100% Client-Side & Serverless
All Markdown parsing, KaTeX math rendering, and Mermaid diagram rendering execute 100% locally inside your web browser. No document text or metadata is ever transmitted to external servers or AI APIs.
Privacy Policy & Security Guarantees
Prisment is built from the ground up with 100% client-side browser privacy, zero server storage of user documents, and total file isolation.
Privacy-First Web Analytics & Document Isolation
Your document content, text, and files never leave your device and are never sent to any server. On our hosted web application (prisment.io), we use standard Google Analytics to count aggregate page visits and which features are used — a desktop download or an HTML export, never the document itself — and to optimize web app performance. The desktop app collects only anonymous, aggregate usage data (a daily active signal, OS, app version, and coarse country-level location) to improve it, which you can disable anytime from the Help menu — no document content, text, or file names, ever. We never sell user data. The hosted website measures ad conversions for our own campaigns; the desktop app carries no advertising SDK of any kind.
Local Machine Data Isolation
When you mount local folders or edit drafts, your files remain strictly on your device. File System Access API operations occur directly between your web browser and your local disk without cloud proxies.
Standalone HTML Export
An exported document carries your content and nothing else — no account data, no identifiers and no analytics: an export never reports anything back to us or to a third party. It is a single HTML file that loads its stylesheet and runtime from cdn.prisment.io the first time it is opened and then caches them, so it is not a fully offline bundle. With no network at all the page still shows your document as plain, copyable text rather than a blank page. For a guaranteed-offline copy, use Print / PDF.
Free, Local & Private Guarantee — No user files ever leave your browser
Have additional questions about our security architecture? Check our FAQ or reach out to our team.