Unix Timestamp Converter
Convert between Unix timestamps and dates
Live current timestamp
Bidirectional conversion
Date/time picker
Auto-detect format
The log file shows 1704067200. Your database has 1704067200000. The API returns 2024-01-01T00:00:00Z. They're all the same moment in time, but good luck comparing them at a glance.
Unix timestamps are universal—every system uses them. But they're not human-readable. Is 1704067200 in the past? The future? What timezone? You need a translator between machine time and human time.
This converter transforms timestamps instantly—in both directions—so you can debug logs, verify dates, and work with time data without mental gymnastics.
What is a Unix Timestamp?
A Unix timestamp (or Epoch time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. This "Unix Epoch" provides a universal reference point that all computer systems can agree on, regardless of timezone or calendar format.
Examples:
0 → January 1, 1970, 00:00:00 UTC
1704067200 → January 1, 2024, 00:00:00 UTC
1000000000 → September 9, 2001, 01:46:40 UTC
JavaScript and Java use milliseconds (13 digits like 1704067200000). Most Unix systems use seconds (10 digits like 1704067200). This converter handles both automatically.
Why People Actually Need This Tool
Server logs, database records, API responses, cookies, JWTs—timestamps are the universal language of "when." But humans can't read 1704067200 without help.
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Debugging logs — Convert log timestamps to understand when events occurred.
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Database queries — Translate human dates to timestamps for WHERE clauses.
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API testing — Verify expiration times, creation dates, and time-based parameters.
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JWT debugging — Check
iatandexpclaims in human-readable form. -
Data analysis — Convert timestamp columns to human dates for reporting.
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Cache debugging — Verify cache expiration times make sense.
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Scheduling — Calculate future timestamps for cron jobs or scheduled tasks.
How to Use the Unix Timestamp Converter
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View current timestamp — See the live current time in both formats.
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Convert timestamp to date — Paste any Unix timestamp to see the human-readable date.
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Convert date to timestamp — Select or enter a date to get its timestamp.
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Copy results — One-click copy in any format you need.
| Timestamp Length | Format | Example |
|---|---|---|
| 10 digits | Seconds | 1704067200 |
| 13 digits | Milliseconds | 1704067200000 |
| ISO 8601 | String format | 2024-01-01T00:00:00Z |
Unix timestamps are always UTC. When converting to local time, make sure you're accounting for your timezone offset. 1704067200 is midnight UTC—which is 7pm EST the day before.
Real-World Use Cases
1. The Expired Token Investigation
Context: Users report authentication failures. JWT tokens should be valid for 1 hour.
Problem: Token shows "exp": 1704067200. Is that in the past?
Solution: Convert 1704067200 → January 1, 2024, 00:00:00 UTC. Compare to current time.
Outcome: Token was expired. Server clock was wrong, issuing tokens with past expiration.
2. The Database Time Query
Context: Need to find all orders placed on New Year's Day 2024.
Problem: Database stores created_at as Unix timestamps, not dates.
Solution: Convert "2024-01-01 00:00:00" → 1704067200 and "2024-01-01 23:59:59" → 1704153599.
Query: WHERE created_at BETWEEN 1704067200 AND 1704153599
Outcome: Exact date range query without date function overhead.
3. The Log File Analysis
Context: Debugging why server crashed at some point overnight.
Problem: Logs show [1704089400] ERROR: Out of memory but when was that?
Solution: Convert 1704089400 → January 1, 2024, 06:10:00 UTC.
Outcome: Crash happened during the early morning backup job. Resource contention identified.
4. The Cache Expiration Debugging
Context: Cached data isn't expiring when expected.
Problem: Cache header shows expires: 1704067200. Is that the right time?
Solution: Convert to human time. It's yesterday. Cache is already expired but still being served.
Outcome: Cache server wasn't respecting expiration. Configuration fixed.
5. The API Rate Limit Reset
Context: API returns "rate_limit_reset": 1704070800 after hitting limits.
Problem: How long until you can make requests again?
Solution: Convert 1704070800 → January 1, 2024, 01:00:00 UTC. Calculate difference from now.
Outcome: Know exactly how long to wait before retrying.
6. The Scheduled Job Configuration
Context: Setting up a cron job to run at a specific future date.
Problem: Need to set the job to trigger at "March 15, 2024, 3:00 PM EST".
Solution: Convert to timestamp: 1710529200. Use in scheduling system.
Outcome: Job scheduled precisely without timezone ambiguity.
7. The Y2K38 Planning
Context: Systems architect reviewing long-term data storage decisions.
Problem: Will 32-bit timestamp fields overflow before the data's retention period ends?
Solution: Convert 2147483647 → January 19, 2038, 03:14:07 UTC. That's the 32-bit limit.
Outcome: Identify systems needing upgrade to 64-bit timestamps before 2038.
Common Mistakes and How to Avoid Them
Off-by-one-day errors, timezone confusion, and second/millisecond mismatches cause countless production incidents. Always verify conversions carefully.
Privacy and Data Handling
This Unix Timestamp Converter operates entirely in your browser. No server interaction.
- No timestamps are sent anywhere.
- No conversion history is stored.
- No account required.
- Works completely offline.
Debug your production timestamps without exposing any data.
Conclusion
Time is simple for humans—"yesterday," "next Tuesday." It's complicated for computers that need precision, timezones, and universal agreement. Unix timestamps solve the computer problem but create a human readability problem.
This converter bridges that gap instantly. Whether you're debugging auth tokens, analyzing logs, or setting up scheduled jobs, translate between human time and machine time in seconds.
Time waits for no one. Neither should you wait to understand timestamps.