Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Support for seconds and milliseconds with timezone conversion and multiple date formats.
Conversion Settings
Current Timestamp
Date/Time Results
Date/time formats will appear here
Enter a timestamp and click "Convert" to start
About Unix Timestamps
- • Unix timestamp represents seconds/milliseconds since January 1, 1970 UTC
- • Seconds format: 10 digits (e.g., 1640995200)
- • Milliseconds format: 13 digits (e.g., 1640995200000)
- • Widely used in programming, databases, and APIs for date/time storage
About Unix Timestamp Converter
A Unix timestamp converter is a specialized tool that transforms Unix time values (the number of seconds since January 1, 1970, UTC) into human-readable date and time formats, and vice versa. This essential utility handles both seconds and milliseconds precision while supporting timezone conversions and multiple date formatting options for seamless time data processing.
Why use a Unix Timestamp Converter?
Unix timestamps are widely used in programming, databases, and system logs, but they're difficult for humans to interpret without conversion. This tool eliminates the need for manual calculations or complex code, providing instant, accurate conversions that save time and prevent errors in development, debugging, and data analysis tasks.
Who is it for?
This tool is perfect for software developers, database administrators, system administrators, data analysts, and IT professionals who regularly work with Unix timestamps in logs, APIs, databases, or system monitoring. It's also valuable for students learning programming concepts and anyone dealing with time-based data in technical environments.
How to use the tool
Enter your Unix timestamp (in seconds or milliseconds) in the input field, or paste a human-readable date
Select your preferred timezone from the dropdown menu for accurate local time conversion
Choose your desired output format from the available date format options
Click convert to see the instant transformation between Unix time and readable date formats
Copy the converted result for use in your applications, databases, or documentation
Frequently Asked Questions
How do I convert a Unix timestamp to a date?
Paste the Unix timestamp (seconds since 1970-01-01 UTC) and the tool displays the matching date in UTC and your local timezone. Auto-detects whether you entered seconds (10 digits) or milliseconds (13 digits — typical in JavaScript). For the reverse direction, enter a date and timezone; the tool outputs the matching Unix timestamp. Runs entirely in your browser — values never leave the device. Useful for debugging logs, database records, and API responses where timestamps appear in raw integer form.
What is a Unix timestamp?
A Unix timestamp is the count of seconds that have elapsed since 1970-01-01 00:00:00 UTC (the 'Unix epoch'). It's a single integer representing any moment in time. As of 2026, current Unix timestamps are around 1.77 × 10⁹. Negative values represent times before 1970. Unix timestamps are timezone-independent (always counted from UTC), language-independent (every OS uses them internally), and unambiguous — making them the canonical way to store moments in time in databases and APIs.
Does this handle timezones and DST?
The timestamp itself is timezone-independent — it's a UTC count. The display side does timezone conversion. The tool offers UTC, your local browser timezone, and any IANA timezone you select. DST is handled correctly by named IANA zones (e.g., 'America/New_York' automatically applies EDT in summer, EST in winter). Fixed UTC offsets (e.g., 'UTC-5') do NOT shift with DST. For dates around DST transitions, the named zone gives the correct local time; the fixed offset doesn't.
What about the Year 2038 problem?
Systems using a signed 32-bit integer for Unix timestamps will overflow on 19 January 2038 at 03:14:07 UTC (when timestamps exceed 2³¹). Modern systems use 64-bit time_t — good for billions of years. Vulnerable: embedded systems, old databases, certain 32-bit ABIs, file formats with 32-bit time fields. Audit your stack: any time_t in a 32-bit struct or 32-bit database field is a candidate. This tool handles 64-bit timestamps natively — you can convert dates far past 2038 without issue.
Why does my JavaScript timestamp have 13 digits instead of 10?
JavaScript's `Date.now()` returns milliseconds since the epoch (13 digits in 2026), not seconds (10 digits). Most other languages return seconds: Python's `time.time()`, PHP's `time()`, Go's `time.Now().Unix()`, Unix shell `date +%s`. Convert: divide JavaScript ms by 1000 to get seconds; multiply Unix seconds by 1000 to get JS ms. The tool auto-detects which unit you've pasted based on digit count. For sub-millisecond precision, use `performance.now()` (relative monotonic clock, not a Unix timestamp).
How do I work with timestamps in different formats?
Common formats and conversions. (1) Plain integer (`1747755000`): pure Unix seconds. (2) Float (`1747755000.123`): seconds with fractional precision. (3) Milliseconds (`1747755000000`): JavaScript convention. (4) Nanoseconds (`1747755000000000000`): some Go and high-precision systems. (5) ISO 8601 string (`2026-05-20T15:30:00Z`): standard human-readable. The tool accepts all five and converts between them. For database storage, prefer seconds or ISO 8601; for sub-millisecond logs, use nanoseconds.
Can I convert timestamps from log files in bulk?
For single timestamps, paste and convert. For bulk processing, use command-line tools: `date -u -d @1747755000` (Linux), `date -r 1747755000 -u` (macOS), or scripts in Python (`datetime.fromtimestamp(1747755000, tz=timezone.utc)`) or Node.js (`new Date(1747755000 * 1000).toISOString()`). For one-off log inspection, this tool is fast — paste each timestamp and read the result. For programmatic conversion across thousands of timestamps, scripts are more efficient.
What's the difference between Unix timestamp and ISO 8601?
Unix timestamp is a single integer (seconds since 1970 epoch) — compact, unambiguous, ideal for databases and APIs. ISO 8601 is a string format (e.g., `2026-05-20T15:30:00Z`) — human-readable, includes timezone marker. Both represent the same instant; they're different representations. Unix timestamps are faster to compare (integer vs string), more compact (8 bytes vs ~24 bytes); ISO 8601 is human-debuggable. For database columns storing instants, prefer Unix timestamps or native timestamp types; for API responses where humans inspect them, ISO 8601 is friendlier.
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