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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" />
<!-- Primary Meta Tags -->
<title>PDF Security - Free Online PDF Security Tools | BentoPDF</title>
<meta
name="description"
content="Encrypt, decrypt, sign, and secure your PDFs with free online security tools. Password protection, digital signatures, permissions management. Privacy-first security in your browser."
/>
<meta
name="keywords"
content="pdf security, encrypt pdf, decrypt pdf, sign pdf, remove restrictions, change permissions, sanitize pdf, flatten pdf, linearize pdf, remove metadata, pdf layers"
/>
<meta name="author" content="BentoPDF" />
<meta name="robots" content="index, follow, max-image-preview:large" />
<!-- Canonical URL -->
<link rel="canonical" href="https://www.bentopdf.com/pdf-security" />
<!-- Open Graph -->
<meta property="og:type" content="website" />
<meta property="og:url" content="https://www.bentopdf.com/pdf-security" />
<meta
property="og:title"
content="PDF Security - Free Online PDF Security Tools | BentoPDF"
/>
<meta
property="og:description"
content="Encrypt, decrypt, sign, and secure your PDFs with free online security tools. Password protection, digital signatures, permissions management. Privacy-first security in your browser."
/>
<meta
property="og:image"
content="https://www.bentopdf.com/images/og-pdf-security.png"
/>
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />
<meta property="og:site_name" content="BentoPDF" />
<!-- Twitter Card -->
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="PDF Security - Free Online Tools" />
<meta
name="twitter:description"
content="Encrypt, decrypt, sign, and secure your PDFs with free online security tools. Password protection, digital signatures, permissions management. Privacy-first security in your browser."
/>
<meta
name="twitter:image"
content="https://www.bentopdf.com/images/twitter-pdf-security.png"
/>
<meta name="twitter:site" content="@BentoPDF" />
<link href="/src/css/styles.css" rel="stylesheet" />
<script type="module">
import '@phosphor-icons/web/regular';
</script>
<!-- Web App Manifest -->
<link rel="manifest" href="/site.webmanifest" />
<!-- Favicons -->
<link rel="icon" type="image/svg+xml" href="/images/favicon.svg" />
<link
rel="icon"
type="image/png"
sizes="192x192"
href="/images/favicon-192x192.png"
/>
<link
rel="icon"
type="image/png"
sizes="512x512"
href="/images/favicon-512x512.png"
/>
<link
rel="apple-touch-icon"
sizes="180x180"
href="/images/apple-touch-icon.png"
/>
<link rel="icon" href="/favicon.ico" sizes="32x32" />
</head>
<body class="antialiased bg-gray-900">
<!-- Navigation -->
{{> navbar }}
<!-- Hero Section -->
<section class="container mx-auto px-4 py-12 md:py-16">
<div class="max-w-4xl mx-auto text-center">
<h1 class="text-3xl md:text-5xl font-bold text-white mb-6">
PDF Security Tools - Protect & Secure Your PDFs Free
</h1>
<p class="text-lg md:text-xl text-gray-300 mb-8">
Protect and secure your PDF documents with BentoPDF's comprehensive
security tools. Encrypt with passwords, add digital signatures, manage
permissions, remove sensitive data, and more. All security operations
happen locally in your browser for maximum privacy. No cloud uploads,
no data retention - your documents stay completely confidential.
</p>
</div>
</section>
<!-- Tools Grid Section -->
<section class="container mx-auto px-4 py-8">
<h2 class="text-2xl md:text-3xl font-bold text-white mb-6 text-center">
All PDF Security Tools
</h2>
<div
class="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 xl:grid-cols-5 gap-4"
>
<a href="/protect-pdf" class="tool-card">
<i class="ph ph-lock text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">Encrypt PDF</h3>
<p class="text-gray-400 text-sm">Add password</p>
</a>
<a href="/unlock-pdf" class="tool-card">
<i class="ph ph-lock-open text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">Decrypt PDF</h3>
<p class="text-gray-400 text-sm">Remove password</p>
</a>
<a href="/sign-pdf" class="tool-card">
<i class="ph ph-pen-nib text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">Sign PDF</h3>
<p class="text-gray-400 text-sm">Digital signature</p>
</a>
<a href="/remove-restrictions" class="tool-card">
<i class="ph ph-link-break text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">Remove Restrictions</h3>
<p class="text-gray-400 text-sm">Unlock editing</p>
</a>
<a href="/change-permissions" class="tool-card">
<i class="ph ph-shield-check text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">Change Permissions</h3>
<p class="text-gray-400 text-sm">Set permissions</p>
</a>
<a href="/sanitize-pdf" class="tool-card">
<i class="ph ph-broom text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">Sanitize PDF</h3>
<p class="text-gray-400 text-sm">Remove metadata</p>
</a>
<a href="/flatten-pdf" class="tool-card">
<i class="ph ph-stack text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">Flatten PDF</h3>
<p class="text-gray-400 text-sm">Merge layers</p>
</a>
<a href="/linearize-pdf" class="tool-card">
<i class="ph ph-gauge text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">Linearize PDF</h3>
<p class="text-gray-400 text-sm">Optimize for web</p>
</a>
<a href="/remove-metadata" class="tool-card">
<i class="ph ph-file-x text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">Remove Metadata</h3>
<p class="text-gray-400 text-sm">Clean properties</p>
</a>
<a href="/pdf-layers" class="tool-card">
<i class="ph ph-stack-simple text-4xl text-indigo-400 mb-2"></i>
<h3 class="font-semibold text-white">PDF Layers</h3>
<p class="text-gray-400 text-sm">Manage layers</p>
</a>
</div>
</section>
<!-- Why Choose Section -->
<section class="container mx-auto px-4 py-12">
<div class="max-w-4xl mx-auto">
<h2 class="text-2xl md:text-3xl font-bold text-white mb-8 text-center">
Why Use BentoPDF PDF Security Tools?
</h2>
<div class="grid md:grid-cols-2 gap-6">
<div class="bg-gray-800 p-6 rounded-lg border border-gray-700">
<i class="ph ph-shield-check text-5xl text-indigo-400 mb-4"></i>
<h3 class="text-xl font-semibold text-white mb-2">
100% Privacy-First
</h3>
<p class="text-gray-400">
All operations happen in your browser. Your files never leave your
device, never uploaded to servers. Complete privacy guaranteed.
</p>
</div>
<div class="bg-gray-800 p-6 rounded-lg border border-gray-700">
<i class="ph ph-infinity text-5xl text-purple-400 mb-4"></i>
<h3 class="text-xl font-semibold text-white mb-2">
Unlimited & Free
</h3>
<p class="text-gray-400">
Use all tools as many times as you want, with files of any size.
No file limits, no tool limits. Completely free forever.
</p>
</div>
<div class="bg-gray-800 p-6 rounded-lg border border-gray-700">
<i class="ph ph-lightning text-5xl text-yellow-400 mb-4"></i>
<h3 class="text-xl font-semibold text-white mb-2">
Lightning Fast
</h3>
<p class="text-gray-400">
Browser-based processing means instant results. No waiting for
uploads or downloads. Works offline after page load.
</p>
</div>
<div class="bg-gray-800 p-6 rounded-lg border border-gray-700">
<i class="ph ph-user-minus text-5xl text-red-400 mb-4"></i>
<h3 class="text-xl font-semibold text-white mb-2">
No Signup Required
</h3>
<p class="text-gray-400">
Start using tools immediately. No account creation, no email, no
personal information needed. Just open and use.
</p>
</div>
</div>
</div>
</section>
<!-- FAQ Section -->
<section class="container mx-auto px-4 py-12">
<div class="max-w-4xl mx-auto">
<h2 class="text-2xl md:text-3xl font-bold text-white mb-6 text-center">
Frequently Asked Questions
</h2>
<div class="faq-list">
<details class="faq-d">
<summary class="faq-d-q">
What's the difference between protecting a PDF with a password and
restricting its permissions?
<i data-lucide="plus" class="faq-d-icon"></i>
</summary>
<p class="faq-d-a">
A user password, set with
<a
href="/protect-pdf"
class="text-indigo-300 hover:text-indigo-400"
>Protect PDF</a
>, is required to open the file at all. Permissions are flags
stored inside the encryption that control what a reader can do
after opening, such as printing, copying, editing, annotating, or
filling forms, and they only take effect when an owner password is
set. Change Permissions lets you allow or deny each action
individually, while Protect PDF applies the strictest set as soon
as you add an owner password.
</p>
</details>
<details class="faq-d">
<summary class="faq-d-q">
How strong is the password protection?
<i data-lucide="plus" class="faq-d-icon"></i>
</summary>
<p class="faq-d-a">
Protect PDF and Change Permissions use 256-bit AES encryption, the
PDF 2.0 standard, applied by QPDF running in your browser. The
encryption itself isn't practical to brute-force, so the weak
point is the password: use a long passphrase and send it through a
different channel than the file. Permission flags are a separate
matter, since they rely on the reader honoring them and some
third-party tools ignore them.
</p>
</details>
<details class="faq-d">
<summary class="faq-d-q">
Can I remove a password from a PDF if I don't know it?
<i data-lucide="plus" class="faq-d-icon"></i>
</summary>
<p class="faq-d-a">
No.
<a
href="/unlock-pdf"
class="text-indigo-300 hover:text-indigo-400"
>Unlock PDF</a
>
needs the password and then saves a copy with no encryption or
restrictions left, and none of the tools crack or brute-force
passwords. For a file that opens fine but blocks printing or
copying, use Remove Restrictions instead, which asks for the owner
password if the file has one.
</p>
</details>
<details class="faq-d">
<summary class="faq-d-q">
What's the difference between Sign PDF and a digital signature?
<i data-lucide="plus" class="faq-d-icon"></i>
</summary>
<p class="faq-d-a">
Sign PDF places a drawn, typed, or uploaded signature image on the
page, with an option to flatten it so nobody can move or delete it
later.
<a
href="/digital-sign-pdf"
class="text-indigo-300 hover:text-indigo-400"
>Digital Signature</a
>
applies a cryptographic signature with your own X.509 certificate
(.pfx, .p12, or .pem), which proves who signed and that the file
hasn't changed since, and Validate Signature checks signatures
already in a file. Certificate signing may need an internet
connection to fetch the certificate chain, and self-signed
certificates will show warnings in Adobe Reader.
</p>
</details>
<details class="faq-d">
<summary class="faq-d-q">
How do I redact text so it's actually gone?
<i data-lucide="plus" class="faq-d-icon"></i>
</summary>
<p class="faq-d-a">
Use the redaction tool in the
<a href="/edit-pdf" class="text-indigo-300 hover:text-indigo-400"
>PDF Editor</a
>, which permanently removes the marked content from the page
instead of just covering it with a box. Redaction only deals with
what's on the page, so if the file's properties, comments, or
attachments could reveal the same information, run Remove Metadata
or Sanitize PDF on the result as well.
</p>
</details>
<details class="faq-d">
<summary class="faq-d-q">
What's the difference between Remove Metadata and Sanitize PDF?
<i data-lucide="plus" class="faq-d-icon"></i>
</summary>
<p class="faq-d-a">
<a
href="/remove-metadata"
class="text-indigo-300 hover:text-indigo-400"
>Remove Metadata</a
>
strips only the document properties: title, author, dates,
producer, XMP data, document IDs, and application-specific data,
and it leaves pages, forms, links, and bookmarks untouched.
Sanitize PDF goes further and can also flatten forms and delete
annotations, embedded JavaScript, attachments, layers, links, and
structure tags, with each item selectable. Both are irreversible,
so keep your original file.
</p>
</details>
<details class="faq-d">
<summary class="faq-d-q">
What does flattening a PDF do, and when should I use it?
<i data-lucide="plus" class="faq-d-icon"></i>
</summary>
<p class="faq-d-a">
<a
href="/flatten-pdf"
class="text-indigo-300 hover:text-indigo-400"
>Flatten PDF</a
>
burns form fields and annotations (comments, highlights, stamps,
sticky notes, signature fields) into the page content, so they
look the same but can no longer be edited, moved, or removed. Use
it after a form is filled in or a signature is placed and before
you send the file, because there's no way to unflatten. Text stays
selectable and searchable, and bookmarks are kept.
</p>
</details>
<details class="faq-d">
<summary class="faq-d-q">
Are my passwords, certificates, or files sent to a server?
<i data-lucide="plus" class="faq-d-icon"></i>
</summary>
<p class="faq-d-a">
No. Encrypting, unlocking, sanitizing, and signing all run as
WebAssembly in your browser, so the document, the password you
type, and your certificate's private key stay on your device. The
one network exception is Digital Signature, which may contact your
certificate authority's servers to fetch the certificate chain;
the document itself is still never sent.
</p>
</details>
</div>
</div>
</section>
<!-- Footer -->
{{> footer }}
<script type="module" src="/src/js/utils/lucide-init.ts"></script>
<script type="module" src="/src/js/mobileMenu.ts"></script>
<script type="module" src="/src/js/main.ts"></script>
<!-- Fix BASE_URL for subdirectory deployment -->
<script type="module">
const BASE_URL = import.meta.env.BASE_URL;
// Update all links that have literal / placeholder
document.querySelectorAll('a[href*="$"]').forEach((link) => {
if (link.href.includes('/')) {
const newHref = link
.getAttribute('href')
.replace(/${BASE_URL}/g, BASE_URL);
link.setAttribute('href', newHref);
}
});
// Update all src attributes
document.querySelectorAll('[src*="$"]').forEach((elem) => {
if (elem.src.includes('/')) {
const newSrc = elem
.getAttribute('src')
.replace(/${BASE_URL}/g, BASE_URL);
elem.setAttribute('src', newSrc);
}
});
</script>
<!-- JSON-LD CollectionPage Schema -->
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "CollectionPage",
"name": "PDF Security Tools",
"description": "Encrypt, decrypt, sign, and secure your PDFs with free online security tools. Password protection, digital signatures, permissions management. Privacy-first security in your browser.",
"url": "https://www.bentopdf.com/pdf-security",
"breadcrumb": {
"@type": "BreadcrumbList",
"itemListElement": [
{
"@type": "ListItem",
"position": 1,
"name": "Home",
"item": "https://www.bentopdf.com"
},
{
"@type": "ListItem",
"position": 2,
"name": "PDF Security",
"item": "https://www.bentopdf.com/pdf-security"
}
]
}
}
</script>
</body>
</html>