Add Password
SecurityLive APILock a PDF with AES-256 encryption.
Add Password
Lock a PDF with AES-256 encryption.
or drop a file anywhere in this box · PDF
Files are processed securely and deleted after 1 hour.
Accepts
Returns
File
Batch
Single file
Cost
10 credits
How to add Password
Lock a PDF with a password so only the people you choose can open it. Bytefuse encrypts the file with strong AES-256 and lets you set an open password for readers plus an owner password that controls printing, copying and editing.
- 1
Upload your file
Drop in your PDF, or pick from your device.
- 2
Set your options
Tune a couple of settings to get exactly the result you want.
- 3
Download the result
Grab your file right away. Files are deleted automatically after an hour.
Why Bytefuse
Everything you get with Add Password
Fast, faithful to your document, and ready for real work — in the browser or over the API.
AES-256 encryption
Your document is sealed with strong AES-256, the same encryption trusted for sensitive financial and legal files.
Two levels of control
Set a user password to open the file and an owner password to restrict printing, copying and editing.
Nothing to install
Protect any PDF straight from your browser — no desktop software, plugins or accounts to configure first.
Automate it
Password-protect PDFs from your code with one REST call — SDKs and clear docs are included.
Do more with a free Bytefuse account
Create a free account to save your history, process bigger files, and unlock every document tool — no credit card required.
No credit card required · Already have an account? Sign in
Prefer to automate? Call it by API.
curl -X POST https://api.bytefuse.in/security/security/password/add \
-H "Authorization: Bearer dt_live_••••" \
-F "file=@document.pdf" \
-F "user_password=secret"Questions, answered
The user password is required to open the file, while the owner password lets you allow or block actions like printing, copying and editing.
We use AES-256, a strong modern standard. Without the password the file can't be opened or edited, so choose a password you can share safely.
No. Because encryption happens on your file itself, we can't unlock it for you — keep the password somewhere safe before you protect the document.
Open Add Password on Bytefuse, upload your PDF file, pick your options, and download the result in seconds. It works free in your browser with no signup, or through a single API call — files are automatically deleted after one hour.
Yes — it's free to try in your browser. Programmatic use through the API costs 10 credits per run.
They're encrypted in transit, processed only for your request, and automatically deleted within an hour. We never use them to train models.
PDF.
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