PDF900

PDF 잠금 해제

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잠금 해제 시 페이지가 로컬에서 다시 렌더링되어 암호화되지 않은 새 PDF가 생성됩니다.

배치당 최대 50 MB

Free online Unlock PDF — fast, secure, and quality-focused. PDF900 makes document work simple.

  • 100% free, no signup
  • Privacy-first design
  • Works in your browser

Everything you need from Unlock PDF

Unlock PDF helps you control who can open, sign, or share your PDF — essential for contracts and sensitive files.

Passwords, signatures, and access control reduce the risk of documents being opened by the wrong people. Unlock PDF makes those protections straightforward.

When encryption runs locally, your password and file contents never travel to PDF900 servers.

Why use this tool

Strong protection

Unlock PDF uses industry-standard PDF security features where supported.

Simple setup

Add a password or signature in a few clicks — no complex settings.

You stay in control

You choose the password and who receives it — we don't store your secrets.

How to use Unlock PDF

  1. 1

    Upload the PDF you want to secure with Unlock PDF.

  2. 2

    Enter a password, draw a signature, or configure access options.

  3. 3

    Process the file — encryption often runs locally in your browser.

  4. 4

    Download the protected PDF and share the password separately if needed.

Everything included

  • Contract-ready

    Pair with Contract Pack workflow for end-to-end sending.

  • Local encryption

    Protect PDF runs AES encryption in your browser.

  • Free & private

    Unlock PDF is free with privacy-first architecture.

  • HTTPS only

    All traffic to PDF900 uses secure connections.

자주 묻는 질문

Is Unlock PDF safe to use?
Yes. Local tools keep files on your device; server tools delete uploads within one hour.
Can PDF900 see my password?
No — local encryption means we never receive your password.
Is Unlock PDF free?
Yes, PDF900 security tools are free to use.

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