# Never Leak Sensitive Data Again.
Detect and mask PII in documents before sharing with AI, cloud services, or third parties. Names, emails, phones, SSNs, credit cards, IBANs, Saudi IDs, Mada cards, Arabic names & 30+ entity types — 100% offline.
Upload, review, and export sanitized documents in seconds
Anywhere you'd normally paste sensitive content into an AI tool — maskr scrubs it first.
Hundreds of customer records pasted into a model — names, IBANs and national IDs walk out of the bank in plain text. maskr scrubs all three before you hit send, and keeps the analysis context intact.
Contracts have client names, addresses, ID numbers. Copilot only needs the structure — not the parties' identities. maskr masks the identifiers and leaves the clauses untouched.
Patient records carry national IDs, contact info, MRNs — protected under PDPL and HIPAA. maskr removes the identifiers before the notes ever reach an AI assistant.
CVs contain names, phones, emails, sometimes ID numbers — and unintended bias signals. maskr anonymizes them so AI ranking is fair, and your pipeline stays PDPL-safe.
Privacy-first document sanitization for the modern world
All analysis happens on your device. No data ever leaves your machine, no cloud services involved.
Works completely offline. Perfect for air-gapped environments and sensitive data handling.
Names (English & Arabic), emails, phones, SSNs, credit cards, Mada, IBANs, Saudi IDs, Iqama, MAC addresses, API keys, and more.
Supports PDF, DOCX, XLSX, TXT, MD, CSV, and HTML. Image OCR is coming soon.
Add your own names and keywords for project-specific detection with 100% confidence.
Automatically detect and remove company logos from DOCX files using perceptual hashing — landing in a future release.
Three simple steps to protect sensitive information
Drag and drop a document or paste text directly
See all detected items with confidence scores
Download the sanitized document
Wide format support with specialized capabilities
| Format | Parse | Export | OCR SOON | Logo Detection SOON |
|---|---|---|---|---|
| ✓ | ✓ | — | — | |
| DOCX | ✓ | ✓ | — | — |
| XLSX | ✓ | ✓ | — | — |
| TXT / MD | ✓ | ✓ | — | — |
| CSV / JSON | ✓ | ✓ | — | — |
| HTML | ✓ | ✓ | — | — |
| PNG / JPG / WebP | — | — | — | — |
How maskr stacks up against the alternatives people typically reach for.
| Criteria | maskr | ChatGPT privacy toggle | Manual find/replace |
|---|---|---|---|
| Files never leave your device | ✓ | ✗ | ✓ |
| Saudi ID · Iqama · Mada card | ✓ | ✗ | ✗ |
| Arabic name detection (150+ names) | ✓ | ⚠️ inconsistent | ✗ |
| Free | ✓ | bundled | ✓ |
| Setup time | < 1 min | (built-in) | seconds (per doc) |
| Preserves DOCX · XLSX layout | ✓ | n/a | ⚠️ breaks |
We pulled the comparison points from public docs, not marketing claims. Tell us if anything is off.
Free, private & offline. Available for all platforms.
maskr is in public beta — detection is solid and offline by design, but you may hit rough edges. Tell us if you do.
Other builds: macOS Intel · Windows portable · Linux .deb · Linux ARM
macOS Users: Since maskr is not signed with an Apple Developer certificate, macOS may block it from opening. To fix this, run:
xattr -cr /Applications/maskr.app
This removes the quarantine flag that macOS applies to downloaded apps.
Welcome! I’m Yasser Aldosary, a CISO. With my background in cybersecurity across the financial sector—working with SAMA and fintechs like Tweeq, Jeel Pay, and Malaah—I noticed an industry-wide pattern: people across the market were constantly pasting sensitive data into GPTs and AI tools without a dedicated way to protect local data like National IDs, Iqamas, mada cards, and Arabic names.
I built maskr to bridge that gap. I focused on making it as simple and user-friendly as possible, without compromising on effectiveness. We’re still in Beta, and I’d love to hear your thoughts. Drop me a message with any feedback or suggestions—I promise to read every single one.
dl.maskrapp.com to check the latest version number — that's it. Air-gapped environments work fine if you skip the update check.xattr -cr /Applications/maskr.app — that's safe and one-time. The app's code isn't actually modified.Found a bug, have a question, or want to talk enterprise? Drop us a line — we read every message.
While maskr downloads, want occasional updates on new features and releases? No spam, and we don't share your details. Your documents stay 100% on your device. See our privacy policy.