Unix Timestamp Converter Developer
Convert between Unix timestamps and human-readable dates, both ways.
Unix Timestamp Converter is a free online tool that convert between Unix timestamps and human-readable dates, both ways. It runs entirely in your web browser using plain JavaScript, so files are processed on your own device and never uploaded to a server. There is no sign-up, no file size limit imposed by the site, no watermark and no paid tier.
- Price
- Free — no account, no quota, no watermark
- Category
- Developer
- Where it runs
- In your browser, on your device
- Files uploaded
- None
- Technology
- plain JavaScript
- Settings
- 2
- Works offline
- Yes, after the first visit
About Unix Timestamp Converter
Unix Timestamp Converter is one of 43 developer tools on DuckyTools, and like all of them it runs entirely inside this page. Convert between Unix timestamps and human-readable dates, both ways.
How to use it
- Enter unix timestamp and or a date.
- Results update the moment anything changes.
The 2 settings
| Setting | What it does | Default |
|---|---|---|
| Unix timestamp | For example: e.g. 1700000000 | — |
| Or a date | For example: e.g. 2026-08-01 14:30 | — |
Under the hood
| Runs on | plain JavaScript — runs the whole thing |
| Controls | Unix timestamp, Or a date |
Questions
Seconds or milliseconds?
Unix time is defined in seconds, but JavaScript, Java and many APIs use milliseconds. This tool detects which you pasted by magnitude — anything above about 100 billion is treated as milliseconds — and tells you which it assumed.
What is the 2038 problem?
Systems storing Unix time in a signed 32-bit integer overflow on 19 January 2038 and wrap to 1901. Modern 64-bit systems are unaffected; some embedded and legacy software still is not.
Why does the local time not match my colleague's?
Because a Unix timestamp is a fixed moment in UTC, and each of you renders it in your own timezone. The UTC line in the table is the one to quote in a bug report.