JSON COMPARE

Privacy Policy

json-compare.com is built so your data never has a reason to leave your browser. This page explains exactly what that means — what we handle, what we don't, and where every local setting is stored.

The short version

  • Everything you paste or upload is parsed and compared entirely in your browser. It is never sent to a server.
  • No accounts, no sign-up, and no cookies.
  • Three cosmetic preferences — theme, layout width, and editor font size — are saved in your browser's local storage so they persist between visits. Nothing else is.
  • No analytics service is currently connected. If that changes, this page will be updated, and it will never include the content of anything you compared.

What happens to the JSON, text, XML, YAML, or CSV you compare

Whether you paste content directly, drag a file onto a panel, or use the Upload file button, it's read straight into your browser's memory using the File API and never leaves it. Parsing, formatting, and comparing all run as JavaScript on your own device — this site has no upload endpoint and no server that could receive that content even if it wanted to.

None of it is written to local storage, a database, or a log either. Refresh the page or close the tab and it's gone, the same as clearing a scratch pad.

What's stored in your browser

The only thing saved between visits is your interface preferences: light or dark theme, normal or stretched layout width, and editor font size. These are stored under keys prefixed json-compare: in your browser's local storage, are never transmitted anywhere, and can be cleared at any time through your browser's own site data settings.

Analytics

The site includes a small helper for basic, privacy-respecting usage events — which tool was opened, whether a comparison completed — written in a common, industry-standard format so it can plug into an analytics platform later. As of this writing, no analytics platform is actually connected, so these events aren't sent anywhere; they have nowhere to go. If that changes in the future, it will only ever cover which tool was used and whether an action succeeded — never the content of anything you pasted or uploaded, which this site has no way to see in the first place.

Third-party services

No third-party scripts, ad networks, or trackers are loaded on this site. Like virtually any website, our hosting infrastructure may keep standard technical logs (such as IP address and browser type) for security and operational purposes — that's a function of how web servers work, not something this site adds. Those logs can't include the content of anything you compare, since that content is never transmitted to begin with.

Changes to this policy

If this policy changes, the "last updated" date below will change with it, and any meaningful change in what the site actually does with your data will be described here — not just quietly edited away.

Last updated: September 14, 2026