Personal Identifiers // Detector
Find tax IDs, EINs and ITINs
FileSentinel finds taxpayer identification numbers so EINs and ITINs do not leak through shared tax and finance files.
What it detects
What FileSentinel finds
FileSentinel detects employer identification numbers, individual taxpayer identification numbers, and related tax IDs by format and context, scoring each finding. Because ITINs and SSNs share a nine-digit shape, the surrounding context drives accurate classification.
Where it hides
- PDF tax forms
- Spreadsheets and CSV exports
- Word documents
- Scanned forms (via OCR)
// RESULTS — findings scored by confidence and severity
Why it matters
The risk of leaked tax IDs
Taxpayer IDs enable financial fraud and fraudulent filings. They gather in tax returns, W-9 and 1099 forms, payroll exports, and accounting spreadsheets.
- Tax returns and W-9 / 1099 forms
- Payroll and accounting exports
- Vendor and contractor records
- Scanned tax paperwork
How FileSentinel handles it
Built-in detection, scored and local
FileSentinel reads inside your files on your own machine, flags tax IDs with a confidence and severity score, and helps you remediate. Built-in detectors cover the common cases, and a custom rule builder lets you add plain-text or regex detectors for anything specific to your work.
Score
Every finding gets a confidence and severity score, so real tax IDs rise above coincidental matches.
OCR
With OCR on, FileSentinel reads text inside images and scanned PDFs, catching tax IDs in screenshots and scans.
Remediate
Redact values, mark false positives, or export a CSV, HTML, or PDF report, then share with confidence.
Private by design
Your files never leave your PC
Scanning, OCR, and remediation all happen on-device. FileSentinel makes no network connections to do its work, so the very data you are trying to protect never has to leave your machine to be checked. No server, no cloud, no upload step.
More FileSentinel scanners
Find and clean more sensitive data
Questions & answers
Find tax IDs FAQ
How do I find tax ids, eins & itins in my files on Windows?
Install FileSentinel from the Microsoft Store, point it at a folder or drive, and start a scan. FileSentinel reads inside your files, flags tax ids, eins & itins, and scores each finding by confidence and severity so the real risks rise to the top.
Is scanning for tax ids, eins & itins private?
Yes. FileSentinel runs entirely on your device. Scanning, OCR, and remediation all happen locally with no uploads and no cloud, so the data you are trying to protect never has to leave to be checked.
Can FileSentinel tell an EIN or ITIN apart from an SSN?
It uses formatting and surrounding context to classify nine-digit taxpayer numbers, so an EIN on a W-9 or an ITIN on a return is recognised for what it is, each with its own confidence score.
What file types does FileSentinel check for tax ids, eins & itins?
FileSentinel reads inside documents, spreadsheets, text, and PDFs, and with OCR enabled it reads text inside images and scanned PDFs too, so tax ids, eins & itins captured in a screenshot or scan is caught as well.
Get FileSentinel
Find Tax IDs, EINs & ITINs in Your Files
Install FileSentinel from the Microsoft Store and scan your files for sensitive data, all on your Windows PC with nothing uploaded.