Do you crack PDF passwords?

No. You must type the correct open (user) password. There is no wordlist, GPU attack, or “forgot password” recovery. If you do not know the password, this page cannot help.

Is the file uploaded?

No. Decrypt-and-save runs in this tab with a client-side PDF library.

User password vs owner (permissions) password?

This tool targets the **open** password that stops you from viewing the file. Owner-only restriction files (print/copy flags without an open password) may already open; use a PDF editor for permission flags if the document is not encrypted for opening.

The Sample file uses the password `sample` so you can try the flow without a real confidential PDF.

Utill.net

解除 PDF 密码

浏览器处理

在您知道打开密码时移除密码或权限限制。不会破解未知密码。

解锁仅在浏览器中进行。必须知道密码——不会破解未知密码，也不会上传。

拖放 PDF，或在下方选择

浏览文件

PDF 密码

您已经知道的打开（用户）密码。本工具不会猜测或破解密码。

原始—
结果—

这个工具是什么？

An honest PDF unlocker: it decrypts a file only when you supply the correct open password, then saves a copy without encryption. Everything stays in the browser.

It is not a cracking service, not Adobe Acrobat, and not a way to bypass someone else’s documents.

常见用途

You passworded a scan last year and still remember the phrase, but a website rejects encrypted uploads
A colleague sent a locked PDF and also sent the password in another channel
You want an unencrypted copy on disk after opening the file locally

如何使用

Drop the encrypted PDF.
Enter the password you already know (Sample uses sample).
Download PDF. If the password is wrong, you get an error — not a guessed file.

示例

Input	Notes
Sample locked PDF, password `sample`	Demonstrates success; output opens without a prompt.
Correct user password on a real file	Unencrypted copy; keep it as carefully as the original secret.
Wrong password	Error; no partial dump.
Unencrypted PDF	Message that the file is not password-protected.

实践中的常见误区

Not a cracker: missing passwords stay missing. There is no “try common passwords” mode on purpose.
Some AES/revision combinations may fail in the library even with the right password; that is a decoder limit.
Unique gotcha: saving an unlocked copy does not revoke the original encrypted file. Anyone with the old file and password can still open it.

参考资料

最后审阅: 2026-08-30

常见问题

Do you crack PDF passwords?: No. You must type the correct open (user) password. There is no wordlist, GPU attack, or “forgot password” recovery. If you do not know the password, this page cannot help.
Is the file uploaded?: No. Decrypt-and-save runs in this tab with a client-side PDF library.
User password vs owner (permissions) password?: This tool targets the **open** password that stops you from viewing the file. Owner-only restriction files (print/copy flags without an open password) may already open; use a PDF editor for permission flags if the document is not encrypted for opening.
Sample password?: The Sample file uses the password `sample` so you can try the flow without a real confidential PDF.