clientpdf/watermark.html at main · abyworkings-coder/clientpdf · GitHub

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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="theme-color" content="#0d0f0c" />
<meta name="format-detection" content="telephone=no, date=no, address=no, email=no" />
<link rel="preload" href="vendor/fonts/ibmplexmono-400.woff2" as="font" type="font/woff2" crossorigin />
<link rel="preload" href="vendor/fonts/fraunces-normal-300.woff2" as="font" type="font/woff2" crossorigin />
<meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'; style-src 'self'; img-src 'self' data: blob:; font-src 'self'; connect-src 'self' https://api.counterapi.dev https://formsubmit.co; object-src 'none'; base-uri 'self'; form-action 'self' https://formsubmit.co;" />
<meta name="referrer" content="strict-origin-when-cross-origin" />
<title>Add a text watermark to a PDF without uploading — ClientPDF</title>
<meta name="description" content="Stamp a text watermark across every page of a PDF — your text, opacity, and angle — entirely in your browser. Free, fast, private." />
<link rel="canonical" href="https://abyworkings-coder.github.io/clientpdf/watermark.html" />
<meta property="og:type" content="website" />
<meta property="og:title" content="Add a text watermark to a PDF without uploading it — ClientPDF" />
<meta property="og:description" content="Stamp a text watermark across every page of a PDF — your own text, opacity, and angle — entirely in your browser. Nothing is uploaded, ever." />
<meta property="og:url" content="https://abyworkings-coder.github.io/clientpdf/watermark.html" />
<meta property="og:site_name" content="ClientPDF" />
<meta property="og:image" content="https://abyworkings-coder.github.io/clientpdf/og-image.jpg" />
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="Add a text watermark to a PDF without uploading it — ClientPDF" />
<meta name="twitter:description" content="Stamp a text watermark across every page of a PDF — your own text, opacity, and angle." />
<meta name="twitter:image" content="https://abyworkings-coder.github.io/clientpdf/og-image.jpg" />
<link rel="icon" href="./logo.svg" type="image/svg+xml" />
<link rel="icon" href="./favicon-32.png" sizes="32x32" type="image/png" />
<link rel="icon" href="./favicon-16.png" sizes="16x16" type="image/png" />
<link rel="apple-touch-icon" href="./apple-touch-icon.png" />
<script type="application/ld+json">
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  "name": "ClientPDF Add Watermark",
  "url": "https://abyworkings-coder.github.io/clientpdf/watermark.html",
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  "description": "Stamp a text watermark across every page of a PDF entirely in your browser. Nothing is uploaded, ever.",
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}
</script>
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    },
    {
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      "position": 3,
      "name": "Watermark PDF",
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}
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<script type="application/ld+json">{
  "@context": "https://schema.org",
  "@type": "HowTo",
  "name": "How to add a text watermark to a PDF online without uploading it",
  "description": "Stamp text across every page of a PDF, entirely in your browser.",
  "datePublished": "2026-07-28",
  "dateModified": "2026-08-05",
  "step": [
    {
      "@type": "HowToStep",
      "position": 1,
      "name": "Drop one PDF",
      "text": "Drag and drop a single PDF file onto the page, or click to browse."
    },
    {
      "@type": "HowToStep",
      "position": 2,
      "name": "Type your watermark text",
      "text": "Enter the text you want stamped on every page."
    },
    {
      "@type": "HowToStep",
      "position": 3,
      "name": "Set the opacity and angle",
      "text": "Choose how visible and how rotated the watermark should be."
    },
    {
      "@type": "HowToStep",
      "position": 4,
      "name": "Click Add watermark",
      "text": "ClientPDF draws the text across every page with pdf-lib's native drawText, layered on top of the existing content without altering it."
    },
    {
      "@type": "HowToStep",
      "position": 5,
      "name": "Download the watermarked PDF",
      "text": "Save the file — the original page content underneath is fully intact."
    }
  ]
}</script>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<a class="skip-link" href="#main-content">Skip to main content</a>
<noscript><div class="noscript-banner">ClientPDF requires JavaScript — all files are processed locally in your browser and never uploaded. Please enable JavaScript to use these tools.</div></noscript>

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<header class="topbar">
  <div class="wrap topbar-inner">
    <div class="brand">
      <span class="brand-mark">◆</span>
      <span class="brand-name">Client<em>PDF</em></span>
    </div>
    <nav class="toolnav" aria-label="Tools">
      <a href="./index.html">Merge</a>
      <a href="./split.html">Split</a>
      <a href="./delete-pages.html">Delete Pages</a>
      <a href="./duplicate-pages.html">Duplicate Pages</a>
      <a href="./insert-pages.html">Insert Blank Pages</a>
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      <a href="./reorder.html">Reorder</a>
      <a href="./compress.html">Compress</a>
      <a href="./page-numbers.html">Page Numbers</a>
      <a href="./images-to-pdf.html">Images to PDF</a>
      <a href="./extract-images.html">Extract Images</a>
      <a href="./pdf-to-jpg.html">PDF to JPG</a>
      <a href="./watermark.html" aria-current="page">Watermark</a>
      <a href="./metadata.html">Metadata</a>
      <a href="./crop.html">Crop Pages</a>
      <a href="./resize.html">Resize Pages</a>
      <a href="./grayscale.html">Grayscale PDF</a>
      <a href="./border.html">Page Borders</a>
      <a href="./image-watermark.html">Image Watermark</a>
      <a href="./flatten.html">Flatten Form Fields</a>
      <a href="./fill-form.html">Fill Form Fields</a>
      <a href="./bookmarks.html">Add Bookmarks</a>
      <a href="./split-by-bookmarks.html">Split by Bookmarks</a>
      <a href="./pages-per-sheet.html">Pages per Sheet</a>
      <a href="./redact.html">Redact</a>
      <a href="./tools.html">All Tools</a>
      <a href="./guide.html">Guide</a>
    </nav>
    <div class="topbar-status">
      <span class="dot" aria-hidden="true"></span>
      <span>running locally in this tab — nothing uploaded</span>
    </div>
  </div>
</header>

<main class="wrap" id="main-content" tabindex="-1">

  <section class="hero">
    <h1>Open DevTools.<br />Watermark this PDF.<br />Watch nothing get sent anywhere.</h1>
    <p class="lede">
      Stamp your own text across every page — pick the wording, the opacity,
      and the angle — all inside this tab. Zero network requests after the
      page loads, same rule as every other tool here. Check the Network tab
      yourself.
    </p>
  </section>

  <section class="tool" id="tool">
    <div class="dropzone" id="dropzone" tabindex="0" role="button" aria-label="Add a PDF file">
      <input type="file" id="fileInput" accept="application/pdf" hidden />
      <div class="dropzone-inner">
        <span class="dropzone-icon">⇣</span>
        <p><strong>Drop one PDF here</strong> or click to browse</p>
        <p class="dropzone-hint">One file at a time · stays on this device</p>
      </div>
    </div>

    <div class="split-panel" id="wmPanel" hidden>
      <div class="split-meta" id="wmMeta"></div>

      <div class="split-range">
        <label for="wmTextInput">Watermark text</label>
        <input type="text" id="wmTextInput" value="CONFIDENTIAL" maxlength="80" />
      </div>

      <div class="split-mode" role="radiogroup" aria-label="Watermark angle">
        <label class="split-mode-option">
          <input type="radio" name="wmAngle" value="-45" checked />
          <span>Diagonal (-45°)</span>
        </label>
        <label class="split-mode-option">
          <input type="radio" name="wmAngle" value="45" />
          <span>Diagonal (45°)</span>
        </label>
        <label class="split-mode-option">
          <input type="radio" name="wmAngle" value="0" />
          <span>Horizontal (0°)</span>
        </label>
      </div>

      <div class="split-range">
        <label for="wmOpacityInput">Opacity (%)</label>
        <input type="text" id="wmOpacityInput" value="30" inputmode="numeric" />
      </div>
    </div>

    <ol class="file-list" id="fileList" aria-label="Loaded file"></ol>

    <div class="actions" id="actions" hidden>
      <button class="btn btn-ghost" id="clearBtn" type="button">Clear</button>
      <button class="btn btn-primary" id="watermarkBtn" type="button">
        <span id="watermarkBtnLabel">Add watermark</span>
      </button>
    </div>

    <div class="result" id="result" role="status" aria-live="polite" hidden></div>
  </section>

  <section class="proof">
    <h2 class="sr-only">Why trust this tool</h2>
    <div class="proof-live" id="proofLive">
      <span class="proof-live-dot" aria-hidden="true"></span>
      <span id="proofLiveText">0 network requests since page load · verified live, not our word for it</span>
    </div>
    <div class="proof-grid">
      <div class="proof-item">
        <h3>No accounts</h3>
        <p>No signup, no email, no watermark on the watermark tool. Use it and close the tab.</p>
      </div>
      <div class="proof-item">
        <h3>No limits (for now)</h3>
        <p>Watermark as many pages as your device's memory allows. No artificial caps.</p>
      </div>
    </div>
  </section>

  <section class="pro" id="pro">
    <div class="pro-card">
      <div class="pro-copy">
        <h2>Numbering, rotating, or compressing a PDF too? All live.</h2>
        <p><a href="./page-numbers.html">Stamp page numbers onto every page</a>, <a href="./rotate.html">fix pages scanned sideways</a>, or <a href="./compress.html">shrink the file size</a> — same rule: everything stays local. Leave your email and we'll let you know about a Pro batch mode.</p>
      </div>
      <form class="pro-form" id="proForm">
        <input type="email" id="proEmail" placeholder="you@company.com" required aria-label="Email address" autocomplete="email" />
        <button class="btn btn-primary" type="submit">Notify me</button>
      </form>
      <p class="pro-note" id="proNote" role="status" aria-live="polite" hidden>Thanks — saved locally for now, we'll be in touch once signups are live.</p>
    </div>
  </section>

<section class="about">
  <h2>Stamping text without touching the page underneath</h2>
  <p>Watermark draws your text across every page using pdf-lib's native <code>drawText</code>, with control over opacity and rotation angle — it's additive, layered on top of the existing content rather than replacing or reflowing it, so the original page is fully intact underneath if you ever need to remove the watermark by regenerating from the source file.</p>
  <p>Because it's drawn text rather than a burned-in image, the watermark stays crisp at any zoom level and adds only a few bytes per page to the file. One caveat that applies to this tool same as every other one here: a PDF encrypted with an open password can't be loaded at all before watermarking even starts — <a href="./guide-password-protected.html">here's why, and what your options are.</a></p>
</section>

</main>

<footer class="footer">
  <div class="wrap footer-inner">
    <span>ClientPDF — built by <a href="https://github.com/abyworkings-coder" target="_blank" rel="noopener">Auto Company</a></span>
    <span>No servers were harmed in the making of this tool.</span>
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