Protect PDF — Add a Password
Add a password to a PDF so only the right people can open it — right in your browser. Your file never leaves your device, and there are no watermarks or sign-ups.
Drop PDF here or click to browse
PDF files only
Your file and password never leave your device
Nothing to delete later
Secure connection
Works in every modern browser
How it works
- 1
Add your PDF
Drop the PDF onto the page or click to browse and select it.
- 2
Set a password
Type the password that will be required to open the file.
- 3
Protect & download
Press Protect — the encrypted PDF is built in your browser and downloads instantly.
Why use this tool
Password protection
Encrypt the PDF so it can only be opened with the password you set.
Private by design
The file is encrypted locally in your browser and never uploaded to a server.
You keep the password
The password is set on your device — we never see it or store it.
No watermark
Protection adds security, not marks — your pages stay clean.
Free & unlimited
No account, no trial, no per-file charges — protect as many PDFs as you need.
Works on any device
Phone, tablet, or computer — it runs in the browser you already have.
What does protecting a PDF do?
Protecting a PDF encrypts it and attaches a password, so anyone who tries to open the file is asked for that password first. Without it, the document simply will not display — its contents stay scrambled. This is the standard way to keep a sensitive document safe when it has to be emailed, uploaded, or stored somewhere you do not fully control. Because this tool runs entirely in your browser, both the file and the password stay on your own device; nothing is uploaded, so the very thing you are trying to protect is never exposed in the process.
When should you protect a PDF?
Add a password whenever a PDF contains something you would not want a stranger to read. People protect bank statements and tax documents before emailing them, businesses lock contracts and internal reports, and anyone sending an ID scan or medical record adds a password as a basic safeguard. It is also wise before uploading a file to shared storage. Share the password through a separate channel — a text or a call rather than the same email — so the file and its key never travel together.
How to get the best results
Choose a strong password: long, unique, and not something guessable like a birthday. Because there is no way to recover a lost PDF password, store it somewhere safe, such as a password manager, before you send the file. Send the password to the recipient separately from the document. And keep an unprotected copy of the original in a secure place, so you are never locked out of your own file if the password is forgotten.
Limitations to be aware of
A password stops someone from opening the file, but it is only as strong as the password you choose — a weak password is easy to guess. There is no “forgot password” for a PDF, so a lost password means a lost document unless you kept an original. Protection secures the file at rest and in transit; once a trusted person opens it, they can read and, depending on the PDF, copy its contents. For most everyday privacy needs, though, an open-password is exactly the right level of protection.
Common mistakes and how to avoid them
The most serious mistake is sending the password in the same email as the file, which defeats the purpose — use a separate channel. Another is choosing a weak, memorable password; make it strong and store it in a manager. People also sometimes protect their only copy and then forget the password, locking themselves out — always keep a secure original. Finally, do not assume a protected PDF is safe to leave on a public computer; the protection is for the file, not for a device someone else can access.
Using it on mobile and desktop
On a computer, drag a sensitive PDF onto the page, set a password, and download the protected version ready to email — all without the file ever leaving your machine. On a phone, protect a document before sharing it in chat or uploading it to a portal; everything runs locally. Because there is no app to install, the same link works on every device, and the protected file prompts for the password in whatever reader the recipient uses.
Why protect here instead of another site?
It is worth pausing on the irony of most online “protect PDF” tools: they ask you to upload the very file you are trying to keep private to their servers. This tool never uploads anything — the encryption happens inside your browser, and the password is set on your device and never transmitted. There are no watermarks, no account, and no limit on how many files you protect. For a task that is entirely about privacy, doing it locally is the only approach that makes sense.
How it compares
| Feature | This tool | Typical online PDF tools |
|---|---|---|
| File uploaded to a server | Never — encrypted in your browser | Usually uploaded |
| Password sent over the network | Never | Sometimes |
| Standard PDF password | Yes | Yes |
| Watermark on output | No | Sometimes |
| Account or sign-up | Not required | Often required |
| Price | Free | Free / paid tiers |
Features
Standard PDF encryption
Uses the password protection built into the PDF format, opened by any reader.
Open-password (user password)
Requires the password before the document will display at all.
Set on your device
The password never travels over the network — it stays with you.
Works everywhere
The protected file prompts for the password in any standard PDF viewer.
No installation
Nothing to download or install — it works on the web page.
Offline-capable
Once the page has loaded, protecting works even without internet.
Arabic & RTL friendly
Full interface in eight languages, including right-to-left Arabic.
Secure by default
Served over HTTPS, with no file tracking and no third-party upload.
Who uses it
Anyone sharing financial documents
Lock a bank statement or tax return with a password before emailing it.
Businesses
Protect contracts and internal reports so only intended recipients can open them.
Healthcare & legal
Add a password to sensitive records before they leave the office.
Everyday users
Password-protect an ID scan or private document — encrypted on their own device.
Frequently Asked Questions
Related PDF tools
Merge PDF
Combine several PDF files into one, in any order — right in your browser. Your files never leave your device.
Split PDF
Split a PDF into separate files — one per page, or by custom page ranges. Runs entirely in your browser.
Rotate PDF
Rotate all pages or specific ones by 90°, 180° or 270° — permanently and privately in your browser.
Delete PDF Pages
Remove the pages you don’t need and keep the rest — entirely in your browser, nothing uploaded.
Watermark PDF
Stamp text like CONFIDENTIAL or DRAFT across every page of a PDF — entirely in your browser, nothing uploaded.
Sign PDF
Place your signature image onto a PDF — choose the page, corner and size. Runs entirely in your browser; nothing is uploaded.
OCR PDF
Turn a scanned or image PDF into a searchable one — text is recognized in Arabic and English and added as an invisible, selectable layer. Runs entirely in your browser.
Compress PDF
Shrink a large PDF by re-rendering its pages at a smaller size — great for scanned documents. Runs entirely in your browser; nothing is uploaded.
PDF to Word
Convert a PDF into an editable Word document (.docx). Your file is processed securely on our server and deleted right after — nothing is stored.
Word to PDF
Convert a Word document (.docx, .doc, .odt) into a polished PDF that looks the same everywhere. Processed securely on our server and deleted right after — nothing is stored.
PDF to Excel
Extract the tables in a PDF into an editable Excel spreadsheet (.xlsx). Processed securely on our server and deleted right after — nothing is stored.
Excel to PDF
Turn an Excel spreadsheet (.xlsx, .xls, .ods, .csv) into a clean, shareable PDF. Processed securely on our server and deleted right after — nothing is stored.
PDF to PowerPoint
Convert a PDF into an editable PowerPoint presentation (.pptx). Processed securely on our server and deleted right after — nothing is stored.
PowerPoint to PDF
Turn a PowerPoint presentation (.pptx, .ppt, .odp) into a PDF that looks the same everywhere. Processed securely on our server and deleted right after — nothing is stored.
Unlock PDF
Remove the password from a PDF you own so it opens without prompting. Processed securely on our server and deleted right after — nothing is stored.
JPG to PDF
Combine JPG or PNG images into a single PDF, one image per page, in the order you choose. Runs entirely in your browser; nothing is uploaded.
PDF to JPG
Turn every page of a PDF into a high‑quality JPG image — download them individually or all together as a ZIP. Runs entirely in your browser; nothing is uploaded.
PDF to PNG
Turn every page of a PDF into a lossless PNG image — download them individually or all together as a ZIP. Runs entirely in your browser; nothing is uploaded.
Organize PDF
Reorder the pages of a PDF into any sequence — and drop the ones you leave out. Runs entirely in your browser; nothing is uploaded.
Add Page Numbers
Stamp page numbers onto every page of a PDF, in the position you choose. Runs entirely in your browser; nothing is uploaded.
HTML to PDF
Convert an HTML file into a clean, print‑ready PDF that keeps its layout and styling. Processed securely on our server and deleted right after — nothing is stored.
PDF to PDF/A
Convert a PDF into PDF/A, the ISO standard for long‑term archiving that embeds fonts and colours so the file looks the same for decades. Processed securely on our server and deleted right after.
PDF to CSV
Extract the tables in a PDF as CSV data you can open in any spreadsheet app. Processed securely on our server and deleted right after — nothing is stored.
Repair PDF
Try to recover a PDF that won’t open or shows errors by rebuilding its internal structure. Processed securely on our server and deleted right after — nothing is stored.
Extract Images
Pull every embedded image out of a PDF and download them together as a ZIP. Processed securely on our server and deleted right after — nothing is stored.
Redact PDF
Permanently black out words or phrases across a PDF — the page is flattened to an image so the hidden text can’t be recovered. Processed securely on our server and deleted right after.