ARX Data Anonymization Tool

ARX Data Anonymization Tool is ranked #10 of 22 in data masking software on The Geeks Club. It runs on API, Linux, macOS, Self-hosted, Windows. There is a free plan.

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ARX Data Anonymization Tool Free Open-source software · Apache License 2.0 arx.deidentifier.org · 3 Oct 2026

Compared on data masking software

Masking methods: static
Deployment options: on-premises
Data subsetting: Yes
API access: Yes

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ARX Data Anonymization Tool

Purpose: ARX is open-source software for anonymizing sensitive personal data and supports privacy and risk models, data transformation methods, and utility analysis.
Use cases: The maker says ARX has been used for commercial big data analytics, research projects, clinical trial data sharing, and training.
Graphical application: The graphical tool supports data import and cleansing, transformation-rule wizards, tailoring anonymized datasets, and analysis of utility and residual re-identification risks.
Java library: ARX provides a Java software library with a clean API for adding data anonymization capabilities to Java programs.
Privacy models: The maker lists k-anonymity, l-diversity, t-closeness, δ-presence, risk-based criteria, and semantic models including differential privacy among its supported methods.
Data sources: The graphical tool imports CSV, MS Excel, and relational database data, including MS SQL, DB2, MySQL, and PostgreSQL.
Data preparation: The import wizard can rename, remove, and reorder columns, automatically detect data types, and replace values that do not match a specified type with null values.
Output and utility: ARX exports displayed tabular data to CSV and can compare input and transformed data using information-loss models, descriptive statistics, and application-specific analyses such as machine-learning tasks.
Risk analysis: The tool reports re-identification risks for prosecutor, journalist, and marketer attacks, estimates population uniqueness, and can identify HIPAA Safe Harbor identifiers and further quasi-identifiers.
Platforms: The maker offers 64-bit installers and runnable JAR files for Windows, MacOS, and Linux/GTK, and describes the graphical application as platform-independent Java/SWT software.
Security and integrity: The maker provides checksums for downloads signed with its PGP/GPG key so users can verify download integrity.
License and warranty: ARX is licensed under Apache License 2.0, and the download page states that the software is provided “AS IS” without warranties or conditions.
Support contact: The maker invites users to contact the ARX team by email at [email protected].
Documentation limitation: The API page says its documentation was quite outdated as of March 2018 and that functionality added since then was not yet documented there.
Price from: Free

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Where it ranks on The Geeks Club

Best Data Masking Software in 2026#10 of 22

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Sources

arx.deidentifier.org· checked 3 Oct 2026
arx.deidentifier.org/overview/· checked 3 Oct 2026
arx.deidentifier.org/anonymization-tool/· checked 3 Oct 2026
arx.deidentifier.org/downloads/· checked 3 Oct 2026
arx.deidentifier.org/imprint/· checked 3 Oct 2026
arx.deidentifier.org/development/api/· checked 3 Oct 2026