Privacy Policy

Last updated: April 2026

The Short Version

ZeroTool tools run entirely in your browser. We do not collect, store, or transmit any data you enter into our tools. Your data stays on your device.

Information We Do Not Collect

We do not collect:

  • Any input you provide to our tools (JSON, text, files, keys, passwords, etc.)
  • Personal identification information
  • Email addresses or account credentials (we have no accounts)
  • Payment information
  • Device identifiers tied to individuals

Analytics

We use Google Analytics 4 (GA4) to understand aggregate usage patterns — which tools are most popular, which pages are visited, and general geographic distribution. GA4 is configured with IP anonymization enabled, meaning the last octet of your IP address is masked before storage.

GA4 sets session cookies for the duration of your visit. These are standard analytics cookies and do not identify you personally. You can opt out of GA4 tracking by using the Google Analytics opt-out browser add-on.

Browser Storage

ZeroTool stores a small amount of data in your browser's localStorage so the site stays usable across visits. None of it is ever transmitted to our servers.

  • Theme preference — light, dark, or system.
  • Recently used tools — the last 20 tool slugs you visited, used to power the "Recent" list.
  • Tool input & preferences — for select tools (e.g. JSON Formatter, Base64, URL Encode), the most recent input is saved so you can refresh the page without losing work. Capped at 50 KB per tool and 2 MB total, with least-recently-used eviction. The JWT Decoder is exempt and never persists tokens. Click each tool's Clear button to wipe its saved input.

No third-party advertising cookies are set. To clear everything, use your browser's "Clear site data" feature or DevTools → Application → Local Storage.

Tool Data

All computation performed by ZeroTool tools happens in your browser using JavaScript. Input data (strings, JSON, files) is processed locally and is never transmitted to our servers. We have no technical capability to access the data you process in our tools.

Third-Party Services

We use the following third-party services:

  • Google Analytics 4 — anonymized usage analytics (described above)
  • Cloudflare Pages — hosting and CDN; Cloudflare may log request metadata per their own privacy policy

Changes to This Policy

If we make material changes to this policy we will update the date at the top of this page. Continued use of ZeroTool after changes constitutes acceptance of the revised policy.

Contact

Questions about this policy? Email us at [email protected].