Life & fun · alternatives · 2026

24 alternatives to Just right and light-weight date time library for JavaScript

Light-weight, type-safe, immutable and chainable without dependencies. Handles UTC (default) and the local time of the environment, ambiguous daylight saving time strictly.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
Fast 2kB date library alternative to Moment.js with the same API▲122
⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API - iamkun/dayjs
2018 · github.com · its alternatives →
2
I made a tool to compare time zones▲758
Timezone converter and world clock by time.fyi is a simple, fast and easy to use app to convert timezones and check the current time in different cities around the world.
2024 · time.fyi · its alternatives →
3
Moment.js▲279
Parse, validate, manipulate, and display dates in JavaScript
2015 · momentjs.com · its alternatives →
4TJ
Tzintl.js – International Date-Time Conversion▲56
TZIntl.js is a light-weight international date-time conversion library.
2021 · masswerk.at · its alternatives →
5
UTC Time▲112
Show the time in UTC in the menu bar or a widget
2021 · apps.apple.com · its alternatives →
6
Timezone.io▲355
Keep track where and when your team is.
2016 · timezone.io · its alternatives →
7
dateDropper Javascript▲156
The lightest and the most complete javascript date picker
2021 · felixg.io · its alternatives →
8
Day.js▲10
2KB immutable date time library alternative to Moment
2018 · github.com · its alternatives →
9
Whatime▲96
Timezone-friendly scheduling, made easy and intuitive
2023 · whati.me · its alternatives →
10
Combining UTC and local times (time zones) in one new clock▲101
2021 · thehtime.com · its alternatives →
11
SavvyCal Time Zone API▲221
Never have to debug time zone insanity again
2022 · savvycal.com · its alternatives →
12
My Time Zone▲382
Automatic time zone conversion tool
2017 · its alternatives →
13NT
New time and daylight application▲150
2016 · chronozone.xyz · its alternatives →
14
Time.is▲82
Exact time for any time zone
2014 · time.is · its alternatives →
15
UTC Time - live clock, ISO 8601, Unix timestamp▲26
Live UTC clock with one-click copy for ISO 8601, RFC 3339, RFC 2822 and Unix time, a device clock-skew check, and get-the-time-now code for 14 languages. Dark, fast, no signup.
Aug 2026 · utctime.app · its alternatives →
16
hTime▲81
A new clock to eliminate time zone calculations
2020 · thehtime.com · its alternatives →
17
Paste A Date▲83
Quickly convert timestamps into other timezones
2017 · its alternatives →
18
Summarize your time availability in seconds▲109
Simple tool to share your availability as plain text. Select time slots, convert timezones, copy and send. No calendar links needed.
2020 · whattime.today · its alternatives →
19
FIO - Figure it Out for Chrome▲107
Manage and instantly view time zones for locations in Chrome
2014 · skillstech.org · its alternatives →
20
Team Time Zone▲140
Local clocks for distributed teams who use Slack
2015 · teamtime.zone · its alternatives →
21
Time Zones API▲83
Highly performant, global, point on earth to timezone API
2022 · timezonesapi.com · its alternatives →
22
Time Travel: World Clocks▲139
Effortlessly track and sync global timezones
2024 · play.google.com · its alternatives →
23
Clocker▲114
Keep track of people in different time zones
2017 · apps.apple.com · its alternatives →
24
Nomad Time▲104
A friendly time zone converter
2021 · nomadtime.app · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →