MTools

A privacy-first developer toolkit that runs entirely in your browser. No accounts, no cloud sync, no telemetry - just tools that work.

Highlights

• 8 productivity tools in one unified interface
• 100% local storage - all data stays in your browser (IndexedDB)
• Vim-style navigation - leader key system for keyboard-driven workflows
• No account required - start using immediately, no sign-up needed
• Encrypted secrets - database passwords and credentials encrypted at rest
• Dark/Light/System themes - seamless theme switching across all tools

Overview

MTools consolidates essential developer utilities into a single, self-hosted web application. Instead of juggling between Postman, database GUIs, password managers, and note-taking apps, MTools brings them together with a consistent interface and keyboard-first design.

Built for developers who value:

• Privacy and data ownership
• Keyboard-driven workflows
• Minimal, focused interfaces
• Self-hosted solutions

Try it now: mtools-rho.vercel.app

Features

Development Tools

API Client

A Postman alternative for testing REST APIs:

• HTTP methods: GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS
• Request builder with query params, headers, and JSON body (Monaco editor)
• Organize requests into collections and folders
• Collection-level authentication (Bearer, Basic, API Key)
• Request history (last 100 requests)
• Built-in CORS proxy for testing external APIs

Database Viewer

Browse and query databases directly from the browser:

• PostgreSQL, MySQL, and MariaDB support
• SSH tunneling for secure connections
• Table browser with row counts and schema visualization
• Data viewer with pagination, sorting, and filtering
• SQL query editor with syntax highlighting and history
• Encrypted credential storage

Productivity

Tasks

Kanban-style task board:

• Five columns: Inbox, Todo, Doing, Done, Archived
• Drag & drop reordering
• Quick capture via command menu

Notes

Markdown note-taking:

• Monaco-based editor with live preview
• Auto-save after 3 seconds of inactivity
• Organize into collections and folders
• Full-text search

Whiteboard

Excalidraw-powered drawing canvas:

• Shapes, arrows, text, freehand drawing
• Auto-save as you draw
• Theme-synced canvas (light/dark)
• Organize into collections

Organization

Bookmarks

Link manager with categories:

• Custom categories with drag & drop reordering
• Auto-fetched favicons
• Search by title, URL, or description
• Import/Export as JSON

Excel Viewer

Client-side spreadsheet viewer:

• Supports .xlsx, .xls, .xlsm
• Web Worker parsing (non-blocking)
• Multi-sheet navigation

Security

KeePass Manager

Password manager for .kdbx files:

• KeePass v2/v4 support with Argon2
• Key file two-factor authentication
• Quick unlock with PIN
• Auto-clearing clipboard (30 seconds)
• Auto-lock after 30 minutes of inactivity
• All decryption happens client-side

Keyboard Shortcuts

MTools uses a leader key system inspired by Vim. Press Space to activate leader mode, then press a key to execute an action.

Navigation

Context-Aware

Installation

# Clone the repository
git clone https://github.com/YannickHerrero/mtools.git
cd mtools

# Install dependencies
pnpm install

# Run development server
pnpm dev

Open http://localhost:5175 to access MTools.

Environment Variables

For database connections with encrypted credentials:

DATABASE_ENCRYPTION_KEY=your-32-byte-hex-key

Tech Stack

Privacy

MTools is designed with privacy as a core principle:

• Local-first: All data stored in browser IndexedDB
• No telemetry: Zero tracking or analytics
• No accounts: No sign-up, no cloud sync
• Encrypted secrets: Database passwords encrypted with AES-GCM
• Client-side crypto: KeePass decryption happens entirely in your browser

The only network requests made are:

1. Your actual API requests (through the CORS proxy)
2. Database queries (to your own databases)
3. Favicon fetches for bookmarks

Contributing

Contributions are welcome! Feel free to:

• Open an issue for bugs or feature requests
• Submit a pull request

License

MIT