Local Processing

Watermark PDF

Add single or tiled text watermarks with color, opacity, rotation, and positioning. Includes a Chinese font; other scripts may need a local font.

Runs locallyNo uploadYour input is processed in your browser.

Watermark PDF

Add single or tiled text watermarks with color, opacity, rotation, and positioning. Includes a Chinese font; other scripts may need a local font.

Image format

PDF → PDF

Limits and compatibility

30 MiB per file, 90 MiB total, 150 pages, 50 files; 16 million pixels per image. Device capacity varies. Editing may invalidate digital signatures or alter special PDF features. Interactive forms and signed PDFs are unsupported. Scanned pages remain images; no OCR.

Examples

Watermark PDF

Input example
DRAFT
Output example
PDF + DRAFT

Add single or tiled text watermarks with color, opacity, rotation, and positioning. Includes a Chinese font; other scripts may need a local font.

Privacy note

Your files stay in your browser.

How to use

  1. Step 1. Choose files or drop them here
  2. Step 2. Add single or tiled text watermarks with color, opacity, rotation, and positioning. Includes a Chinese font; other scripts may need a local font.
  3. Step 3. Generate
  4. Step 4. Download

FAQ

Are my files uploaded?

Your files stay in your browser.

Which formats are supported?

PDF → PDF

What are the processing limits?

30 MiB per file, 90 MiB total, 150 pages, 50 files; 16 million pixels per image. Device capacity varies.

Are signatures and forms preserved?

Interactive forms and signed PDFs are not supported. Use a flattened, unsigned copy.

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