Unix Timestamp Converter
Convert unix epoch timestamps to human-readable dates and vice versa with timezone support.
Timestamp → Human Date
Human Date → Timestamp
What is a Unix Timestamp Converter?
A unix timestamp converter is an essential developer tool that translates between unix epoch time and human-readable dates. Unix timestamps (also called epoch time or POSIX time) represent the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC — the "Unix epoch." This format is used extensively in programming, databases, APIs, and log files because it's timezone-independent, easy to store, and simple to compare. However, raw timestamps like 1700000000 aren't human-friendly, which is where this epoch to date converter comes in. Our unix timestamp converter handles both seconds and milliseconds, supports multiple timezones, shows relative time ("3 hours ago"), displays a live-updating current timestamp, and runs entirely in your browser for instant results with complete privacy.
How to Use the Unix Timestamp Converter
- View the current timestamp: The live counter at the top shows the current Unix timestamp in seconds, updating every second. Click "Copy" to grab it.
- Convert timestamp to date: Enter a Unix timestamp in the "Timestamp → Human Date" section. Select whether it's in seconds or milliseconds, and choose your timezone.
- Convert date to timestamp: In the "Human Date → Timestamp" section, pick a date and optional time to get the corresponding Unix timestamp in both seconds and milliseconds.
- Copy results: Click the "Copy" button next to any result to copy it to your clipboard.
Features
- Live current timestamp: See the current Unix epoch time updating in real time every second.
- Bidirectional conversion: Convert timestamps to dates and dates back to timestamps.
- Seconds & milliseconds: Support for both second-precision and millisecond-precision timestamps (common in JavaScript and Java).
- Timezone selector: View converted dates in 14+ common timezones worldwide.
- Relative time display: See how long ago (or in the future) a timestamp is in human-friendly terms like "3 hours ago."
- ISO 8601 output: Get the standardized ISO date format alongside the localized display.
- 100% client-side: No server requests — all conversions happen in your browser.
Use Cases
- API debugging: Decode timestamps in API responses to understand when events occurred and verify date handling in your application.
- Database queries: Convert human dates to timestamps for database WHERE clauses, or decode timestamps in query results.
- Log analysis: Translate epoch timestamps in server logs and application logs to human-readable dates for debugging.
- JWT token inspection: Decode the "iat" (issued at) and "exp" (expiration) claims in JSON Web Tokens.
- Cron job scheduling: Calculate exact timestamps for scheduling tasks and verifying when cron jobs last ran.
- Cross-timezone coordination: Convert timestamps to multiple timezones to coordinate across distributed teams.
Tips & Tricks
- If your timestamp has 13 digits, it's in milliseconds (JavaScript's Date.now()). If it has 10 digits, it's in seconds.
- The Unix epoch (timestamp 0) corresponds to January 1, 1970 00:00:00 UTC — often called the "epoch."
- Negative timestamps represent dates before 1970. For example, -86400 is December 31, 1969.
- The "Year 2038 problem" affects systems storing timestamps as 32-bit signed integers, which will overflow on January 19, 2038. Modern 64-bit systems don't have this issue.
- Combine with the JSON Formatter to prettify API responses before extracting timestamps.
Unix Timestamp Converter vs Alternatives
Popular alternatives like epochconverter.com and unixtimestamp.com work well but are ad-heavy and visually dated. ToolMagic's Unix timestamp converter offers a clean, modern interface with no intrusive ads, runs 100% client-side for speed and privacy, includes relative time display alongside standard date formats, and provides a live-updating current timestamp you can copy with one click. Unlike built-in browser console methods, this tool gives you a visual interface with timezone support and doesn't require any coding knowledge.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (or epoch time) is the number of seconds elapsed since January 1, 1970 00:00:00 UTC. It's a standard way to represent time in computing that's independent of timezones and date formats.
What's the difference between seconds and milliseconds timestamps?
A seconds timestamp has ~10 digits (e.g., 1700000000), while a milliseconds timestamp has ~13 digits (e.g., 1700000000000). JavaScript and Java commonly use milliseconds; Unix/Linux systems typically use seconds.
How do I get the current Unix timestamp?
The live counter at the top of this page shows the current timestamp updating every second. You can also use Date.now()/1000 in JavaScript or date +%s in a Unix terminal.
Can I convert dates in different timezones?
Yes! Use the timezone selector when converting a timestamp to a human date. The tool supports 14+ common timezones including UTC, US time zones, European, and Asian timezones.
What happens after 2038?
The "Year 2038 problem" affects 32-bit systems that store timestamps as signed integers, overflowing on Jan 19, 2038. Most modern systems use 64-bit integers, which can handle dates billions of years into the future.
Is this tool accurate?
Yes, it uses your browser's built-in Date API which is accurate to the millisecond. Results match what you'd get from programming language date libraries.
Can I convert negative timestamps?
Yes. Negative timestamps represent dates before January 1, 1970. For example, -86400 represents December 31, 1969 at 00:00:00 UTC.
Related Tools
Explore more free developer tools on ToolMagic: use the JSON Formatter to prettify and validate JSON, the Binary Translator to convert between number systems, or the Date Duration Calculator to find the days between two dates.