Timestamp Converter Free Online
Convert Unix timestamps to human-readable dates and back. Live current time, ISO 8601, relative display, and local timezone. Runs entirely in your browser.
Current Unix Timestamp (seconds)
—
Milliseconds: —
Unix Timestamp → Human Date
Human Date → Unix Timestamp
Pro — timezone selector, batch conversion, API access
API access · Priority queue · Team workspace
How It Works
View Live Time
The current Unix timestamp in seconds and milliseconds updates every second at the top of the tool. Click "Use Now" to load it into the converter automatically.
Convert Either Way
Paste a Unix timestamp (seconds or milliseconds) to get ISO 8601, local time, relative, day-of-week, and short format. Or pick a date/time to get the corresponding timestamp.
Copy Any Format
Click Copy next to any output — ISO 8601 for APIs, local time for logs, relative for UIs, or Unix seconds/ms for code. Each result is instantly ready to paste.
Timestamp Converter Features
Live clock, bi-directional conversion, and multiple output formats
Live Clock
Real-time Unix timestamp counter in seconds and milliseconds, updated every second — always accurate to your system clock.
Bi-Directional
Convert timestamp → date or date → timestamp in the same tool. Both directions produce clean, copyable results.
UTC & Local
Both UTC/ISO 8601 and your browser's local timezone are shown side by side for each conversion result.
Relative Time
"3 days ago" or "in 2 hours" — human-friendly relative time display for quick comprehension of how old or future a timestamp is.
Seconds & Milliseconds
Switch between second-precision and millisecond-precision with the unit selector — useful for different APIs and logging formats.
Fully Offline
All logic runs in your browser's JavaScript engine. No data is transmitted to any server — safe for confidential timestamps.
Free vs Pro
| Feature | Free | Pro |
|---|---|---|
| Timestamp ↔ date | ||
| Live current timestamp | ||
| Relative time display | ||
| Timezone selection | — | |
| Batch file conversion | — | |
| REST API access | — |
Frequently Asked Questions
A Unix timestamp is the number of seconds (or milliseconds) elapsed since the Unix Epoch — January 1, 1970 00:00:00 UTC. It is used universally in programming to represent dates and times as a single integer, independent of timezone.
Yes. Use the unit selector next to the input field to switch between second-precision and millisecond-precision timestamps. Both formats are supported for input and output.
The tool always shows UTC/ISO 8601 and your browser's local timezone side by side. Explicit timezone selection (e.g. America/New_York, Europe/London) is available in the Pro plan.
ISO 8601 is an international standard for date/time representation, e.g. 2024-11-14T22:13:20.000Z. It is unambiguous, sortable, and supported across virtually every programming language, database, and API.
Relative time shows how long ago or how far into the future a timestamp is compared to right now — for example "3 days ago" or "in 2 hours". It's ideal for displaying log entry ages or event countdowns in UIs.
No. All conversions happen in JavaScript in your browser using the native Date object. Nothing is transmitted anywhere — safe for private timestamps from internal systems or audit logs.