// The IDE that thinks with you.
A premium browser-based IDE with Monaco editor, multi-file workspace, live preview, and Aquarius AI built right in — no install, no friction, no limits.
Aquarius Coder brings the power of a desktop IDE to your browser — Monaco editor, intelligent AI assistance, live preview, and a complete multi-file project manager. Zero setup, instant start.
Open Aquarius CoderEvery feature is purpose-built for productivity. No bloat, no friction — just the tools that matter when you're in the zone.
Instant side-by-side rendering for HTML, CSS, and JavaScript as you type. Resizable pane with debounced updates — see changes in real time without lifting a finger.
Run JavaScript, HTML, CSS, Python (via Pyodide), and SQL (via AlaSQL) in an isolated output window. Full console capture with error reporting and line highlighting.
When AI suggests a fix, review it in a side-by-side Monaco diff editor. Apply or cancel in one click — never blindly accept AI edits again.
Errors are highlighted inline at the exact line, with the message rendered right beside the code. The AI Fix button auto-activates to resolve issues instantly.
Download your entire multi-file project as a ZIP archive with one click — or export individual files. Built on JSZip with no size limits imposed by the IDE.
A quick-access symbol keyboard, collapsible file sidebar, and full-screen preview overlay make Aquarius Coder fully usable on any touch device.
Everything you need to get productive fast — from first keypress to AI-assisted refactoring, all documented here.
Aquarius Coder runs entirely in the browser — no installation required. Open it, sign in, and you're writing code with full AI assistance within moments.
Powered by Monaco Editor — the engine behind VS Code. All its power, directly in the browser with the custom Aquarius dark theme.
| Feature | Description |
|---|---|
| Syntax Highlighting | Custom Aquarius theme with full token colorization for all supported languages |
| IntelliSense | Auto-completion, parameter hints, and hover documentation inline |
| Error Lens | Inline error display at exact line with AI Fix button activation |
| Diff View | Side-by-side Monaco diff editor for reviewing AI suggestions safely |
| Multi-File Tabs | Unlimited files with persistent localStorage state and auto-save |
| Find & Replace | Full regex-capable find/replace panel (Ctrl+F) |
The AI panel has full context of your open file. Use quick action buttons or chat freely. All responses stream in real time with Markdown and code block rendering.
| Action | Description |
|---|---|
| Suggest | Continue your code with 10+ logically appropriate lines |
| Debug | Identify bugs and receive a corrected version of the file |
| Optimize | Refactor for performance and readability improvements |
| Explain | Plain-English explanation of what your code does |
| Auto Fix | Context-aware fix using the last detected error from Error Lens |
| Review Diff | Any code suggestion opens in the diff viewer for safe inspection before applying |
Aquarius Coder supports standard Monaco shortcuts plus custom global shortcuts for key IDE actions.
| Shortcut | Action |
|---|---|
| F5 | Run the current file |
| Ctrl + S | Save to localStorage (auto-persisted every keystroke) |
| Ctrl + F | Open Find / Replace panel |
| Ctrl + Z / Y | Undo / Redo |
| Ctrl + / | Toggle line comment |
| Escape | Close modals, dismiss language menu |
On mobile, a quick-key toolbar provides instant access to common symbols: ( ) { } [ ] ; = " '
Aquarius Coder connects to Sagittarius-managed Cloudflare Worker endpoints for AI inference and authentication. All requests are Bearer token–authenticated.
The chat endpoint accepts a history array and injects a full system prompt with editor context automatically. Supports both SSE streaming and standard JSON responses.
All Monaco-compatible languages with full syntax highlighting and IntelliSense where available. Language is also auto-detected from the file extension on rename.
Aquarius Coder runs on Cloudflare's global edge network. Every request is routed to the nearest PoP for near-zero latency, enterprise-grade protection, and bulletproof reliability.
Every AI request, code execution, and user session is handled by Cloudflare Workers across 300+ global data centers. This isn't just a CDN — it's a security-first, serverless architecture that makes Aquarius Coder one of the fastest and most resilient browser IDEs available.
Unmetered, always-on DDoS mitigation at the network edge. The IDE stays available no matter what traffic is thrown at it.
AI requests are routed to the nearest Cloudflare PoP, delivering sub-100ms response starts for most global users.
Token-based authentication on every endpoint. Credentials are never stored in plaintext. Sessions are verified server-side on every request.
Files and settings are saved to localStorage automatically on every keystroke. Your work is never lost — even if the tab closes unexpectedly.
Aquarius Coder is a Progressive Web App with a Service Worker. Install it to your home screen and keep coding without a connection.
No tracking, no ads, no data brokers. Your code and conversations stay private. Sagittarius products are ad-free by principle.
Aquarius Coder is live, free to use, and waiting for your first keystroke. No install. No friction. Just code.