# Overview of Data Cleaner

Local Bulk Validation with No File Uploads Required

Your data never leaves your computer

The tool runs locally (Windows / macOS / Linux). Your CSV or Excel file is read entirely on your machine and is never uploaded as a whole. The only outbound connection is securely routed via HTTPS to `api.foxentry.com`, carrying only the individual field values you explicitly map for validation.

`Local processing` · `No telemetry` · `Single egress host` · `Open source (Apache-2.0)`

## What it is

Foxentry Data Cleaner is a lightweight, self-hosted utility that validates, corrects, and enriches contact data (emails, phones, names, locations, and companies) within your own CSV/Excel files by directly querying the Foxentry REST API.

Instead of uploading sensitive customer databases to a third-party cloud service, the tool processes your data row by row on your local machine and writes the results back to a new local file. The core application logic is transparent and consists of ~1,900 lines of highly readable Python code.

## Core Benefits

- **Zero File Uploads:** You remain the sole controller of your datasets. Local processing eliminates the typical compliance, legal, and security hurdles associated with cloud-based bulk validation tools.
- **GDPR Compliant by Design:** Only the specific string values you choose to map (e.g., an isolated email address or a phone number) are transmitted to our API.
- **No Telemetry:** The application does not track user behavior or analytics. By default, no request logs are saved to your disk unless explicitly enabled for debugging purposes.
- **Fully Auditable:** The tool is not a black box. Your IT and security teams can easily review the open-source codebase. Every release includes SHA-256 checksums and Sigstore attestations for strict integrity verification.
- **Zero Dependencies:** It requires no complex framework or environment setups. You do not need Python installed on your system to run the pre-compiled binaries.

## Quick Links & Downloads

The tool is available for all major operating systems. Simply download the standalone executable and run it:

- [**Windows (.exe)**](https://github.com/Foxentry/data-cleaner/releases/latest)
- [**macOS**](https://github.com/Foxentry/data-cleaner/releases/latest)
- [**Linux**](https://github.com/Foxentry/data-cleaner/releases/latest)
- [**Source Code (GitHub Repository)**](https://github.com/Foxentry/data-cleaner)

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**Next step:** Dive deeper into how the tool securely processes data in the **Architecture & Data Flow** section.