HIMX Technology
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PDF Watermark Tool

Add a text watermark like CONFIDENTIAL or DRAFT to every page — diagonal or tiled, with adjustable opacity and color. Chinese and English supported. Files never leave your browser.

Files never leave your browser

How to use

  1. Upload or drag in a PDF file

  2. Type the watermark text and pick the layout, color and opacity

  3. Hit Add watermark & download to save the new file

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An HIMX developer talking face-to-face with a client at a work table in a bright studio, with a laptop and wireframes between them and Hong Kong buildings through the window

Need more than a tool?

Want a custom tool or system built for your business?

From websites and apps to automation systems — HIMX builds for Hong Kong businesses. Free consultation, reply within one working day.

Free consultation

Free to ask, no obligation — your details are only used to reply.

What happens next

  1. We usually reply within one business day

    A real person — the one who'll actually run your project, not an autoresponder.

  2. A free scoping conversation

    Online or in person, we map your goals, scope and timeline together. No pressure.

  3. A clear plan and fixed quote

    Scope, tech choices, timeline and a fixed price. No hidden fees.