CodeCraft

Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Supports seconds and milliseconds.

Current Time
Sec:
Ms:
ISO: 2026-09-24T02:59:44.383Z

Timestamp → Date

Date → Timestamp

How to Use

  1. The live clock at the top shows the current Unix timestamp (seconds and milliseconds). Click any number to copy it.
  2. Enter a timestamp in the left panel (10-digit seconds or 13-digit milliseconds) and click Convert to get ISO 8601, local time, and relative time.
  3. Use the date-time picker on the right to convert a date to Unix timestamps (both seconds and milliseconds are shown).

About Unix Timestamp Converter

Unix timestamps represent the number of seconds (or milliseconds) elapsed since the Unix Epoch -- January 1, 1970, 00:00:00 UTC. They are timezone-independent, making them ideal for storing and comparing dates across distributed systems. This converter lets you instantly translate between Unix timestamps and human-readable date formats. You can also get the current timestamp, convert timestamps to different timezones, and compare dates. Unix timestamps are used extensively in databases, APIs, log files, and programming languages. Common pitfalls include millisecond vs. second confusion and the Year 2038 problem for 32-bit systems.

Use Cases

API Log Analysis

Convert Unix timestamps in server logs or API responses to human-readable dates for debugging.

Database Record Inspection

Decode created_at/updated_at integer columns stored as epoch seconds in databases.

Scheduling & Cron Jobs

Calculate exact timestamps for scheduling future events or verifying cron execution times.

Cross-Timezone Coordination

Convert timestamps to different timezones to coordinate deployments or meetings across regions.

Examples

Input
1700000000
Output
2023-11-14 22:13:20 UTC

Unix timestamp (seconds since 1970-01-01T00:00:00Z) converted to a readable UTC date.

Input
1700000000000
Output
2023-11-14 22:13:20 UTC

Millisecond timestamp (13 digits) — common in JavaScript Date.now() — automatically detected.

Common Pitfalls & Edge Cases

  • ⚠JavaScript uses milliseconds, but most backend systems use seconds. Divide/multiply by 1000 accordingly.
  • ⚠The Year 2038 problem: 32-bit signed integers overflow at 2147483647 (2038-01-19). Use 64-bit timestamps.
  • ⚠Timestamps are always UTC. Display timezone conversion depends on the user's locale settings.
  • ⚠Negative timestamps represent dates before 1970-01-01 — some systems don't support these.

🔒 Data Privacy

All timestamp calculations are performed locally in your browser using JavaScript's Date API. No data is transmitted.

Standards & References

Frequently Asked Questions

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