Unlock & Decrypt PDF Online: Remove Password Protection
PDF unlock online: remove the open password or lift print and edit restrictions. Supports AES-256, AES-128, and RC4, and keeps every page and link intact.
Updated 2026-08-16
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Features
- Unlock password-protected PDFs: enter the password and save a decrypted copy in seconds
- Decrypts AES-256 (revision 5/6, the default of modern Acrobat), AES-128, and RC4: all verified locally on your device
- Lift permission-only restrictions: files that open without a password but block printing or editing are unlocked instantly, no password needed
- Clear wrong-password feedback with unlimited retries: check caps lock, stray spaces, or a 32-character truncated password
- Detects files that are already open and offers a one-click as-is copy, without rewriting anything
- The decrypted copy keeps every page, image, font, link, and bookmark exactly as they are
- Works on a phone: open the PDF from the Files app or downloads and unlock it on the go
- Output is named like report-unlocked.pdf, so you always know which copy is decrypted
How to Use
- 1Drag the locked PDF onto the tool or click the drop area.
- 2The tool reads the file locally and tells you whether it is password-protected or only carries restrictions.
- 3If the file opens without a password but blocks printing or editing, tap Unlock restrictions; no password needed.
- 4If a password is required, type it into the password field.
- 5Press Unlock PDF: the password is verified on your device, not on a server.
- 6On a wrong-password error, check caps lock and leading or trailing spaces, and try a version truncated to 32 characters.
- 7When unlocking succeeds, save the decrypted copy: it is named like report-unlocked.pdf.
- 8On a phone, pick the file from the Files app or downloads folder; the flow is identical.
- 9If the tool reports an unsupported scheme, ask the sender for a copy protected with standard AES-256, AES-128, or RC4.
- 10After unlocking, re-encrypt the file with the PDF encrypt tool if you still need to control who opens it.
Frequently Asked Questions
How do I unlock a PDF?
Open the locked PDF in this tool, enter the password used to protect it, and press Unlock PDF. The password is verified in your browser, and the tool writes a new copy with no encryption (named like report-unlocked.pdf) that opens without any password prompt.
Can I remove a PDF password without knowing it?
No, that is exactly what encryption prevents. Without the password, the content cannot be read by this tool or any other. What you can do: ask the sender to re-protect the file or send an unprotected copy, or get the password from them and keep it in a password manager.
My PDF opens without a password, but printing is disabled. Why does the tool say it is locked?
That file carries permission restrictions, not an open password: it opens freely but blocks actions like printing or editing. This tool detects that state and removes the restrictions with one click; no password required.
Can I decrypt an AES-256 encrypted PDF?
Yes. AES-256 (PDF security handler revision 5/6), the default of modern Acrobat, is fully supported, along with AES-128 and RC4. Open the file, enter the password, and save the decrypted copy.
Can I unlock a PDF on my phone?
Yes. The tool works in any modern mobile browser: pick the PDF from the Files app or your downloads, enter the password, and save the unlocked copy. Everything is processed on your phone; nothing is uploaded.
I entered the right password, but the tool says it is wrong. What now?
Passwords are case-sensitive. Check caps lock, leading or trailing spaces, and whether you used a different keyboard layout. Some tools truncate passwords to 32 characters; if yours is longer, try the first 32. There is no limit on retries.
I lost the PDF password. Can this tool recover or crack it?
No, and that is the point of encryption. There is no backdoor: without the password the file cannot be decrypted, and guessing is not feasible for a strong password (a random 12-character password has roughly 2^72 combinations, centuries even on dedicated GPU rigs). Your realistic options: ask the sender for the password or an unprotected copy, check your password manager for the entry, and keep the recovered password there. If the file was protected by the owner to stop reading, no tool can bypass that.
Why does the tool say the encryption scheme is unsupported?
PDF encryption is defined by security handler revisions: this tool supports the mainstream ones: AES-256 (revision 5/6, modern Acrobat's default), AES-128, and RC4. Files protected with older or exotic handlers (e.g. revision 2/3 with unusual settings, or custom third-party encryption) fall outside that set. In that case, ask the sender to re-protect the file with standard AES-256; most PDF apps can do this in two clicks.
Can I decrypt a PDF online for free?
Yes. Decryption happens entirely in your browser: you only need the password the file was protected with, which is the point of encryption.
Does unlocking change the content of my PDF?
No. The decrypted copy contains the exact same pages, images, fonts, links, and bookmarks as the protected original; only the encryption is removed.
What is the difference between an open password and permission restrictions?
An open password (user password) blocks opening the file at all. Permission restrictions (the P flags, e.g. block printing or editing) apply to files that open without a password. This tool removes both: the first needs the password, the second does not.
Will the decrypted PDF work everywhere?
Yes. The unlocked file is a standard, unencrypted PDF that opens in every reader (Adobe Acrobat, browsers, Preview, and mobile apps) with no password prompt.