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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">
<title>Redaction Checker | Verify if your PDF is truly redacted</title>
<meta name="title" content="Redaction Checker | Verify if your PDF is truly redacted">
<meta name="description" content="Check if your PDF is safely redacted. Our local-only tool detects hidden text layers, metadata, and unflattened elements. 100% private.">
<meta name="keywords" content="verify pdf redaction, check pdf safety, hidden text detector, pdf metadata checker, secure redaction verification">
<meta name="author" content="Just Redact">
<link rel="canonical" href="https://just-redact.com/redaction-checker.html" />
<!-- SEO: Open Graph / Social -->
<meta property="og:type" content="website">
<meta property="og:url" content="https://just-redact.com/redaction-checker.html">
<meta property="og:title" content="Is your PDF actually redacted? Find out now.">
<meta property="og:description" content="Hidden data often lurks beneath black boxes. Use our local checker to find searchable text and metadata. No uploads.">
<meta property="og:image" content="https://just-redact.com/social-preview.png">
<meta property="twitter:card" content="summary_large_image">
<!-- SEO: Structured Data -->
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "SoftwareApplication",
"name": "Redaction Checker",
"operatingSystem": "Web",
"applicationCategory": "SecurityApplication",
"offers": {
"@type": "Offer",
"price": "0",
"priceCurrency": "USD"
},
"featureList": [
"Hidden text layer detection",
"Metadata audit",
"Annotation verification",
"100% local processing"
],
"description": "A secure, browser-based utility to verify if a PDF document has been properly redacted and flattened."
}
</script>
<script src="https://cdn.tailwindcss.com"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
<style>
@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@400;500;600&display=swap');
body {
font-family: 'Inter', sans-serif;
color: #1f2937;
background-color: #f9fafb;
-webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
font-family: 'Crimson Pro', serif;
}
.drop-zone--over {
border-color: #10b981 !important;
background-color: #ecfdf5 !important;
}
</style>
</head>
<body class="flex flex-col min-h-screen">
<!-- Header -->
<header class="max-w-5xl mx-auto w-full px-6 py-8 flex justify-between items-center">
<a href="index.html" class="text-xl font-bold tracking-tight text-gray-900 font-serif flex items-center gap-2">
Just Redact.
</a>
<div class="flex gap-4">
<a href="redact.html" class="text-sm font-medium text-white bg-gray-900 hover:bg-gray-800 px-4 py-2 rounded-lg transition">Securely Redact Now</a>
</div>
</header>
<main class="flex-grow max-w-4xl mx-auto w-full px-6 pb-24">
<section class="text-center mt-8 mb-12">
<h1 class="text-4xl md:text-5xl font-semibold text-gray-900 mb-4">
Is your PDF actually redacted?
</h1>
<p class="text-lg text-gray-600 max-w-2xl mx-auto">
Hidden data often lurks beneath black boxes. Use our local checker to find searchable text, metadata, and unflattened layers.
</p>
</section>
<!-- Upload Zone -->
<div id="drop-zone" class="border-2 border-dashed border-gray-300 rounded-2xl p-12 text-center transition-all bg-white cursor-pointer hover:border-gray-400">
<input type="file" id="file-input" class="hidden" accept="application/pdf">
<div class="flex flex-col items-center">
<svg xmlns="http://www.w3.org/2000/svg" class="h-12 w-12 text-gray-400 mb-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
</svg>
<p class="text-xl font-medium text-gray-900 mb-1">Drop your PDF here</p>
<p class="text-sm text-gray-500">or click to browse from your device</p>
<p class="mt-4 text-xs text-gray-400 uppercase tracking-widest font-semibold">100% Local • No Uploads</p>
</div>
</div>
<!-- Analysis State -->
<div id="loading-state" class="hidden mt-12 text-center">
<div class="inline-block animate-spin rounded-full h-8 w-8 border-4 border-gray-300 border-t-gray-900 mb-4"></div>
<p class="text-gray-600 font-medium">Analyzing document safety...</p>
</div>
<!-- Results Dashboard -->
<div id="results-dashboard" class="hidden mt-12 animate-in fade-in duration-500">
<div class="grid md:grid-cols-3 gap-8">
<!-- Verdict Card -->
<div class="md:col-span-1 bg-white p-8 rounded-2xl shadow-sm border border-gray-100 flex flex-col items-center justify-center text-center">
<h2 class="text-sm font-bold text-gray-400 uppercase tracking-widest mb-6">Security Verdict</h2>
<div id="verdict-icon" class="mb-4">
<!-- Icon injected by JS -->
</div>
<p id="verdict-text" class="text-3xl font-bold mb-2"></p>
<p id="health-score" class="text-sm text-gray-500"></p>
</div>
<!-- Details Column -->
<div class="md:col-span-2 space-y-6">
<!-- Searchable Text -->
<div class="bg-white p-6 rounded-2xl shadow-sm border border-gray-100">
<div class="flex justify-between items-center mb-4">
<h3 class="font-bold text-gray-900 flex items-center gap-2">
<svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 text-gray-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0zM10 7v3m0 0v3m0-3h3m-3 0H7" />
</svg>
Searchable Text Layer
</h3>
<span id="text-badge" class="px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider"></span>
</div>
<p id="text-description" class="text-sm text-gray-600 leading-relaxed">
Searching for hidden text that remains selectable or searchable even if covered by black boxes.
</p>
</div>
<!-- Metadata -->
<div class="bg-white p-6 rounded-2xl shadow-sm border border-gray-100">
<div class="flex justify-between items-center mb-4">
<h3 class="font-bold text-gray-900 flex items-center gap-2">
<svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 text-gray-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
</svg>
Document Metadata
</h3>
<span id="metadata-badge" class="px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider"></span>
</div>
<div id="metadata-list" class="space-y-2 mb-4 hidden">
<!-- Table injected by JS -->
</div>
<p id="metadata-description" class="text-sm text-gray-600 leading-relaxed">
Checking for hidden properties like Author, Producer, or Tool used that can leak identity or workflow details.
</p>
</div>
<!-- Annotations -->
<div class="bg-white p-6 rounded-2xl shadow-sm border border-gray-100">
<div class="flex justify-between items-center mb-4">
<h3 class="font-bold text-gray-900 flex items-center gap-2">
<svg xmlns="http://www.w3.org/2000/svg" class="h-5 w-5 text-gray-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z" />
</svg>
Unflattened Annotations
</h3>
<span id="annotations-badge" class="px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider"></span>
</div>
<p id="annotations-description" class="text-sm text-gray-600 leading-relaxed">
Detecting shapes, highlights, or comments that are "objects" on top of text rather than being part of the image.
</p>
</div>
</div>
</div>
<!-- Call to Action -->
<div id="cta-unsafe" class="mt-12 p-8 bg-gray-900 rounded-3xl text-center text-white hidden">
<h3 class="text-2xl font-bold mb-4 font-serif">Hidden data detected. Fix it now.</h3>
<p class="text-gray-400 mb-8 max-w-xl mx-auto">
Your PDF isn't fully redacted. Use Just Redact to permanently flatten this document into a secure image.
</p>
<a href="redact.html" class="inline-block bg-green-600 hover:bg-green-700 text-white font-bold py-4 px-10 rounded-full shadow-lg transition-transform transform hover:-translate-y-0.5">
Launch Secure Redactor
</a>
</div>
<div id="cta-safe" class="mt-12 p-8 bg-green-50 border border-green-100 rounded-3xl text-center hidden">
<h3 class="text-2xl font-bold text-green-900 mb-4 font-serif">This document is secure.</h3>
<p class="text-green-700 mb-0">
No text layers or hidden metadata were found. This PDF appears to be properly flattened.
</p>
</div>
</div>
</main>
<!-- Footer -->
<footer class="bg-white py-12 border-t border-gray-100">
<div class="max-w-4xl mx-auto px-6 text-center text-sm text-gray-500">
© 2026 Just Redact. All processing happens 100% in your browser.
</div>
</footer>
<script>
pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js';
const fileInput = document.getElementById('file-input');
const dropZone = document.getElementById('drop-zone');
const resultsDashboard = document.getElementById('results-dashboard');
const loadingState = document.getElementById('loading-state');
// UI Elements for Results
const verdictIcon = document.getElementById('verdict-icon');
const verdictText = document.getElementById('verdict-text');
const healthScore = document.getElementById('health-score');
const textBadge = document.getElementById('text-badge');
const textDescription = document.getElementById('text-description');
const metadataBadge = document.getElementById('metadata-badge');
const metadataList = document.getElementById('metadata-list');
const metadataDescription = document.getElementById('metadata-description');
const annotationsBadge = document.getElementById('annotations-badge');
const annotationsDescription = document.getElementById('annotations-description');
const ctaUnsafe = document.getElementById('cta-unsafe');
const ctaSafe = document.getElementById('cta-safe');
dropZone.addEventListener('click', () => fileInput.click());
dropZone.addEventListener('dragover', (e) => {
e.preventDefault();
dropZone.classList.add('drop-zone--over');
});
['dragleave', 'dragend'].forEach(type => {
dropZone.addEventListener(type, () => {
dropZone.classList.remove('drop-zone--over');
});
});
dropZone.addEventListener('drop', (e) => {
e.preventDefault();
dropZone.classList.remove('drop-zone--over');
if (e.dataTransfer.files.length) {
fileInput.files = e.dataTransfer.files;
handleFile(e.dataTransfer.files[0]);
}
});
fileInput.addEventListener('change', (e) => {
if (fileInput.files.length) {
handleFile(fileInput.files[0]);
}
});
async function handleFile(file) {
if (file.type !== 'application/pdf') {
alert('Please upload a PDF file.');
return;
}
// UI Transition
resultsDashboard.classList.add('hidden');
loadingState.classList.remove('hidden');
dropZone.classList.add('opacity-50', 'pointer-events-none');
const reader = new FileReader();
reader.onload = async function() {
const typedarray = new Uint8Array(this.result);
await analyzePDF(typedarray);
};
reader.readAsArrayBuffer(file);
}
async function analyzePDF(data) {
try {
const pdfDoc = await pdfjsLib.getDocument(data).promise;
let findings = {
wordCount: 0,
annotationCount: 0,
metadata: {},
metadataFound: false
};
// 1. Metadata Check
const { info, metadata } = await pdfDoc.getMetadata();
const sensitiveKeys = ['Author', 'Creator', 'Producer', 'Title', 'Keywords'];
sensitiveKeys.forEach(key => {
if (info[key] && info[key].trim().length > 0) {
findings.metadata[key] = info[key];
findings.metadataFound = true;
}
});
// 2. Page Analysis
for (let i = 1; i <= pdfDoc.numPages; i++) {
const page = await pdfDoc.getPage(i);
// Text Layer
const textContent = await page.getTextContent();
textContent.items.forEach(item => {
if (item.str && item.str.trim().length > 0) {
findings.wordCount += item.str.trim().split(/\s+/).length;
}
});
// Annotations
const annotations = await page.getAnnotations();
findings.annotationCount += annotations.length;
}
renderResults(findings);
} catch (err) {
console.error("Analysis failed:", err);
alert("Could not analyze PDF. It might be password protected or corrupted.");
loadingState.classList.add('hidden');
dropZone.classList.remove('opacity-50', 'pointer-events-none');
}
}
function renderResults(findings) {
loadingState.classList.add('hidden');
resultsDashboard.classList.remove('hidden');
dropZone.classList.remove('opacity-50', 'pointer-events-none');
let score = 100;
if (findings.wordCount > 0) score -= 50;
// Only penalize for personally identifiable metadata
const piiKeys = ['Author', 'Title', 'Keywords'];
const hasPII = piiKeys.some(key => findings.metadata[key] && findings.metadata[key].trim().length > 0);
if (hasPII) score -= 20;
if (findings.annotationCount > 0) score -= 30;
// Limit score
score = Math.max(0, score);
const isSafe = score === 100;
// 1. Verdict UI
verdictText.innerText = isSafe ? 'Safe' : 'Unsafe';
verdictText.className = `text-3xl font-bold mb-2 ${isSafe ? 'text-green-600' : 'text-red-600'}`;
healthScore.innerText = `Redaction Health Score: ${score}/100`;
verdictIcon.innerHTML = isSafe
? `<div class="bg-green-100 p-4 rounded-full"><svg xmlns="http://www.w3.org/2000/svg" class="h-12 w-12 text-green-600" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="3" d="M5 13l4 4L19 7" /></svg></div>`
: `<div class="bg-red-100 p-4 rounded-full"><svg xmlns="http://www.w3.org/2000/svg" class="h-12 w-12 text-red-600" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="3" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" /></svg></div>`;
// 2. Text Layer UI
if (findings.wordCount > 0) {
textBadge.innerText = 'Leaking';
textBadge.className = 'px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider bg-red-100 text-red-700';
textDescription.innerHTML = `<strong>Danger:</strong> Found <span class="text-red-600 font-bold">${findings.wordCount}</span> searchable words. This document has not been flattened.`;
} else {
textBadge.innerText = 'Clean';
textBadge.className = 'px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider bg-green-100 text-green-700';
textDescription.innerText = 'No searchable text found. The document is likely flattened into an image.';
}
// 3. Metadata UI
if (findings.metadataFound) {
metadataBadge.innerText = 'Visible';
metadataBadge.className = 'px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider bg-yellow-100 text-yellow-700';
metadataList.classList.remove('hidden');
let listHtml = `<table class="w-full text-sm text-left border-collapse">`;
for (const [key, value] of Object.entries(findings.metadata)) {
listHtml += `<tr class="border-b border-gray-50"><td class="py-2 font-medium text-gray-500 w-24">${key}</td><td class="py-2 text-gray-900 truncate max-w-xs">${value}</td></tr>`;
}
listHtml += `</table>`;
metadataList.innerHTML = listHtml;
metadataDescription.innerHTML = `<strong>Warning:</strong> Document properties contain potentially identifying information.`;
} else {
metadataBadge.innerText = 'Hidden';
metadataBadge.className = 'px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider bg-green-100 text-green-700';
metadataList.classList.add('hidden');
metadataDescription.innerText = 'No common sensitive metadata keys were found.';
}
// 4. Annotations UI
if (findings.annotationCount > 0) {
annotationsBadge.innerText = 'Found';
annotationsBadge.className = 'px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider bg-yellow-100 text-yellow-700';
annotationsDescription.innerHTML = `<strong>Warning:</strong> <span class="font-bold">${findings.annotationCount}</span> unflattened objects found. These might be shapes or highlights used for redaction.`;
} else {
annotationsBadge.innerText = 'None';
annotationsBadge.className = 'px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider bg-green-100 text-green-700';
annotationsDescription.innerText = 'No unflattened annotations or interactive elements detected.';
}
// 5. CTA Visibility
if (isSafe) {
ctaSafe.classList.remove('hidden');
ctaUnsafe.classList.add('hidden');
} else {
ctaSafe.classList.add('hidden');
ctaUnsafe.classList.remove('hidden');
}
}
</script>
</body>
</html>
|
