What encryption is used?

We use 256-bit AES encryption, the same standard used by banks and governments. Your PDF will be highly secure.

Can I set different permissions?

Yes! You can set an open password (to view) and a permissions password (to edit/print). Control exactly what recipients can do.

Is my password stored anywhere?

No. All encryption happens locally in your browser. We never see or store your password.

Can I remove the password later?

If you have the password, you can open the PDF in any reader and save it without protection, or use our tool to create an unprotected copy.

Protect & Unlock PDF

100% Private

100% Local

No Signups

Select PDF to Protect

Upload the file you want to secure

Select PDF

100% Private

Instant

Your files never leave your device

Max file size: 150MB

Built for larger private PDFs

Up to 150 MB

No upload

Firewall friendly

Most cloud PDF tools need uploads, accounts, or free-tier caps for large files. ExactPDF processes files locally in your browser, supports PDFs up to 150 MB on this tool surface, and never adds a watermark or daily quota.

Related Tools

Other free, browser-only PDF tools that pair well with this one.

Merge PDFs

Combine PDFs before applying password protection.

Split PDF

Split a confidential PDF into per-recipient packets.

Unlock PDF

Remove an existing password (if you own the file).

Why Local PDF Processing is More Secure

Learn how browser-based PDF tools protect your privacy better than cloud services.

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Advanced PDF Features: Batch Redaction & Forms

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