Fast Markdown Reader
Fast Markdown Reader collects nothing
Effective date: 2026-07-17 · Publisher: DubDubDub Corp.
Fast Markdown Reader is a Markdown reader for macOS. It has no analytics, no telemetry, no crash reporting, no accounts, and no servers of its own. This page explains exactly what the app does and does not do with your data.
What we collect
Nothing. There is no analytics library, no telemetry, and no crash reporting built into the app. We do not know who has installed it, what documents you open, or how you use it. There is no account to create and no server that the app talks to for its own purposes.
Your documents never leave your Mac
Fast Markdown Reader is not a cloud service. Every document you open is read from your Mac and rendered on your Mac. It is a reader first, but it can edit: if you right-click a block and fix its Markdown, that change is written straight back to the file on your own Mac. Nothing about a document's content is sent anywhere.
The only network activity
- Remote images your own document asks for. If a Markdown file you open references
a remote image URL (for example
), the app fetches that image — because your document asked for it. That request goes to whatever host the document names. It never goes to us, and we never see it. - Links you click. Clicking a link in a document opens it in your default web browser, the same as clicking a link anywhere else on your Mac.
Outside of these two document-initiated cases, the app makes no network requests.
Mermaid diagrams render fully offline
The mermaid diagram engine is bundled inside the app itself — there is no CDN and no network call to render a diagram. A rendered diagram is cached on your own Mac, in its temporary folder, so it doesn't need to be rendered again. That cache never leaves your machine.
Mac App Store build and folder access
The Mac App Store build of Fast Markdown Reader is sandboxed, as Apple requires. It can only reach files and folders you pick yourself, and it asks for read and write access to them: read so it can show a document and its local images, write so that an edit you make can be saved back to your file. If you grant it access to a folder, that permission is stored on your Mac as a macOS security-scoped bookmark. It stays on your device and is never transmitted to us or to anyone else.
No personal data processing
Because the app collects nothing, there is no personal data for us to process, store, or share — no cookies, no tracking identifiers, no advertising. We have nothing to disclose beyond what's on this page.
Changes to this policy
If this policy ever changes, we'll update the effective date above and the change will be reflected in the app's GitHub repository history.
Contact
Questions about this policy: biz@ww-w.ai. Bugs and feature requests: GitHub Issues.