CSV Anonymizer

Upload a CSV file to fuzz and anonymize its data with configurable options and presets.

Select CSV File:

Maximum file size: 50MB. Supported formats: .csv

CSV Delimiter:

Used to parse the uploaded file and to format the anonymized CSV output.

Fuzzing Preset:

Choose a preset for quick setup or select "Custom" for full control. Each preset redacts everything the one above it redacts, and more.
Columns detected as sensitive identifiers (tax codes, national IDs, IBANs, card numbers) are always replaced with REDACTED, at every preset and in Custom. They are never fuzzed, because a perturbed identifier is still a recognisable variant of the original.

Advanced Parameters

Redact Numbers Replace numbers with "REDACTED" instead of fuzzing.

Number Fuzz Factor: 0.3

Redact Dates Replace dates with "REDACTED" instead of fuzzing.

Date Variation Range (Days): +/- days to vary dates.

Redact Strings (General) Replace general strings with "REDACTED" instead of fuzzing.

String Fuzz Probability (General): 0.5

Redact Strings (Light) Replace light strings (e.g., IDs) with "REDACTED" instead of fuzzing.

String Fuzz Probability (Light): 0.15

This is a static HTML application running on your browser. If you prefer to use it offline just download the application, extract csv-anonymizer-main.zip somewhere and open the index.html file with your browser. Source code available on GitHub

CSV Anonymizer

Advanced Parameters

Data Preview