Privacy Policy
Last updated: March 15, 2026
TL;DR
Your JSON data never leaves your browser. We don't use cookies, we don't track you across websites, and we don't store any personal information. All transformation and patching is 100% client-side. The only analytics we use is Vercel Web Analytics, which is privacy-friendly and cookieless.
100% Client-Side Processing
All JSON transformation, diffing, and patching on this site happens entirely in your browser. Your data is never sent to any server, never logged, and never stored anywhere outside your own machine. When you paste JSON into the editor, it stays right there — in your browser tab's memory.
Once you close the tab, the data is gone. We have zero access to it.
What We Don't Collect
To be explicit, we do not collect:
- Your JSON input data or patch output
- Personal information (name, email, IP address)
- Browser fingerprints or device identifiers
- Any form of cross-site tracking data
Analytics
We use Vercel Web Analytics to understand basic, aggregate usage patterns (e.g. page views, referrers, country-level geography). Here's what makes it different from traditional analytics:
- No cookies — nothing is stored on your device
- No cross-site tracking — your activity is not followed across the web
- No personal data — no IP addresses, no fingerprints, no PII
- GDPR-compliant by design — which is why you don't see a cookie consent banner
Cookies
This site uses zero cookies. None. That's why you don't see an annoying consent banner when you visit — because there's genuinely nothing to consent to.
Your theme preference (light/dark) is stored in localStorage, which is a browser-local storage mechanism that is never transmitted to any server.
Data Security
Since your data never leaves your browser, the attack surface is effectively zero on our end. The site is served over HTTPS, and all static assets are delivered via Vercel's edge network with modern security headers.
Third-Party Services
The only third-party services we use are:
- Vercel — hosting and edge delivery (Vercel Privacy Policy)
- Vercel Web Analytics — privacy-friendly, aggregate-only page analytics (Analytics Privacy Policy)
We do not use Google Analytics, Facebook Pixel, or any other tracking service.
Changes to This Policy
If we make meaningful changes to this policy, we'll update the "Last updated" date at the top. Given the nature of this tool (everything runs client-side), significant privacy changes are unlikely.
Contact
If you have any questions about this policy or how the site works, you can reach us at privacy@jsonpatchonline.com.