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Unix Timestamp Converter

Convert Unix seconds or milliseconds to readable dates—and turn dates back into timestamps.

Seconds + millisecondsTimezone awareMultiple date formats

Seconds and milliseconds are detected automatically.

Timestamp converted successfully.

Valid Date

Converted Values

Copy the exact format required by your application.

Unix Seconds1793521181
Unix Milliseconds1793521181000
ISO 86012026-11-01T08:19:41.000+00:00
RFC 2822Sun, 01 Nov 2026 08:19:41 +0000
Human ReadableSunday, November 1, 2026 at 8:19:41 AM UTC
UTC2026-11-01 08:19:41 UTC

Technical Specs

Epoch
1970-01-01 UTC
Precision
Milliseconds
Formats
ISO 8601 + RFC 2822
Timezones
10 common regions

Time without ambiguity

Why developers use Unix timestamps

Unix time represents an instant independently of display format. Convert it into local time only at the interface boundary, and retain explicit timezone offsets when exchanging ISO 8601 strings.

What is Unix Timestamp Converter?

Unix Timestamp Converter translates elapsed seconds or milliseconds since the Unix epoch into readable dates and converts calendar input back into an epoch value. It separates the instant itself from timezone presentation so developers can investigate API, database, and log timestamps accurately.

How to use Unix Timestamp Converter

  1. 1.Choose timestamp-to-date or date-to-timestamp conversion.
  2. 2.Enter an epoch value or calendar date and specify the intended precision.
  3. 3.Select a timezone for display and compare ISO 8601, RFC 2822, UTC, and local output.
  4. 4.Copy the standardized value and verify assumptions about seconds, milliseconds, and offsets.

Key features

  • ✓Automatic length detection distinguishes common second and millisecond timestamps.
  • ✓Timezone selection changes display without changing the represented instant.
  • ✓ISO 8601 and RFC 2822 outputs support interoperable debugging.
  • ✓UTC and regional presentations make offset differences explicit.
  • ✓Current-time output provides a quick reference for testing integrations.

Common use cases

  • Interpret an API field such as `created_at` stored as epoch seconds.
  • Diagnose a frontend date that appears one day early in another timezone.
  • Convert a scheduled UTC date into a timestamp for a database record.
  • Check whether a mobile event value is in seconds or milliseconds.

Frequently asked questions

What is a Unix timestamp?

It counts elapsed time from 1970-01-01 00:00:00 UTC, usually in seconds, without storing a display timezone.

How can I tell seconds from milliseconds?

Current second timestamps are about ten digits, while millisecond values are usually thirteen; historical and future ranges still require context.

Does changing the timezone change the timestamp?

No. It changes how the same instant is displayed, not the underlying epoch value.

Why is my converted date off by several hours?

The source may have been interpreted in a different timezone or without an explicit offset. Confirm whether the input is UTC or local time.

What is the safest date format for APIs?

ISO 8601 with an explicit `Z` or numeric offset is usually clearer than a locale-specific date string.

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