About MarkSight
MarkSight is a free, open source markdown editor that runs entirely in your browser. It pairs a CodeMirror editor with an instantly-rendered preview, a smart formatting toolbar, keyboard shortcuts, a document outline, and Markdown, HTML, and PDF export — without accounts, subscriptions, or server-side storage.
Your documents are saved to your browser's localStorage and exports are generated client-side, so your writing never leaves your device.
Open the editor →A place to talk
MarkSight is developed in the open, and the conversation happens on GitHub:
- GitHub Discussions — ask questions, share what you're building, or propose ideas.
- GitHub Issues — report bugs and request features.
- Contributing guide — everything you need to land your first pull request.
Contributors
MarkSight is better because of the people who report bugs, suggest features, and open pull requests. Thank you!
Want to join them? Look for issues labelled good first issue.
Who's behind it
MarkSight was created and is maintained by Lara Mateo (@Rinava on GitHub), and developed together with open source contributors from around the world.
Frequently asked questions
Is MarkSight free to use?
Yes. MarkSight is completely free and open source under the MIT license. There are no accounts, subscriptions, or paid tiers — you can also fork the code on GitHub and adapt it to your needs.
Where are my documents stored?
Your documents never leave your device. MarkSight runs entirely in your browser and saves your work to localStorage automatically. There is no server-side storage and no sign-up.
What export formats does MarkSight support?
You can download your document as raw Markdown (.md), export it as a styled HTML file, print it to PDF, or preview the generated HTML in a new tab. Exports are generated client-side in your browser.
Does MarkSight support GitHub-flavored markdown and diagrams?
Yes. MarkSight supports GitHub-flavored markdown — tables, task lists, and strikethrough — plus syntax-highlighted code blocks and Mermaid diagrams that render live in the preview and in exports.
How do I report a bug or suggest a feature?
Open an issue on the MarkSight GitHub repository for bugs and feature requests, or start a thread in GitHub Discussions for questions and ideas. Pull requests are welcome too.
Who makes MarkSight?
MarkSight was created and is maintained by Lara Mateo, together with open source contributors from the community. Anyone can contribute on GitHub.