Privacy
Short version: this tool can't see your data. There is no server to send it to.
Last updated 2026-06-27
How the converter works
The HL7 v2 → FHIR R4 converter runs entirely inside your browser. When you paste a message, the parsing and conversion happen locally in JavaScript on your own device. The message you paste, the FHIR bundle it produces, and everything in between stay in the browser tab. Nothing is transmitted to Zkeleton or to anyone else.
What we collect
Nothing. We do not collect, receive, store, log, or transmit the messages you convert. Concretely, this site has:
- No upload of your input — conversion is client-side only.
- No backend, API, or database that receives clinical data.
- No cookies, local-storage tracking, or fingerprinting.
- No analytics, tag managers, or advertising scripts.
- No third-party requests. Fonts and code are served from this domain only — the page makes zero calls to any outside host.
You can verify this yourself: open your browser's developer tools, go to the Network tab, and reload. Every request points to hl7.zkeleton.com and there is no traffic while you type or convert.
The shareable link
The “Copy link” button encodes your input into the URL fragment (the part after #). Browsers do not send the fragment to any server, so the data still never leaves your machine over the network. However, a link you create contains your message and will reconstruct it for anyone you send it to. Treat a shared link like the message itself — only share it with people who are allowed to see that data.
Hosting
The static files for this page are served by our hosting provider (Vercel), which may keep standard, aggregate web-server access logs (such as IP address and requested file) for security and operational purposes. Those logs are about the request for the page — never the contents of a message you convert, which the server never receives.
PHI and your responsibilities
This tool is designed so that protected health information (PHI) never leaves your browser. Even so, you are responsible for handling clinical data in line with your own legal and organizational obligations (for example HIPAA). Use a trusted device and browser, and clear the input when you are done.
Changes
If this policy changes, the “Last updated” date above will change with it. Material changes to how the tool handles data would be reflected here before they take effect.
Contact
Questions about privacy: hello@zkeleton.com.