Watermark PDF

Add a text watermark to PDF pages

Set the text, page range, opacity, position, rotation, and size without sending the document to a file API.

The PDF is processed locally and stays on this device.

Before you choose a file

One focused PDF task, handled locally.

  • 01Add a text watermark

    Use plain text up to 160 characters.

  • 02Control placement

    Choose opacity, rotation, size, and position.

  • 03Choose pages

    Apply it to all pages or a selected range.

  • 04Stay local

    Text and document bytes are not transmitted.

PDF rewriting noteEditing may remove document-level metadata, attachments, bookmarks, scripts, or digital signatures. Page visuals, text, and vectors are preserved where supported.
Your files never touch our servers.Your PDFs are processed on your device — no file upload or storage.

Text

Plain, readable watermarking

Add Latin letters, numbers, and common punctuation using an embedded standard PDF font.

Appearance

Control opacity and angle

Use a centered diagonal mark or choose a common page position, three rotation presets, and simple sizes.

Pages

Apply to some pages or all

Use page ranges and thumbnails to control exactly where the watermark appears.

Scope

Text watermark in this release

Image watermarks are intentionally deferred until local image embedding, transparency, and memory use are verified across browsers.