GitHub - davidesantangelo/numla: The notepad that thinks in numbers.

Numla

The notepad that thinks in numbers.

A minimal calculator notepad for quick math, currency conversions, percentages, unit conversions, and everyday calculations. Type naturally — Numla figures out the rest.

🔒 100% Private — Everything stays in your browser. No accounts, no tracking, works offline.

Quick Examples

Rent: $1.200
Utilities: $150
Groceries: $400
sum                    → $1.750

$500 in EUR            → € 460
20% of 150             → 30
15% off $80            → $ 68

time in Tokyo          → 11:30 PM JST
5 km to miles          → 3.1 miles

$RATE = 75
8 hours * $RATE        → 600 hours

Features

Feature	How
Tabs	Open multiple notes, click `+` to create new
Search	`⌘K` to find any note instantly
Time Machine	`⌘E` or click clock icon to browse history
Focus Mode	Click expand icon, `Esc` to exit
Theme	Each note remembers light/dark preference
Export	Download notes as `.txt`

⏰ Time Machine

Never lose your work again! Time Machine automatically saves snapshots of your notes as you type.

How it works:

🕐 Automatic snapshots — Saves versions as you make changes
📅 Full timestamps — See exactly when each version was created
👀 Preview before restore — View the complete content before restoring
⌨️ Keyboard navigation — Use ← → arrows to browse versions
🔄 One-click restore — Instantly restore any previous version

Open Time Machine:

Press ⌘E (Mac) / Ctrl+E (Windows)
Or click the clock icon in the toolbar

📱 PWA & Offline Support

Numla is a Progressive Web App (PWA), meaning you can install it on your device and use it offline.

Installable: Look for the install icon in your browser's address bar (Chrome/Edge) or "Add to Home Screen" (Safari).
Offline Ready: Works 100% offline. Load it once, and it works everywhere, even without internet.
Fast: Caches essential files for instant loading times.

Syntax Reference

Operators

plus minus times divided by — or use + - * /

Percentages

20% of 50 → 10
10% on $100 → $110 (add)
25% off $80 → $60 (subtract)
25 as a % of 100 → 25

Scales

k = thousands, M = millions, billion

Special Keywords

sum total avg mean prev

Comments

# Header (yellow)
// Ignored line
Price: $10    ← Labels stripped

Math Functions

Category	Functions
Stats	`mean` `median` `std` `variance` `min` `max` `mode` `sum`
Math	`sqrt` `cbrt` `pow` `exp` `log` `log10` `log2`
Trig	`sin` `cos` `tan` `asin` `acos` `atan`
Round	`round` `floor` `ceil` `abs`
Combinatorics	`factorial` `combinations` `permutations` `gcd` `lcm`
Random	`random()` `randomInt(min, max)`
Constants	`pi` `e` `phi` `tau`

Shortcuts

Key	Action
`⌘J`	New note
`⌘K`	Search
`⌘E`	Time Machine (history)
`←/→`	Navigate versions (in TM)
`Esc`	Close / Exit focus

Currencies & Timezones

50+ currencies with live rates: USD, EUR, GBP, JPY, CHF, and many more.

Major cities: New York, London, Tokyo, Sydney, and timezone codes (EST, PST, GMT, etc.)

Development

npm install && npm run dev

MIT — Made with ♥ for people who think in numbers.