LocalCSV

Spreadsheet tools that run on your device. Your files never leave your computer.

What this page is

A deployment shell. There are no tools here yet — it exists to prove that the security headers, the static export, and the first-party asset policy all work before any real feature depends on them.

Browser capabilities

Checking what this browser supports…

How to check this page isn't uploading anything

  1. Open your browser's developer tools and select the Network tab.
  2. Reload this page.
  3. Every request should go to this domain and none should carry a request body. The content security policy sets connect-src 'self', so the browser itself blocks anything else — it is not a promise we are asking you to take on trust.