How is this different from other online PDF tools?

Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.

Are my PDF files uploaded?

No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.

Can I verify that files are not uploaded?

Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.

Does this tool work offline?

Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.

What happens when I refresh the page?

Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.

Does this tool store my files?

No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.

What technologies does this tool use?

This tool uses MuPDF, a PDF engine compiled to WebAssembly, running entirely in your browser to authenticate and decrypt the document — your files never leave your browser.

Does this tool use WebAssembly?

Yes — this tool does. MuPDF is C compiled to WebAssembly and runs inside your browser; the .wasm binary is served from this site and neither the file nor the password is sent anywhere.

Can this tool unlock password-protected PDFs?

Yes — that is exactly what it does, provided you know the current password. The decryption happens entirely in your browser.

Can this open a PDF whose password I forgot?

No. It removes the password from a document you can already open with its correct password. Cracking unknown passwords is not possible with AES-encrypted PDFs and is not something this tool attempts.

How do I remove a password from my PDF here?

Choose the protected PDF from your device, type its current password in the password field, then press the remove-password button. The decryption runs in your browser, and a password-free copy named unlocked.pdf is offered for you to save.

Why does it say wrong password when I know the file opens?

Decryption authenticates against the document's actual password, so a stray leading or trailing space, the wrong letter case, or a different keyboard layout can all cause a rejection even when the file looks familiar. Retype the password carefully, watching for capital letters and spaces, and try again.

Why is there a wait the first time I unlock a file?

The MuPDF engine that does the decryption is about 10 MB and loads on first use, which is the brief loading-engine phase you see. Your browser caches it afterward, so later files in the same session skip that step and go straight to decrypting.

Does the Unlock PDF tool cost anything to use?

Unlocking a password-protected PDF here is completely free — no account, no sign-up, and no limit on how many files you decrypt, and it always will be. What makes this tool worth knowing about is that your file and the password you type never leave your device: decryption runs locally in your browser using a WebAssembly build of MuPDF, so there is no server to send sensitive data to in the first place.

Remove a PDF Password Privately — Decrypt in Your Browser

Select the protected PDF and enter its current password; the document is decrypted locally by MuPDF (compiled to WebAssembly) and a password-free copy downloads from your browser.

Quick answer

What it does: Select the protected PDF and enter its current password; the document is decrypted locally by MuPDF (compiled to WebAssembly) and a password-free copy downloads from your browser.
Free?: Yes — 100% free, no account or sign-up.
Files uploaded?: No — everything is processed in your browser.
Works offline?: Yes — once the page has loaded.
Best for: A user removes the password from a PDF they protected months ago so they can now merge, split, or edit it.
Good to know: You must know the current password — this tool removes a password you can already use; it does not crack or bypass unknown passwords.

How it works

Select the password-protected PDF from your device.
The file is read into browser memory — no data leaves your browser.
Enter the document's current password (it is never transmitted anywhere).
MuPDF — compiled to WebAssembly and served from this site — verifies the password and saves a decrypted copy.
The unlocked PDF is offered as a download; it opens without a password from now on.

When to use this tool

A user removes the password from a PDF they protected months ago so they can now merge, split, or edit it.
An employee strips the open password from a company-issued PDF they are authorised to access, to annotate a personal copy.
A freelancer removes a client-supplied password from an approved contract before archiving it in a document system.
This tool requires you to supply the correct current password — it does not crack, guess, or bypass unknown passwords.

Frequently asked questions

How is this different from other online PDF tools?: Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.
Are my PDF files uploaded?: No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.
Can I verify that files are not uploaded?: Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.
Does this tool work offline?: Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.
What happens when I refresh the page?: Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.
Does this tool store my files?: No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.
What technologies does this tool use?: This tool uses MuPDF, a PDF engine compiled to WebAssembly, running entirely in your browser to authenticate and decrypt the document — your files never leave your browser.
Does this tool use WebAssembly?: Yes — this tool does. MuPDF is C compiled to WebAssembly and runs inside your browser; the .wasm binary is served from this site and neither the file nor the password is sent anywhere.
Can this tool unlock password-protected PDFs?: Yes — that is exactly what it does, provided you know the current password. The decryption happens entirely in your browser.
Can this open a PDF whose password I forgot?: No. It removes the password from a document you can already open with its correct password. Cracking unknown passwords is not possible with AES-encrypted PDFs and is not something this tool attempts.
How do I remove a password from my PDF here?: Choose the protected PDF from your device, type its current password in the password field, then press the remove-password button. The decryption runs in your browser, and a password-free copy named unlocked.pdf is offered for you to save.
Why does it say wrong password when I know the file opens?: Decryption authenticates against the document's actual password, so a stray leading or trailing space, the wrong letter case, or a different keyboard layout can all cause a rejection even when the file looks familiar. Retype the password carefully, watching for capital letters and spaces, and try again.
Why is there a wait the first time I unlock a file?: The MuPDF engine that does the decryption is about 10 MB and loads on first use, which is the brief loading-engine phase you see. Your browser caches it afterward, so later files in the same session skip that step and go straight to decrypting.
Does the Unlock PDF tool cost anything to use?: Unlocking a password-protected PDF here is completely free — no account, no sign-up, and no limit on how many files you decrypt, and it always will be. What makes this tool worth knowing about is that your file and the password you type never leave your device: decryption runs locally in your browser using a WebAssembly build of MuPDF, so there is no server to send sensitive data to in the first place.