Mark every page in one pass.

Place a centered text watermark across each page, with explicit control over opacity, angle and size.

Drop one PDF to begin

The file is checked and processed in local Web Workers.

Standard-font boundary: this tool accepts 1–120 printable ASCII characters only. It does not embed custom, CJK or emoji fonts.

The watermark is added with the built-in Helvetica font inside a local worker.