I work across Bangkok, San Francisco, New York, and London. Every day I need to coordinate meetings across these timezones. Going to Google and typing "what time is 3pm SF in Bangkok" is slow — the results page loads, I click through, sometimes the AI answer helps but it takes seconds to think. I just want to type and see the answer instantly.
TimeZoner is a tiny macOS app that floats over everything. Type a time, see it in all your zones. That's it.
Docked to the menu bar
Floating, with the timezone map open
Download the latest DMG (~440KB, Apple Silicon)
Open the DMG, drag to Applications, right-click → Open on first launch. Requires macOS 14+ (Sonoma) on Apple Silicon (M1/M2/M3/M4/M5).
Just start typing. The chat field is focused when the app opens. Type a time and a city, hit Enter.
3pm SF → all cards update
11:30am bangkok → all cards update
15:00 BKK → 24-hour format works too
noon NYC → special words work
1130am BKK in SF → sets Bangkok time, highlights both cards
3pm london in tokyo → see what London afternoon is in Tokyo
11:30 → updates whichever card was last edited
3pm → first card is your "home" zone by default
+Tokyo → adds a Tokyo card
add Hong Kong → adds Hong Kong
-SF → removes SF
remove Europe → removes Europe
There's a world map below the cards. Your zones show up as highlighted bands with city dots. Hover any region to see the GMT offset, click to add it as a new card. The boundaries follow real timezone lines (not straight vertical stripes), so half-hour zones like India and Nepal show up correctly. Collapse it if you don't need it.
Click any time on a card and start typing. All other cards update live as you type. Type 12 and it becomes 12:00. Type 3pm and it becomes 15:00. Hit Enter or click away to finish.
Hover a card and a small pill appears at the top. Grab it and drag left or right to rearrange your zones.
The app starts right below your menu bar with a clean flat top. Drag it down to use it as a floating widget anywhere on screen. It remembers where you put it between launches.
TimeZoner floats over all windows. Click the clock icon in your menu bar to show/hide it. Escape to dismiss.
376 built-in timezone aliases — cities, abbreviations (SF, NYC, HK, BKK), airport codes (SFO, JFK, LHR), country names. No network, no API keys, no accounts.
The parser handles messy typing. All of these work:
| Input | What it does |
|---|---|
11:30am SF |
Standard format |
1130 am sf |
No colon, lowercase |
1130 a BKK |
Just "a" for AM |
3 p sf |
Just "p" for PM |
11:30 a.m. NYC |
Dotted AM/PM |
15:00 BKK |
24-hour |
noon NYC |
Special words |
midnight CET |
Midnight |
1130am BKK in SF |
Cross-zone query |
+Tokyo |
Add zone |
-SF |
Remove zone |
12 |
Bare time → active zone |
If you use Raycast, TimeZoner works there too. Type tz 3pm SF and get conversions across your zones.
| Command | Keyword | What it does |
|---|---|---|
| Convert Time | tz |
Type a time + city, see it in all your zones |
| World Clock | wc |
Current time in all your zones |
Uses the same 376 timezone aliases as the macOS app.
git clone https://github.com/nembal/Timezoner.git
cd Timezoner/raycast
npm install
npm run devOpen Raycast, type tz 3pm SF.
You can also import it manually: Raycast → Settings → Extensions →
+→ Import Extension → select theraycast/directory.
git clone https://github.com/nembal/Timezoner.git
cd Timezoner
./build.sh
open app/TimeZoner.appCreate a DMG: ./scripts/create-dmg.sh 0.1.0
Run tests: cd app && swift run TimeZonerTests
- SwiftUI + AppKit — borderless floating NSPanel
- Swift Package Manager — no Xcode project needed
- macOS 14+ — Observation framework (
@Observable) - Zero dependencies — no network, no external packages
MIT — see LICENSE.