What PDF Protect helps you do

Add a password to a PDF so it cannot be opened without it. The tool encrypts the document in the browser and uses the same value for the user and owner passwords. It is a basic confidentiality measure for files that will be emailed or stored on a shared drive.

Encryption is applied in your browser. Your file and password are not sent to Haivix.

How it works

A PDF stores positioned drawing instructions rather than flowing paragraphs, which is why editing one is different from editing a document. Page content, fonts, images and annotations are separate objects, and a page only carries a text layer if the producer wrote one. Most tools here rebuild or render the file in your browser with pdf-lib and pdf.js; the formats that need a full office engine, such as Word, Excel, PowerPoint, PDF/A and HTML, use the Haivix service and say so in their privacy note. Every tool writes a new file and leaves the original untouched. Because content is placed by coordinates, extraction often returns text runs in visual order rather than sentences, and columns or tables can arrive interleaved.

How to use PDF Protect

Load the PDF and enter the password twice.
Apply the protection and wait for the encrypted file.
Download the protected PDF.
Share the password with the recipient through a separate channel.

When to use it

Protect a statement, invoice or ID document before emailing it.
Add a password to an archive copy for storage.
Prevent casual opening of a document on a shared drive.
Send a document to a recipient who expects a password.
Add a basic barrier before a file leaves your control.
Protect a draft that is not ready for wide distribution.

When not to use it

Do not use it as a substitute for secure file transfer.
Do not expect it to stop a determined attacker with the password.
Do not protect a file you cannot afford to lose the password for.

Example

After applying a password, opening the exported PDF prompts for it before any page is shown. The password must be at least four characters, and both fields must match. Because the same value is used for the user and owner roles, there is no separate permissions password.

What you can do with PDF Protect

Encrypt a PDF with a password.
Require the password to open the file.
Check that both password fields match.
Enforce a minimum password length.
Download the protected PDF.
Run the encryption locally in the browser.

Example: work on a copy and check the output

Keep the original file. These tools produce a download rather than editing in place, so a failed operation never damages the source.

Check whether the PDF has a real text layer before relying on extraction. A scan is an image, so text tools return little or nothing until OCR has run.

Unlock encrypted files first. A password-protected PDF cannot be reordered, cropped or annotated until it has been opened with the correct password.

Review the output before sending it on. Fonts can substitute, overlays do not always remove what is underneath, and page boxes can shift content near the edges.

Note the page size and orientation before laying anything out. A mixed document can contain portrait and landscape pages, and a tool that assumes one size may crop or offset the others.

Keep a note of the operation and its settings. If a recipient questions the result, reproducing it from the original is faster than guessing which options were used.

What to know before you start

Provide the password separately, since a lost password cannot be recovered from the file.
Basic password protection deters casual access but is not the same as strong encryption against every attack.
Only an open password is set; printing and copying permissions are not configured separately.
The strength of the protection depends on the password you choose.

Common mistakes

Sending the password in the same email as the file.
Choosing a short or reused password.
Assuming the output blocks printing or copying; only opening is controlled.
Forgetting the password and locking yourself out.

Troubleshooting

If the tool rejects the password, check the minimum length and the confirmation field.

If the file still opens without a prompt, the viewer may be using a cached copy.

If the recipient cannot open it, confirm the password was transmitted correctly.

If the source is already encrypted, unlock it before protecting it again.

PDF Protect