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Unix Timestamp Converter

Convert Unix epoch timestamps to human dates and back, instantly, in any timezone.

Now
Current timestamp
—
Seconds—
Milliseconds—

Unix timestamp to date

10 digits = seconds · 13 digits = milliseconds

ISO 8601—
RFC 2822—
Human-readable—

Date to Unix timestamp

Interpreted in your selected timezone above

Seconds—
Milliseconds—
How to use

How to convert a Unix timestamp

Convert Unix epoch timestamps to human dates and back, in any timezone, instantly and privately.

  1. Enter a value. Type a Unix timestamp (seconds or milliseconds), or enter a date to get the timestamp.
  2. Pick a timezone. Select a timezone to view the equivalent local time and other formats.
  3. Read the conversions. See the human-readable date, ISO 8601, and RFC output update instantly.
  4. Copy. Copy any value you need with one click.

Unix timestamp to date (and back) in any timezone

Logs, APIs, and JWTs often store time as seconds or milliseconds since 1970-01-01 UTC. Tokitool’s Unix Timestamp Converter turns those numbers into readable dates (and the reverse) with IANA timezone display so you can sanity-check “what local time was that?” without sending values to a remote converter.

Seconds vs milliseconds (quick rule)

Classic Unix time is about 10 digits today (seconds). JavaScript Date.now() style values are often 13 digits (milliseconds). If you paste a 13-digit value and get a date in the year 50,000, you treated milliseconds as seconds. This tool detects both, but double-check the unit when a log line is ambiguous.

When to use it (and when not to)

  • Good for debugging API responses, JWT exp/iat, and server logs.
  • Good for converting a calendar date back to an epoch for a test fixture.
  • Not a calendar app. It will not schedule reminders or store history across visits.
  • Not a substitute for your language’s date library when you are writing production code.

When timestamps sit inside JSON, format the payload first with the JSON Formatter, then convert the fields you care about. Everything stays in the tab.

Unix timestamp basics

Seconds vs milliseconds

Classic Unix time is seconds since 1970-01-01 UTC (about 10 digits today). Many APIs and JavaScript Date values use milliseconds (13 digits). This tool detects both.

Timezones

Pick any IANA timezone to display the human-readable side. The underlying epoch value is still absolute UTC-based time, only the presentation changes.

Private by design

Conversion runs locally. Nothing you type is logged or uploaded, which matters when timestamps appear in logs, tokens, or forensic notes.

What is Unix epoch 0?

1970-01-01 00:00:00 UTC. Negative timestamps are before that instant; not all systems support them equally.

ISO 8601 vs locale date

ISO 8601 is a standard machine-friendly string. Locale display follows the timezone you pick for human reading.