// 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.
Three built-in themes — Dark, Light, and High Contrast — instantly switchable from the header. Monaco editor theme syncs automatically with your selection.
Organize your project with a hierarchical file tree. Use folder/file.js naming to automatically group files into collapsible folder nodes in the sidebar.
Alpanzo Deep and R8 expose their thinking process in collapsible <think> blocks rendered live as the response streams in.
A quick-access symbol keyboard, collapsible file sidebar, floating AI button with first-use tooltip, 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) |
| Word Wrap | Toggle word wrap on/off via toolbar or Alt+Z |
| Font Zoom | Increase or decrease editor font size (10px–24px) from the toolbar |
| Go to Line | Jump directly to any line number via the toolbar or Ctrl+G prompt |
| Auto-Save | Saves to localStorage automatically on every keystroke (800ms debounce) |
The AI panel has full context of your open file and maintains a rolling conversation history of the last 10 turns. Choose your model from the dropdown, then use quick action buttons or chat freely. All responses stream in real time with Markdown and code block rendering.
| Model | Endpoint | Best For |
|---|---|---|
| Alpanzo | /api/chat | Fast completions, quick edits, simple questions |
| Alpanzo Deep | /api/deep | Complex refactoring, architecture, multi-step reasoning (default) |
| Alpanzo R8 | /api/r8 | Advanced analysis, algorithmic problems, deep explanation |
Quick action buttons in the AI panel:
| Action | Description |
|---|---|
| Review | Review code for best practices, potential bugs, and security issues |
| Explain | Plain-English explanation of what your code does, step by step |
| Debug & Fix | Identify bugs and return a corrected version — uses last Error Lens error if available |
| Review Diff | Any AI suggestion containing code opens in the diff viewer for safe inspection before applying |
| Apply to Editor | Replace editor contents with the AI-suggested code in one click |
| Stop Generation | Cancel an in-progress AI response at any time with the ■ button |
The AI panel also renders reasoning blocks — when Alpanzo Deep or R8 exposes a <think> tag, it appears as a collapsible "Thinking Process" detail block that pulses while still streaming, then collapses when complete.
Three powerful AI-powered editor tools accessible from the editor toolbar or menus — these go beyond chat to directly transform your code.
| Tool | How It Works |
|---|---|
| AI Write | Opens a prompt modal. Describe what you want to build and the AI generates a complete file from scratch in the current language, replacing the editor contents. |
| AI Format | Reformats the current file to enforce best practices, clean indentation, and idiomatic patterns for the selected language. Triggered via ShiftAltF. |
| Convert Language | Opens a language picker grid. Select a target language and the AI rewrites the code using idiomatic patterns. The result is saved as a new file tab (e.g. converted.py). |
All three tools show an editor overlay with animated loading dots while the AI is working. If the response contains a code block, only the code is extracted and applied — no markdown artifacts left in the editor.
The file sidebar renders a live tree view of your project. Files are automatically grouped into folder nodes based on their name — no separate folder creation step needed.
components/Button.jsx and the sidebar will automatically create a components/ folder node containing it.Files are sorted alphabetically within each folder, with folder nodes always listed above files.
Aquarius Coder auto-saves everything to localStorage on every keystroke. For portable exports, two download options are available.
| Method | Description |
|---|---|
| Single File Download | Click the download icon next to any file in the sidebar to save it as a plain text file with the correct extension. |
| Download ZIP | Downloads all project files as a aquarius_project.zip archive. Accessible via the "⋯ More Actions" menu or the mobile actions menu. Powered by JSZip. |
| Duplicate File | Creates an in-editor copy of any file with _copy appended to the filename, switchable instantly. |
Switch between three full-IDE themes from the sun/moon icon in the header. Your selection is remembered across sessions via localStorage.
Theme changes apply across all UI surfaces simultaneously — the sidebar, panels, modals, status bar, and Monaco editor all update together.
Aquarius Coder supports standard Monaco shortcuts plus custom global shortcuts for key IDE actions. The chat input supports command history navigation with ↑ and ↓.
On mobile, a quick-key toolbar provides instant access to common symbols: ( ) { } [ ] ; = " '
Aquarius Coder connects to Sagittarius1-managed Cloudflare Worker endpoints for AI inference and authentication. All requests use session-based authentication managed by session.js.
All chat endpoints accept a history array (last 10 turns) and a prompt string that includes the editor's current language and file contents automatically. Streaming responses are parsed as SSE — each data: line is decoded as a JSON delta chunk.
All Monaco-compatible languages with full syntax highlighting and IntelliSense where available. Language is auto-detected from the file extension when a file is renamed or created.
Extension auto-detection mappings: .js → javascript, .py → python, .rs → rust, and 15 more. Switching language from the picker also auto-renames the active file's extension.
Aquarius Coder is a fully compliant PWA with a registered Service Worker. You can install it to your device's home screen and use the editor entirely without a network connection.
| Feature | Details |
|---|---|
| Install Prompt | An install button appears in the header when your browser detects the PWA is installable. Tap to add it to your home screen or desktop. |
| Service Worker | Registered at /sw.js with scope /. Handles offline caching of IDE assets automatically. |
| Auto-Update | An update banner appears when a new version of the SW is detected. Click "Update" to reload to the latest build without losing your work. |
| Persistent Files | All files and settings survive offline sessions — stored in localStorage and rehydrated on every load. |
| Theme Color | Native OS chrome tinted to #00d4c8 when launched in standalone mode. |
A running log of features shipped, improvements made, and issues resolved across each Aquarius Coder release.
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 with background session validation. Credentials are never stored in plaintext and sessions are re-verified on every load.
Files, settings, and theme preferences are saved to localStorage automatically. 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. Sagittarius1 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.