PDF Watermark

Add a watermark in three steps

1. Choose one supported local PDF and wait for its page check. Keep all pages selected or enter the first and last document pages to stamp.
2. Choose Text or Logo. Set the position, margin, angle and opacity. Text has its own size and color; a logo keeps its oriented shape and scales to a percentage of each page's visible width.
3. Select Apply watermark. After the output check succeeds, download watermarked.pdf and inspect the selected pages before sharing or printing.

Choose a mark that remains readable

A watermark here is a visible addition above existing page content. It can identify a draft or add branding, but it is not access control, a digital signature or a way to prevent copying and editing.

Positive angles turn the watermark counterclockwise as you view the page. The page itself is not rotated. Position and margin apply to the rotated mark's visible bounds, including text that extends beyond its advance width.

Opacity controls the added mark, not the original page. A transparent logo keeps its own transparent areas; its alpha is multiplied by the selected opacity. No white background is added behind it.

Text uses bundled fonts rather than a font on your device. Ordinary supported Latin, Cyrillic and Chinese text is checked before export. Unsupported characters or text needing unsupported shaping are rejected rather than replaced with boxes.

Examples of page and logo settings

In an eight-page document, choosing pages 3–5 adds one mark to each of those three physical pages. Existing printed numbers and viewer page labels do not change which pages are selected.

On a visible page 600 points wide, a logo width of 30% is 180 points. An oriented 1200 × 400 logo becomes 180 × 60 points before rotation; another page width produces another physical logo size.

A centered DRAFT stamp at 20% opacity and 45 degrees can leave underlying text visible, but it can still cover important content. Change the settings and inspect the downloaded PDF rather than assuming a clear area was detected.

Compatibility and export limits

Use one supported PDF 1.0–1.7 up to 20 MiB and 500 pages. Encrypted or signed PDFs, forms, nonempty annotations such as links or comments, tagged documents, attachments and other unsupported structures are rejected, not stripped or repaired.

Text is one supported line of up to 100 characters after normalization. Logo mode accepts a supported non-animated PNG or JPEG up to 5 MiB and 4,194,304 pixels. PNG orientation metadata, CMYK JPEGs and unsupported text layouts are not accepted.

Every selected watermark must fit within the visible page and margin after rotation. If one page fails, no partial PDF is offered. The tool does not shrink marks automatically, find empty space or remove an existing watermark.

Export rewrites the document as PDF 1.7; internal bytes and file size can change, especially when a full Chinese font is embedded. Browser-prepared logos can change color or source bit depth. This is not PDF/A, PDF/UA, signature-preservation or identical-rendering certification.

Your local files and current download

This tool does not upload or store your PDF, logo or settings. Text mode may request fixed bundled font files without sending your text. Changing active inputs or cancelling removes the old download and retires the owned worker. The site's general privacy policy still applies.