Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and convert dates back to Unix time in seconds or milliseconds.
How to Use the Unix Timestamp Converter
Effortlessly convert epoch numbers and human dates in both directions:
Convert Timestamp
Paste any 10-digit (seconds) or 13-digit (milliseconds) epoch into the left box to view UTC and local dates.
Convert Date
Pick any calendar date and local time in the right box to immediately generate seconds and millisecond timestamps.
Current Time
Click "Use Current Time" to populate both panels with your real-time browser timestamp instantly.
One-Click Copy
Copy UTC strings, ISO 8601 timestamps, or numeric seconds with dedicated one-click copy buttons.
What is Unix Epoch Time?
Unix time (also called POSIX time or Epoch time) is a universal timekeeping convention that measures the continuous number of seconds that have elapsed since 00:00:00 UTC on Thursday, January 1, 1970, not counting leap seconds.
Because Unix time is independent of time zones, daylight saving transitions, and localized calendar formats, it serves as the ubiquitous standard for system logs, database indexes, JWT token expiration timestamps, and distributed API communication.
Famous Unix Timestamp Milestones
Historical and future landmark timestamps in computing history:
Timestamp: 0
UTC Date: Thursday, January 1, 1970 00:00:00 GMT
ISO 8601: 1970-01-01T00:00:00.000ZTimestamp: 1704067200
UTC Date: Monday, January 1, 2024 00:00:00 GMT
Y2K38 Max: 2147483647 (January 19, 2038 03:14:07 UTC)When Developers Use Timestamp Converters
Common software workflows requiring epoch transformations:
Debugging Server Logs
Translating raw numeric timestamps from Docker, Kubernetes, Apache, or PostgreSQL logs into human dates.
JWT Expiration Auditing
Checking exp (expiration) and iat (issued at) token claims to debug auth timeout issues.
Database Query Filters
Converting human time ranges into numeric bounds for SQL WHERE created_at >= 1704067200 filters.
Mock Data Generation
Creating realistic future expiration timestamps and past transaction times for automated integration tests.
Key Features of CodeCrate Timestamp Converter
Precision timekeeping built for engineers:
Bidirectional Conversion
Convert from timestamp to date or from date to timestamp seamlessly in a synchronized side-by-side workspace.
Seconds & Milliseconds
Automatic detection intelligently discerns 10-digit second timestamps from 13-digit millisecond values.
Explicit Timezone Labels
Eliminates ambiguity between UTC and local system times by explicitly labelling every timezone breakdown.
Real Browser Clock
Current time readings use your real hardware clock rather than fabricated, laggy server time responses.
Important Technical Notes
All Unix timestamps measure seconds relative to UTC (Coordinated Universal Time). Our converter never silently treats local dates as UTC; local calendar times are converted by evaluating your browser's exact timezone offset at the specified target moment.
The current time shown is drawn directly from your client machine's native Date clock. There are no synthetic server timers or artificial network roundtrips.
Frequently Asked Questions
Got questions about Unix epoch timestamps? Find answers below:
What is a Unix epoch timestamp?
A Unix timestamp is the total number of seconds that have elapsed since midnight Coordinated Universal Time (UTC) on January 1, 1970, minus leap seconds.
How does the tool distinguish between seconds and milliseconds?
Standard Unix timestamps in seconds are 10 digits long (e.g. 1704067200 for year 2024). JavaScript timestamps in milliseconds are 13 digits long (e.g. 1704067200000). The tool auto-detects this length or allows manual selection.
How is local timezone difference handled?
The tool displays both UTC time and your browser's local time with explicit timezone labels, preventing ambiguous interpretations of local vs UTC time.
What is the Year 2038 problem (Y2K38)?
On January 19, 2038, 32-bit signed integers will overflow at 2,147,483,647 seconds. Modern 64-bit platforms and JavaScript (which uses 64-bit floats) handle dates thousands of years into the future without overflow.
Can I convert dates in the past or negative timestamps?
Yes. Negative timestamps represent dates prior to the January 1, 1970 epoch (e.g., -315619200 is January 1, 1960 UTC).
Is my date conversion processed on a server?
No. All conversions happen directly in your browser using native JavaScript Date APIs. No timestamp data is sent across the network.
Related Developer Utilities
Explore companion date, time, and inspection utilities: