01
Open document
Open a PDF or scan in Datenmaske — everything after that runs locally on the Windows workstation.
Windows · Local processing · Early Access
Detect sensitive information locally. Review. Redact permanently.
Datenmaske automatically detects sensitive information in your documents — right on your Windows PC. You review the matches and produce a permanently redacted version, ready to share.
No credit card · Local processing · Windows
Redaction, step by step
Sample file · local 42 Seiten · 1,8 MB
Arzthaftungsakte · Gutachten Dr. med. Anna Beispiel
Patient Max Mustermann, geboren am 12.04.1978, wohnhaft Musterstraße 12, 10115 Berlin.
Versicherungsverhältnis: DE44 5001 0517 5407 3249 15 bei der Allgemeine Versicherung AG.
Diagnosen und Befunde werden auf den Seiten 4–38 geführt; die epikritische Bewertung schließt die Akte ab.
Flagged findings: 5
Verified · content removed
Nice try. Real redaction would have given you nothing. Try free for 7 days →
Workflow
From intake to export, the file stays local.
Five verifiable steps, no black-box automation.
02
Detect sensitive passages
Rule-based detection and local models flag names, addresses, IBANs and other personal data.
03
Review the matches
Every suggestion stays under human control. Recurring entities can be reviewed together; manual regions remain available.
04
Redact permanently
Confirmed passages are removed from the document — not merely covered. The text beneath disappears from the file.
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Export verified
MuPDF removes confirmed content. Secure reopens the result and refuses the export if the check reveals a gap.
The principle in eight seconds.
The animation explains the problem and the detection layers. It is not a recording of the user interface. The free web demo shows the real workflow.
§ 203 StGB
Trust is enforced here by design.
Secure doesn't rely on a promise but on a verifiable local architecture.
Document path without network
PDF pages, OCR text, findings, and redactions stay on the device.
Signed detection models
Revision, size, and SHA-256 are checked against an Ed25519-signed manifest.
Fail closed
An incomplete verification is not a warning — it's an export block.
File-grade evidence
The redaction log records status, data types, and file hashes.
Editionen
A clear line between local and hosted.
Not every file belongs in a cloud. That's why Secure is the main product — and Web is deliberately the complementary edition.
Main product Secure
For professional secrets, patient files, client documents, and large document collections. Processing on Windows workstations, with local models and a verifiable export block.
- 100 % local document path
- OCR and detection on-device
- Offline-capable after setup
- Workstation license
gehostet · EU
Web
EU-hosted self-service for vetted use cases, teams, and API workflows. Not the local §-203 path.
Try for free →Fragen & Antworten
Questions before your first local run.
01 Do documents or detected content leave my machine? +
No. In Datenmaske Secure, PDF processing, OCR, detection, review, and redaction run locally on the workstation. An internet connection may be needed for license checks and the optional model download; document content is not transmitted in the process.
02 What's the difference between Secure and Web? +
Secure is the local desktop edition for confidential files and professional secrets. Datenmaske Web is the EU-hosted self-service for vetted use cases, collaboration, and API workflows. The free web demo is a good way to learn the workflow — not for content that must stay local.
03 Is the redaction really permanent? +
Confirmed passages are removed from the PDF content with MuPDF, not just covered. The output file is then reopened and checked. If this verification fails, Secure refuses the export.
04 Who is Datenmaske Secure for? +
Primarily for lawyers, notaries, tax advisors, auditors, doctors, psychotherapists, and their teams. Secure is especially suited to voluminous files, recurring individuals, and workstations where documents must not leave the device.
05 What does Datenmaske cost? +
During Early Access, Datenmaske is free to use: the Web edition with all features, and Datenmaske Secure as a 7-day test licence. Final prices will be published here at launch — no automatic charges, no hidden renewals.
06 How do I get access? +
Sign up for the Secure Early Access and confirm your email address — your 7-day test license arrives by email. The signed installers are openly available on the download page.
Early Access
Seven days of Secure. On your machine.
Sign up, confirm your email — and your test license arrives: seven days of Datenmaske Secure, every feature, one workstation, fully local. No payment, no obligation.