Works locally — files never leave your browser

Password protect a PDF

Set an open password on your PDF so only people who know it can read the file. The password is applied right in your browser — the document never touches a server.

Drop your PDF here — it opens instantly or click to choose a file · free to edit · $1 only when you download
Free to edit
No sign-up
No upload

You can password protect a PDF free in your browser with DollarFix PDF: open the file, set an open password, and every standard viewer will ask for it before showing a page. The file is never uploaded, and you pay $1 once only to download the protected copy.

Last updated: August 2026

Some PDFs are not meant for everyone — a contract with salary figures, a medical report, a scan of your passport. The usual way to protect one online is oddly self-defeating: you upload the confidential file to a stranger's server so it can be made confidential. DollarFix PDF skips that step entirely. The password is applied inside your browser, on your machine, and the document never travels anywhere in the process.

What you get is standard PDF password protection — the kind every mainstream viewer understands. Once the password is set, Adobe Acrobat, Apple Preview, Chrome, Edge and the PDF apps on phones will all refuse to show a single page until it is entered. We keep the description honest: this is the classic open-password scheme built into the PDF format (RC4-128), which reliably keeps the file closed to anyone you have not given the password. We do not dress it up as military-grade encryption, because it is not.

Because this is a full editor rather than a single-purpose locker, you can finish the document before you seal it. Fix a typo, whiteout an account number, drop in a signature, delete a page — then set the password and save everything in one pass. All of that work is free; the only charge is a one-time $1 when you download the protected copy. No account, no subscription, and no limit on how many files you protect or how large they are.

Two practical notes. Share the password through a different channel than the file itself — a locked PDF emailed together with its password protects nothing. And keep the password somewhere safe: there is no recovery backdoor, here or in any honest tool. If you later decide the protection has done its job, open the file with the password and save a clean copy — the unlock tool in this same editor does exactly that.

How to password protect a PDF

1
Open your PDF
Drop the file into the editor — it opens directly in your browser with no upload and no account to create.
2
Finish any edits first
Optional but handy: fix text, whiteout private details or add a signature before you lock the file down.
3
Set the password
Choose the protect option and type the password readers will need. It is applied on your device using the standard PDF open-password scheme every viewer supports.
4
Download the protected copy
Pay $1 once and save the file. From now on Acrobat, Preview, Chrome and phone apps will all ask for the password before showing a page.
Open the editor now
No subscription
Others lock downloads behind $10–30/month plans. Here you pay $1 once, only when you export — nothing else.
Private by design
Your PDF is opened and edited inside your browser. It is never uploaded to a server — your file stays on your device.
Edits the real content
Change actual text, move and resize images, redact, sign and fill — not just sticky annotations on top. Full Unicode & Cyrillic.

Frequently asked questions

Is it free to password protect a PDF?
Setting the password and any editing you do first are free. The single charge is $1 when you download the protected file — no subscription and no account.
Is my file uploaded to a server to be encrypted?
No. The password is applied entirely inside your browser. The document never leaves your device at any point — which is rather the point when the content is sensitive.
How strong is the protection?
It uses AES-256 — the encryption defined by PDF 2.0 and the same standard Acrobat applies. It is opened by every current mainstream viewer (Acrobat X and later, Preview, Chrome, Edge and the usual phone apps). A legacy RC4-128 mode exists only for very old viewers that cannot read AES at all; it is not the default because RC4 is cryptographically broken.
What if I forget the password?
There is no recovery backdoor — not here and not in any honest tool. The editor can only remove a password when you can supply it, so store it somewhere safe.
Can I remove the password later?
Yes. Open the file, enter the password, and save a clean copy without it — the unlock tool in this same editor does exactly that.
Are there limits on size or number of files?
No. There are no daily quotas, no file-size caps and no page limits — protect one contract or a hundred, the terms are the same.
Will the protected PDF open on phones and in Preview?
Yes. Because it uses the password scheme built into the PDF standard, Acrobat, Apple Preview, Chrome, Edge and mobile PDF apps all show the normal password prompt and open the file once it is entered.

More PDF tools

Unlock PDF Redact PDF Sign PDF

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