded.