The local-first, markdown & PDF studio for developers.
Write clean markdown, generate pixel-perfect A4 documents, and format notes inside a sandboxed client environment. No tracking, no vendor lock-in.
Markdown PDF Studio
Write in Markdown and preview instantly.
đź“ť Note: Your data never leaves your device.
Features
- Fast and local-first
- HTML5 & PDF output
A Better Way to Write
Everything you need for clean documents, offline and secure.
Supports GitHub-flavored markdown, KaTeX math symbols, emojis, and custom containers like alerts and collapsibles.
Preview documents with precise A4 height indicators and inject custom page breaks to guarantee beautiful PDF print outs.
No servers, no tracking. The app loads instantly, runs completely client-side in the browser, and saves all data locally.
Upload local images directly into your workspace. They are compressed, stored in IndexedDB, and resolved instantly in live preview.
Features a robust Markdown editor core, including syntax highlighting, bracket matching, slash command overlays, and stable line wrapping.
A built-in debounced save listener automatically stores your active document to local IndexedDB on every keystroke.
Why Open Source & Local-First?
We believe developers deserve tools that respect their independence. Manus runs entirely in your browser’s sandbox, using your local storage as a database.
Full Privacy Audit
Anyone can inspect the code to verify that no documents or analytics are transmitted to remote servers.
No Vendor Lock-in
Your data is stored in standard Markdown and IndexedDB structures. Export your notes in bulk at any moment.
Community Driven Development
Found a bug? Want a feature? Fork the repository and open a pull request. We actively review contributions.
A Studio Designed for Developer Workflows.
Streamlined Document Lifecycles
Create
Launch a new sandbox container instantly with a single click. No accounts or registrations required.
Write
Draft documents using CodeMirror's syntax highlighting, editor commands, and live rendering.
Structure
Insert interactive Callouts, custom Collapse accordions, Page Breaks, and Badges using Slash command overlays.
Auto-Save
Work with confidence. Your changes are automatically debounced and saved locally to IndexedDB.
Export
Print pixel-perfect PDFs with pre-configured A4 margins or copy sanitized HTML to your clipboard.
Loved by Developers
Aaditya Pal
Senior Frontend Engineer
Open for Collaboration
Manus is shaped by developer feedback. Contribute to security improvements, style templates, or code cleanups directly on GitHub.
Found a rendering bug or want a new markdown extension? Open a GitHub issue, and our contributors will review it.
Want to implement a new feature? We love contributions. Fork the codebase, modify it, and open a pull request.
Share your custom markdown styles, document templates, or suggest architectural upgrades in our community hub.
Frequently Asked Questions
Ready to write beautiful, secure documents?
Manus is completely free, runs client-side in your browser, and auto-saves your changes to local storage. Give it a star or open the editor to start coding.