Secure your PDF documents for free with military-grade encryption. No signup required, no file size limits.
Part of our Password Protect PDF Free suite
Secure your PDF documents for free with AES-256 encryption — the same standard used by banks, governments, and military organizations. No signup required, no file size limits, no watermarks. Just upload your PDF, set a password, configure permissions, and download your protected file. Everything happens locally in your browser using the Web Crypto API. Most online PDF encryption services either charge subscription fees, impose file size limits, or require you to upload your sensitive documents to their servers. This tool eliminates all of those problems. Your PDF never leaves your device, so there's zero risk of server-side data breaches. You get unlimited free usage with the strongest available encryption standard, and you keep complete control over your documents at all times.
Select or drag and drop the PDF file you want to protect with a password.
Choose a strong password and configure what actions are allowed — printing, copying, modifying, annotating, and filling forms.
Get your password-protected PDF instantly. Everything runs in your browser — no server uploads.
Protect personal documents like tax returns, ID scans, and certificates stored in cloud drives. Even if someone gains access to your cloud account, encrypted PDFs remain unreadable.
Secure business plans, pitch decks, and financial projections before sharing with potential investors, advisors, or partners.
Protect academic work, research papers, and exam materials from unauthorized distribution or plagiarism.
Secure client deliverables with passwords before sending, ensuring only the paying client can access the final work.
Store your PDF passwords in a password manager like Bitwarden or 1Password. Never rely on memory alone for important documents — a forgotten password means permanent loss of access.
AES-256 encrypted PDFs work with all modern PDF readers. Very old software from before 2008 may not support this encryption level, but this is extremely rare today.
Always encrypt sensitive PDFs before uploading them to Google Drive, Dropbox, or OneDrive. This adds a protection layer independent of the cloud provider's security.
All processing happens locally in your browser. Your files never leave your device.
No uploads, no waiting for servers. Instant processing powered by your device.
No limits, no watermarks, no registration required. Free forever.
Encrypt PDF files online with AES-256 encryption. No file uploads to servers. Set passwords and restrict permissions in your browser.
Lock your PDF files with a password so only authorized people can open them. Free, private, and runs entirely in your browser.
Professional PDF encryption tool with AES-256 security. Set user and owner passwords, configure permissions. Browser-based and free.
Add a password to any PDF file in seconds. Free browser-based tool with AES-256 encryption. No server uploads.
Professional online PDF password protection with AES-256 encryption. Set user and owner passwords, configure permissions. 100% private.
Password-protect PDFs without Adobe Acrobat Pro. Same AES-256 encryption, free, no installation. Works in your browser.
Merge PDF files online for free. Combine multiple PDFs into one document instantly in your browser. No upload required, 100% private.
Merge photos into a single PDF file. Convert and combine JPG, PNG images into one PDF document online.
Split PDF files into separate pages or documents. Extract specific pages from any PDF online for free.
Free alternative to Adobe compress PDF. Reduce PDF file size online without losing quality.
PDF to JPG converter online. Convert PDF pages to high-quality JPG images for free.
Rotate PDF pages to any angle. Turn pages 90, 180, or 270 degrees online for free.
Convert PNG to JPG online for free. Fast, high-quality conversion with adjustable compression.
qrFree QR code generator. Create custom QR codes with colors, logos, and styles online.
textConvert text to sentence case. Automatically capitalize the first letter of each sentence.
convertConvert HTML to PDF online for free. Paste HTML code and generate downloadable PDF instantly.