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PDF 解锁
直接在浏览器中移除 PDF 密码保护
将受密码保护的 PDF 拖拽到此处，或点击选择文件
最大文件大小：128 MB
所有处理均在浏览器本地完成，文件和密码都不会上传到服务器。
解锁密码保护的 PDF — 免费去除打开密码
Already know the PDF password and just want to strip it off so you can open the file anywhere without typing it? Our browser-side AES decrypt removes the open password in seconds — no upload, no account, no quality loss. Perfect for HR packets, shared client deliverables, and any document you'll keep open in your usual reader.
100% FreeNo UploadNo Sign-upAES-256 Local Decryption
使用步骤
- Drop Password-Protected PDF: Drag your locked PDF into the drop zone. The file never leaves your device — only your browser sees its bytes.
- Enter the Password: Type the open password you already know. Our tool uses pdf-lib + wasm-pdf AES decryption locally. The password is held in memory only, never sent anywhere.
- Unlock: Click 'Unlock PDF'. The decryption runs in your browser via WebAssembly. Most PDFs unlock in under 2 seconds for files under 50 MB.
- Download Unlocked PDF: Save the unlocked PDF. It opens without prompting a password in any reader. Original layout, fonts, images, and metadata stay intact.
为什么选择此工具
- 100% Local Processing: Files are processed entirely in your browser using JavaScript — never uploaded to any server.
- No Limits: No file count or file size restrictions. Process as many files as your device can handle.
- No Sign-up: Free forever, no account needed, no email required. Open the page and start.
- Private by Design: Nothing is sent to any server. Close the tab and your files are gone forever.
常见问题
How do I unlock a password-protected PDF?
If you already know the password, our Unlock tool removes the open password using browser-side AES decryption in under 2 seconds for typical files. The unlocked file opens without prompting a password anywhere — readers, browsers, mobile devices. Your file never leaves your device.
Is there a free PDF password remover?
Yes — our Unlock tool is free, no sign-up, no upload, no watermark. The decryption runs entirely in your browser using pdf-lib + wasm-pdf. We support standard PDF password encryption (40-bit RC4, 128-bit RC4, 128-bit AES, 256-bit AES).
Will unlocking a PDF change its content?
No. The tool removes the password protection layer only. All pages, fonts, images, form fields, and annotations are preserved byte-for-byte. The only difference is that the file no longer requires a password to open.
Can I unlock a PDF without knowing the password?
Our tool requires you to enter the password you already know. We do not crack, brute-force, or recover lost passwords — that would be unethical and illegal in most jurisdictions. If you've forgotten the password, try common variations, check your password manager, or contact whoever sent you the file.
Does PDF unlocking remove DRM?
We only remove the standard PDF open password (user password), which is a viewer-level protection that anyone with the password can remove. We do not strip publisher-level DRM, owner permissions, or third-party DRM systems. If a PDF enforces edit/print restrictions, our tool removes those too (the 'owner password' is enforced by readers, not by the file itself).
Is my password safe?
Yes. The password is held in browser memory only, used to derive the AES key, then discarded. Nothing is uploaded, logged, or sent to any server. After the unlock completes, refreshing the page clears all state.
Can I unlock multiple PDFs at once?
Yes — drop several files and enter the password for each. Our batch mode processes them sequentially and produces a single ZIP download. All files must use the same password for batch unlock.