Privacy Policy

Effective date: September 13, 2026

Overview

chematic is an open-source project, not a company. This policy describes how the chematic.io website — and the chematic software it documents — handle information.

The website

chematic.io is a static site. We use Cloudflare Web Analytics to measure aggregate page views, referrers, and page-performance data so that we can improve the site. It does not use cookies or collect visitors' personal data. We do not use advertising analytics or cross-site tracking. Standard server access logs may be retained by our hosting infrastructure (Cloudflare Pages) in accordance with Cloudflare's privacy policy.

If you use the contact form, we process the name, email address, and message you submit solely to respond to that inquiry. The form is handled by Cloudflare Workers and delivered through Resend to contact@chematic.io. Do not include sensitive information in the form.

The in-browser demo on the homepage runs entirely as WebAssembly inside your browser. The SMILES you type, and anything you upload to the Local Compound Explorer, is never sent to any server — all computation happens locally on your device.

The software

The chematic library (Python, Rust, and JavaScript/WebAssembly) processes molecular data locally. It does not collect, store, or transmit your chemical data to any server.

One exception: the name_to_smiles tool in the optional chematic-mcp server sends a chemical name you provide directly to the PubChem API (pubchem.ncbi.nlm.nih.gov) to look up its structure. This happens only when you explicitly invoke that tool, runs as a local process on your own machine, and is subject to PubChem's own terms of service and privacy policy. No other part of chematic makes network requests.

Children's privacy

chematic is not directed at children under the age of 13. We do not knowingly collect personal information from children.

Changes to this policy

We may update this privacy policy from time to time. The effective date above indicates when it was last revised.

Contact

Questions about this policy can be raised on the contact page.