Last Updated: October 1, 2026
Heslab is a Chrome extension developed by 42V Labs. Heslab provides practical calculators and unit conversion tools for finance, crypto, everyday calculations, and unit conversions.
Heslab is designed with a local-first and privacy-focused architecture.
Heslab does not collect or transmit personal information to 42V Labs or third-party services.
Heslab does not collect:
Names or email addresses
Account credentials
Financial or payment information
Health information
Location information
Browsing history
Website content
User activity or analytics data
Advertising or tracking data
All calculations are performed locally within the Heslab Chrome extension.
Calculation inputs and results are not sent to external servers, APIs, or third-party calculation services.
Heslab is designed to work offline and does not require an internet connection for its calculation features.
Heslab uses the Chrome storage permission to store extension settings and user preferences.
This information is stored within Chrome's extension storage environment and is not transmitted to 42V Labs or external services.
Heslab does not use:
Analytics services
Tracking technologies
Telemetry
Advertising trackers
Third-party analytics SDKs
Heslab does not use external endpoints for calculation or analytics purposes.
Heslab does not use external calculation APIs or remote calculation services.
The extension does not use remotely hosted executable code for its calculation functionality.
Heslab does not require users to create an account or provide personal information to use the extension.
Heslab does not sell or share personal information with third parties.
No personal information is transmitted from the extension to 42V Labs or external services.
Heslab does not knowingly collect personal information from children or other users because the extension does not collect personal information.
This Privacy Policy may be updated if Heslab's data practices change.
When material changes are made, the Last Updated date at the top of this page will be updated.
For questions about Heslab or this Privacy Policy, please contact 42V Labs through the contact information provided on the official 42V Labs website.
Developer: 42V Labs
Product: Heslab — Chrome Extension