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Fast, free, browser-only tools. Your files stay on your device.

Compress PDF Merge PDFs
60 browser tools Works on mobile Free to use

No File Logs

We do not upload, store, or track the files you process.

No Backend

All processing happens inside your browser.

100% Free

Every tool is free. No hidden costs.

Total Transparency

Built for trust with clear local limits.

PDF Security / Beta

Password Protect a PDF Online

Create a standard password-protected PDF with AES-256 or legacy RC4 and supported permission controls.

About this tool

About Protect PDF

Create a standard password-protected PDF with AES-256 or legacy RC4 and supported permission controls. The selected PDF and password is processed locally in this browser without being sent to a backend conversion server. NoLogPDF cannot recover a forgotten password; keep it securely outside the website.

Use Protect PDF when you need to add supported password encryption and permission flags to a PDF. Common uses include require a password before opening a shared pdf, limit supported reader actions with permission flags, create an encrypted distribution copy locally.

How to use Protect PDF

  1. Choose a PDF file.
  2. Enter and confirm an open password, plus an optional owner password.
  3. Choose AES-256 or legacy RC4 and set permission checkboxes.
  4. Create, download, and test the protected PDF in a compatible reader.

What Protect PDF changes

  • Encrypts the PDF with the selected mode and open password.
  • Writes supported printing, copying, editing, and annotation permission flags.

Browser-only privacy

The selected PDF and password is processed by JavaScript running in this browser for Protect PDF. NoLogPDF does not send the file to a backend conversion API, and file names, contents, form values, passwords, and output data are excluded from site analytics.

Limits to know before using Protect PDF

  • NoLogPDF cannot recover a forgotten password; keep it securely outside the website.
  • Reader support and enforcement of permission flags vary, and legacy RC4 is weaker than AES-256.

Common uses for Protect PDF

  • Require a password before opening a shared PDF.
  • Limit supported reader actions with permission flags.
  • Create an encrypted distribution copy locally.

Next step: Continue this workflow with Unlock PDF.

Protect PDF questions

How does Protect PDF work?

Create a standard password-protected PDF with AES-256 or legacy RC4 and supported permission controls. Choose a PDF file. Enter and confirm an open password, plus an optional owner password. Choose AES-256 or legacy RC4 and set permission checkboxes.

Does Protect PDF upload my PDF and password?

No. The selected PDF and password is read by code running in this browser for this operation. NoLogPDF does not send the selected file to a backend conversion API or include file data in analytics.

What does Protect PDF change in the output?

Encrypts the PDF with the selected mode and open password. Writes supported printing, copying, editing, and annotation permission flags.

What limits should I know before using Protect PDF?

NoLogPDF cannot recover a forgotten password; keep it securely outside the website. Reader support and enforcement of permission flags vary, and legacy RC4 is weaker than AES-256.

Which encryption mode should I choose?

Use AES-256 for modern readers. Choose legacy RC4 only when an older reader cannot open PDF 2.0 AES-256 output and you accept the weaker compatibility mode.

Related tools

Why NoLogPDF

Built for sensitive files that should stay on your device

NoLogPDF is designed around browser-only processing. The tools load in your browser, run on your computer, and give you honest limits when a format needs server-grade conversion.

No uploads PDFs, images, text, HTML, spreadsheets, and signatures are processed locally.
No signup Open the tool, choose your file, process it, and download the result.
Useful limits Browser-only tools tell you when exact conversion is limited instead of pretending.
Daily workflow Organize, convert, secure, inspect, and clean up files from one simple dashboard.

Local-first privacy

Your data never leaves your device

NoLogPDF is built around privacy principles used by serious teams: minimize data movement, avoid unnecessary collection, and make processing limits visible.

GDPR

Privacy by design

Files are processed locally, so personal documents are not sent to our servers for conversion.

CCPA

No file profiling

NoLogPDF does not need account profiles, uploaded files, or file-processing histories to run tools.

HIPAA

Sensitive-file aware

Useful for private workflows, but not a substitute for your organization's legal compliance process.

Example use cases

Practical browser-only workflows

Freelance workflow

Merge contracts and create smaller client-report copies without sending the documents to a conversion service.

Student reports

Organize assignment pages and use the visible browser-only limits to choose an appropriate conversion workflow.

Office cleanup

Delete pages, reorder a packet, add a visual signature or watermark, and review common document metadata.

Privacy-first use

Work with sensitive local files without an account, file-upload queue, or backend conversion server.

Image and PDF mix

Convert image formats, adjust dimensions, and create PDFs from images in the same local workspace.

Honest conversion

Review clear limits when Office conversion, OCR, aggressive compression, or page rendering cannot be exact.

Docs

How NoLogPDF works

1. Choose a tool

Pick a PDF, image, or document utility from the dashboard or quick menu.

2. Process locally

The browser loads the needed JavaScript libraries and processes your selected file on this device.

3. Download output

The result is generated in-browser and downloaded directly. No backend upload is required.

Quick answers

Frequently Asked Questions

Is NoLogPDF really free?

Yes. The tools run in your browser and do not require an account or payment gate.

Are my files uploaded?

No. The tools run inside the browser with local JavaScript libraries. There is no conversion API behind the page.

Why are some tools marked Beta?

Some PDF jobs need browser rendering or experimental file parsing. Those tools still work locally, but exact layout can vary.

Can NoLogPDF replace every server PDF converter?

Not for perfect Word/PPT reconstruction or heavy compression. The site favors privacy and transparency over fake perfect results.

Do you use cookies or analytics to track me?

Google Analytics collects basic page-view and site-usage information. NoLogPDF never sends file names, file contents, form inputs, passwords, signatures, or conversion data to Analytics. Your theme preference is saved locally in your browser.

How does the helper answer questions?

The helper answers common questions locally. For a genuinely unmatched question, it can send only the text you typed to protected online support. Files, filenames, document contents, passwords, and conversion results are never included.

How do I get help?

Use the support email in the footer: nologpdf@gmail.com.