Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. 100% client-side processing.
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What is a Unix Timestamp?
A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds elapsed since the Unix Epoch: 1970-01-01T00:00:00Z (UTC). The choice of date traces back to the original Unix implementation at Bell Labs (1969–1971) — January 1, 1970 was a convenient round number close to the system's birth. It's been the de facto time standard in computing for over 50 years.
Why use Unix time over human dates?
- Timezone-free — single integer, no DST or locale ambiguity
- Comparable — direct integer comparison gives chronological order
- Compact — 4 or 8 bytes vs ~25 chars for ISO 8601
- Arithmetic-friendly — duration = end − start, no calendar math
Where you'll see Unix timestamps
JWT iat/exp claims, MySQL UNIX_TIMESTAMP(), PostgreSQL EXTRACT(EPOCH ...), Redis TTL, ls -l --time-style=+%s, log files (rsyslog, syslog), cron schedules, AWS CloudWatch metrics, blockchain block timestamps. Mostly seconds; sometimes milliseconds (Java's System.currentTimeMillis(), JavaScript's Date.now()).
⚠️ Reference Only
Output is generated based on your input and is provided for reference. Results may vary depending on your specific use case, edge cases, or environment-specific behavior. We do not guarantee accuracy of conversions, validations, or computed values.
Always verify critical outputs against official documentation or production environments. We are not responsible for any decisions or losses based on these tool results.
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