The private PDF editor — your files never leave your device
Merge, compress, edit, redact, OCR and convert PDFs entirely in your browser. Nothing is uploaded, nothing is stored, and there's nothing to install.
Open the toolsVerify it yourself
Open your browser's developer tools → Networktab, then process a PDF here. You'll see zero upload requests — proof the file is handled entirely on your device. No cloud PDF tool can show you that.
Files never leave
Processing runs on your device. No server uploads, no retention.
No account, no ads
No account, no email, no ads on the site. Analytics runs only if you allow it — never personalized ads or remarketing.
Works offline
Once loaded, the tools keep working with no internet connection.
Why “never uploaded” matters
Most online PDF tools upload your document to a server, process it, and delete it after a few hours. For everyday files that's fine. But for confidential documents, every upload is a copy of your data on someone else's infrastructure — something that can be intercepted, logged, subpoenaed, or breached. In March 2025 the FBI warned that some free online converter sites push malware and harvest uploaded files, and document services have been breached before (~77 million Nitro PDF records leaked in 2021).
DukPdf takes the upload out of the equation entirely. No transfer means no third-party processor, no data-residency question, and no breach surface — the document simply stays where it already is.
For confidential work
Legal
Keep privileged client documents off third-party servers. Redact without uploading →
Healthcare
Handle records without a third party touching PHI. HIPAA & online PDF tools →
Finance
Process customer statements with nothing leaving the device. Is uploading safe? →
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Frequently asked questions
Are my files uploaded to a server?
No. Every DukPdf tool processes your PDF directly in your browser using WebAssembly. Your files never leave your device — you can confirm it in the browser Network tab, where no document is sent.
How is this different from iLovePDF or Smallpdf?
Those are cloud tools: your document is uploaded to their servers, processed, then deleted after a retention window. DukPdf never uploads at all, so no third-party server ever holds your file.
Is it safe for medical, legal, or financial documents?
Because the file never leaves your device, there is no third-party data processor to vet, no business-associate agreement to sign, and no file transfer to intercept. That structurally removes the biggest risk of using an online tool for confidential documents.
Do I need an account?
No. There is no account or email required to use the tools — and analytics runs only if you allow it.
Does it work offline?
Yes. Once a tool has loaded, it runs entirely on your device and keeps working without an internet connection.