Welcome to PII Checker Online
PII Checker Online is a hosted service for data editors to scan replication packages — already published, or about to be made publicly available — for personally identifiable information, with no infrastructure of your own required. Classification is performed by an open-source model we run ourselves; your data is never sent to a third-party AI company.
For usage on your own replication packages prior to publishing, see Run it yourself.
Upload a package
A zip archive or an individual data file.
Extraction and screening
Files are unpacked, duplicates identified, and every column screened against rule-based criteria to decide which are worth checking.
Classification
Each candidate column and its values are evaluated for the presence of PII by a large language model. Classification is performed by an open-source model (Gemma 4) that we run ourselves on servers hosted on Google Cloud infrastructure — the data is not sent to an AI company to be processed.
Report
A downloadable spreadsheet, one row per checked column containing the classification.
Your data are stored only for as long as necessary.