mon[tab]

Dev tools in your address bar & terminal. Type mon — get results.

by moncface

Install

CLI

npm install -g mon-tab
mon uuid
mon --version
echo "b64 hello" | mon

Chrome Extension

1. Clone this repo
2. Open chrome://extensions → Enable Developer Mode → Load unpacked → select this folder

Type mon in the address bar, press Tab, enter a command. Press Enter to copy the result.

Commands

| Command | Result | |---|---| | uuid | 550e8400-e29b-41d4-a716-... | | pw | Xk#9mP2@vL5q!... (16 chars) | | pw 32 an | 32-char alphanumeric password | | sha hello | 2cf24dba5fb0a30e... (SHA-256) | | b64 hello | aGVsbG8= | | b64d aGVsbG8= | hello | | jwt <token> | decoded payload (JSON) | | ts | 1741000000 (unix timestamp) | | now | 2026-03-04T14:30:00.000Z | | upper hello world | HELLO WORLD | | lower HELLO | hello | | slug Hello World! | hello-world | | camel hello-world | helloWorld | | snake helloWorld | hello_world | | cal 2026-03-15 | Sunday, March 15, 2026 | | age 1990-05-01 | 35 years old | | lorem | Lorem ipsum sentence | | wc hello world | 2 words, 11 chars | | calc 1920/1080 | 1920/1080 = 1.777777778 | | calc sqrt(144) | sqrt(144) = 12 | | calc 2 inch to cm | 5.08 cm (CLI, via math.js) | | px 24 | 1.5rem | | ascii A | 65 | | http 404 | 404 Not Found | | port 443 | 443 — HTTPS | | mime png | png → image/png | | chmod 755 | rwxr-xr-x | | cc JP | Japan / JPY / +81 | | tel +81 | +81 — Japan | | zip 150-0001 | 東京都渋谷区神宮前 | | rand | 0.7382... (0–1) | | rand 1 6 | 3 (dice roll) | | em fire | 🔥 | | em feat | ✨ (Gitmoji) | | ratio 16 9 1920 | 1080 | | rx /[0-9]+/g abc123 | 2 matches: "123" @3, ... | | json {"a":1} | formatted + validated JSON | | url https://x.com/p?q=1 | parsed URL components | | email [email protected] | Valid / Invalid | | ip 192.168.1.1 | IPv4 info (class, scope) | | sv 1.2.3 2.0.0 | 1.2.3 < 2.0.0 | | rem 30m review PR | reminder in 30 min (Chrome) | | rem ls | list active reminders | | m w 1920 | set variable w = 1920 | | calc mw * 2 | 1920 * 2 = 3840 | | ld | .lndf distillation (project snapshot) | | lv | show .lndf state | | lc | distillation + clipboard copy | | lp create myproj | create source collection project | | lp add myproj file | add source to project | | lp view myproj | list sources with preview | | lp dump myproj | concatenate all sources | | lp list | list all projects | | ? | list all commands |

Project Structure

mon-tab/
├── commands/       ← shared commands (1 file = 1 command)
├── core/           ← shared core (runner.js)
├── cli/bin/        ← CLI entry point (npm bin)
├── skills/lndf/    ← SKILL.md for AI tools
├── chrome/         ← Chrome-specific UI
├── icons/          ← extension icons
└── manifest.json   ← Chrome extension manifest

CLI wrapper: mon-cli.

See CONTRIBUTING.md for how to add commands.

Why

Opening a new tab to generate a UUID, encode base64, or look up an HTTP status code is friction you don't need. mon[tab] puts the tools where you already are — Chrome's address bar or your terminal.

Roadmap

70+ commands planned. See ISSUE_ROADMAP.md.

Privacy

All commands run locally in your browser. No data is collected or sent to external servers — except zip, which queries a postal code API (zipcloud.ibsnet.co.jp) with the code you enter. No analytics, no tracking, no accounts.

Support

If mon[tab] saves you time:

• Buy Me a Coffee

License

MIT