Last updated: August 2026
The short version
StringToJSONOnline is a static website. It has no server-side code, no database and no API. Everything you type or paste is processed by JavaScript running in your own browser and is never transmitted anywhere.
What we do not collect
- The contents of the input or output panes — these are never sent over the network.
- Files you upload or drag in — they are read locally with the browser File API.
- Accounts, email addresses or any personal information. There is nothing to sign up for.
- Advertising or cross-site tracking identifiers.
What is stored on your device
Two things are written to your browser's localStorage, which stays on your machine and is readable only by this site:
- Your theme preference (
sjo-theme) — so the site does not flash the wrong colours on your next visit. - Your most recent input per tool (
sjo:<tool>) — so a refresh or an accidental tab close does not lose your work.
Clearing a tool's input field removes its stored value. Clearing site data in your browser settings removes all of it. No cookies are set.
Hosting and logs
The site is served as static files from a commercial hosting provider. Like any web host, that provider may record standard request metadata — IP address, user agent, requested path, timestamp — for security and operational purposes. That is a property of how the web works, and those logs never contain the contents of your conversions, because the contents are never sent.
Third parties
The pages load no third-party scripts, fonts or analytics. Outbound links to external documentation are plainly marked; once you follow one, that site's own policy applies.
Children
The site is a developer utility and is not directed at children. It collects no personal information from anyone, regardless of age.
How to verify any of this
You do not have to take a privacy policy on faith when the claim is architectural. Open your browser's developer tools, switch to the Network tab, and convert something — you will see no requests beyond the page's own HTML, CSS and script. For a stronger check, disconnect from the internet entirely: every tool on the site keeps working, because there is nothing for it to talk to. You can also inspect what is stored by opening Application → Local Storage, where you will find the two keys described above and nothing else.
Your data, your device
Because nothing is collected, the usual data-subject mechanics have no subject to act on: there is no account to delete, no export to request and no record tying any conversion to you. If you want to remove what is stored locally, clearing site data in your browser settings does it immediately and completely.
Changes
If this policy changes, the date at the top of this page changes with it. The no-backend architecture is the foundation of the policy, so any meaningful change would require rebuilding the site.
Contact
Questions about this policy: frontendedy@gmail.com, or thecontact page.