We take the security of SheetCompare seriously. If you discover a security vulnerability, please report it privately rather than opening a public issue.

Please report security vulnerabilities through GitHub Security Advisories.

Please include:

• A description of the issue and potential impact
• Clear reproduction steps or proof-of-concept
• Any suggestions for mitigation

We kindly request that you do not publicly disclose vulnerabilities before they have been reviewed and addressed.

• SheetCompare executes parsing and diff calculations entirely in the local browser runtime.
• User table data does not leave your local device, and there are no backend servers, analytics trackers, or database connections.
• Important Note: Local in-browser processing does not constitute an absolute security guarantee or an automated sensitive data filter. Users remain responsible for managing sensitive spreadsheets within compliant client environments.