Privacy Policy — DukPdf

We never see your files

DukPdf processes everything locally, right inside your browser. Your files don't travel to our servers, aren't stored anywhere, and aren't seen by anyone — including us. This isn't a setting you need to enable. It's how DukPdf works by default, for every user, on every tool.

Overview

DukPdf (“we”, “us”, or “our”) is committed to protecting your privacy. This Privacy Policy explains how we handle information when you use our website and web app (collectively, the “Service”).

DukPdf is built around a fundamental principle: your files are yours. We designed our tools so that file processing happens entirely in your browser, on your device. Files don't travel to our servers, so we never receive them, never store them, and never see them.

Please read this policy carefully. By using DukPdf, you agree to the practices described here. If you have any questions, you can reach us at tstym@dukpdf.com.

Data we collect

We collect as little data as possible. Here is a complete breakdown of what we do and do not collect:

✓ WHAT WE COLLECT

✓ Email address (only if you create an account)
✓ Basic usage analytics (pages visited, not file content)
✓ Anonymous error reports (crash diagnostics — no file content)

✕ WHAT WE NEVER COLLECT

✕ Your files or their contents — ever
✕ File names or metadata
✕ Which tools you use on which files

If you use DukPdf without creating an account, we collect no personally identifiable information at all. Your session is completely anonymous.

Local processing — how it works

This is the most important section of our privacy policy. All file processing in DukPdf happens locally on your device.

When you drop a file into any DukPdf tool — merge, compress, convert, sign, redact, or any other — the processing is performed by your own browser using WebAssembly. Your file is never transmitted to our servers.

Zero upload. When you drop a file, it stays on your machine. Our servers receive zero bytes of your file content.

Zero storage. We have no record of what files you process, how many, or what they contain. There is nothing to delete because nothing is stored.

Zero visibility. We don't see your files. We don't know what you're processing. Your files never reach us in the first place.

This applies to every user, on every tool.

Cookies

We use a minimal number of cookies to operate the Service. We do not use cookies to track your activity across other websites, and we do not sell cookie data to third parties. For the full list, see our Cookie Policy.

Session cookies — used to keep you logged in during your session. These expire when you close your browser.

Preference cookies — remember your language or theme settings. Stored only on your device.

Analytics cookies — anonymous, aggregated data about page visits. No personal information. No file content.

Third-party services

We use a small number of trusted third-party services to operate DukPdf. We do not share your file data with any of them — because we don't have it.

Analytics provider — anonymous, aggregated page analytics. No personal data. No file content.

Email provider — used to send transactional emails like account confirmation and support replies. We do not send marketing emails without explicit consent.

We do not sell, rent, or trade your personal information to any third party, for any reason, at any time.

Account data

If you create an account, we store only the minimum needed to keep it working.

Email address — used to identify your account and send account-related notifications or support responses.

Hashed password — stored using a modern one-way hash. We can't recover the original password — not even to help you reset it. A reset always creates a new one.

We retain your account data for as long as your account is active. You can request deletion of your account and all associated data at any time by emailing tstym@dukpdf.com. We will process deletion requests within 30 days.

None of your account data is ever linked to your file activity — because we have no record of what files you process.

Your rights

If you're in the EU, UK, or another jurisdiction with similar data-protection laws, you have the following rights over your personal data:

Access — request a copy of the account data we hold about you.
Rectification — ask us to correct inaccurate information.
Erasure — request deletion of your account and associated data.
Portability — receive your account data in a machine-readable format.
Objection — ask us to stop processing your data for specific purposes.

These rights apply to account data only — we have no file data to give you, because we have none. To exercise any of these rights, email tstym@dukpdf.com.

Changes to this policy

We may update this Privacy Policy from time to time. When we make material changes, we will email account holders and update the “Last updated” date at the top of this page. Continued use of the Service after a change means you accept the updated policy.

Contact

Questions about this policy, your data, or anything privacy-related? Email us at tstym@dukpdf.com. We read every message.