Does jsonsql.dev collect my data?
No. jsonsql.dev processes 0 bytes of user data on its servers. Every tool on jsonsql.dev processes data entirely in your browser using JavaScript. Nothing is sent to any server — ever. There is no backend, no API calls, no data collection endpoint. The site is deployed as static HTML, CSS, and JavaScript files — there is no application server capable of receiving your data.
This applies to all 19 tools: when you paste JSON, decode a JWT, encode Base64, or generate a hash — every operation runs locally in your browser's JavaScript engine. Your data stays on your machine from start to finish.
Does jsonsql.dev use cookies or tracking?
jsonsql.dev sets 0 cookies and runs 0 analytics scripts. The only browser storage used is localStorage to remember your theme preference (light or dark mode) and sidebar state. No analytics scripts, no tracking pixels, no fingerprinting, no Google Analytics, no Facebook Pixel, no third-party scripts of any kind.
Do I need an account to use jsonsql.dev?
No. There are no accounts, no sign-ups, no email collection, no paywalls. You open a tool and use it — that's it. jsonsql.dev will never ask for your email address or personal information.
How can I verify no data is sent?
You don't have to take our word for it. You can verify jsonsql.dev's privacy claims yourself in under 30 seconds:
- Open any tool on jsonsql.dev
- Open your browser's Developer Tools (F12 or Ctrl+Shift+I)
- Go to the Network tab
- Paste data and use the tool normally
- Observe: no network requests are made when you process data
The only network requests you'll see are the initial page load (static HTML, CSS, JS files) and font files. Zero requests are made when you interact with any tool. This is verifiable, not just a promise.
Where is jsonsql.dev hosted?
jsonsql.dev is hosted on Cloudflare Pages as static files served from a global CDN. Cloudflare may collect standard web server logs (IP address, user agent, timestamp) as part of their infrastructure. jsonsql.dev itself does not access, store, or process any of this data. See Cloudflare's privacy policy for details.
Will this policy change?
If this policy changes, the update will be reflected on this page with a new date. The core commitment — zero server-side data processing — is an architectural guarantee, not just a policy decision.
Last updated: April 16, 2026