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 user@example.com	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 / query hako index
lv --reindex	build SQLite index from hako/
lv --tag sql	search hako by tag
lv --stats	show hako index statistics
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