SheetSure · Privacy Policy

Effective November 12, 2026 · Version 1.0.0

Scope

This policy applies to SheetSure version 1.0.0, a Chrome extension provided by Marcos Yang. It compares, fills and validates Excel files explicitly selected by the user. No account is required.

Data processed on your device

After you choose a file, the extension reads its workbook contents, filename, worksheets and headers on your device and performs the operations you configure. Workbooks may contain business or personal information that you put in them. This information is used for your requested reconciliation, previews, exports and session restoration. The developer does not receive these files or their contents through the extension.

Local storage

To restore your work after reload or reopening, the extension stores workbooks and session settings in IndexedDB for the current browser and extension origin. It stores configuration templates, language preferences and appearance preferences in localStorage. Results can be recalculated from the stored files and rules. The extension does not upload or sync this information to the developer. It does not apply additional encryption to browser storage.

Transfers, sharing and analytics

The extension does not upload workbooks, filenames, results or settings. It has no advertising, analytics SDK, remote error reporting or third-party data service. It does not sell or transfer this data to third parties, or use it for creditworthiness or lending decisions. All runtime scripts and dependencies are bundled. Browser and extension-store installation and update services operate under their providers’ policies.

Permissions and access

The extension requests no web page, browsing-history, clipboard, downloads API or unrestricted file-system permissions. It reads files that you explicitly select and runs in its own tab. It does not read pages you are browsing. Export creates a new file for you to save and preserves the original file on disk.

Retention and deletion

Workbooks and settings remain in the current browser’s extension storage until replaced by a later session, cleared by you, removed by uninstalling the extension or affected by browser storage cleanup. You can use Remove file to remove a file from the current workspace and wait for local saving to finish. This operation does not provide secure erasure of device media. Uninstall the extension or clear all of its storage to remove its saved local data. Exported workbooks, reports and templates are independent files that you delete separately. The developer has no server copy to restore or delete remotely.

Your choices

You decide which files to choose, which rules to configure and whether to export results. Different browsers and extension IDs have separate storage. Access on a shared device depends on its operating-system accounts and browser configuration.

Contacting support

If you independently email support, the developer receives the email address, problem description and attachments that you choose to provide. This information is used to address your request and necessary follow-up. The extension does not send support messages automatically. Please use a redacted minimal example when a sample is needed. You may contact the address below to request deletion of support data, except information that must be retained by law.

Limited Use

The extension’s use of user data complies with the Chrome Web Store User Data Policy, including Limited Use requirements. Data is used for the disclosed Excel reconciliation features and support you request. It is not used for advertising targeting, profiling or unrelated purposes.

Updates and contact

This policy and store disclosures will be updated when the product’s data handling changes. Developer — Marcos Yang. Contact — marcosyang183@gmail.com.

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