Privacy Policy
Last updated: September 2026
Overview
ToolStack provides free online tools that run entirely in your browser. We designed the service to require as little data as possible — ideally none at all.
Data processed by the tools
Files, text and other content you use with our tools — for example JSON you paste into the JSON Formatter — are processed locally on your device. This content is never uploaded to, stored on, or seen by our servers.
Analytics
We collect anonymous usage statistics such as which tool was opened and which language was used, plus aggregated error counts. We never collect the content you enter into any tool. Analytics data contains no personal identifiers.
Cookies and local storage
We use your browser's local storage to remember preferences such as your language and color theme. See our Cookie Policy for details.
Advertising
Some pages may display ads served by third-party partners, which may set their own cookies. Ads are clearly separated from the tools and never receive the content you enter.
Contact
For privacy-related questions, contact us at [email protected].