Uwarp

Paste seconds or milliseconds—auto mode picks the unit from digit length.

Interpreted as seconds · in 0s

ISO-like strings work best (e.g. 2024-01-15T12:00:00Z).

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Unix timestamp to date converter

Convert Unix timestamps to dates (UTC & local). Seconds or ms auto-detected. Local-first—no signup.

What is a Unix timestamp converter?

A Unix timestamp converter (epoch / timestamp to date tool) turns integer seconds or milliseconds since the Unix epoch into human-readable UTC and local dates—and can reverse the mapping. Use this free local-first converter when debugging logs or checking API times—no signup.

Timestamp converter features

Unix epoch ↔ readable date in the browser.

  • Instant conversion

    Results update as you type—no submit step.

  • Auto seconds / ms

    Digit length detects common epoch formats; override anytime.

  • UTC, local, ISO

    Copy the format that matches your logs or APIs.

  • Date → epoch

    Turn a human date into seconds, or snap to now.

How to convert timestamp to date

From epoch integer to readable time.

  1. Paste the timestamp

    Drop in seconds or milliseconds from logs, APIs, or databases.

  2. Confirm the unit

    Leave Auto, or force seconds / milliseconds if the guess is wrong.

  3. Copy the date

    Grab UTC, local, ISO, or the normalized epoch values.

Tips for Unix timestamps

Avoid common epoch mix-ups.
  • 01

    Check digit length

    A 13-digit value treated as seconds lands centuries ahead—switch to milliseconds.

  • 02

    Prefer ISO for APIs

    ISO 8601 (…Z) is unambiguous across time zones.

  • 03

    Local vs UTC

    Local uses your browser zone; UTC matches most server logs.

  • 04

    Y2038 on 32-bit

    Signed 32-bit second counters overflow in 2038—prefer 64-bit storage in new systems.

Great for

When an epoch converter helps.

  • Debugging logs

    Turn opaque epoch fields into wall-clock times.

  • API payloads

    Verify created_at / expires_at integers against ISO strings.

  • Data analysis

    Spot-check CSV or JSON timestamps before charting.

Why convert here

Fast local Unix timestamp conversion.

  • Local-first

    Timestamps never leave the browser for this tool.

  • Free

    Unlimited conversions with no signup.

  • Bidirectional

    Epoch → date and date → epoch in one place.

  • Clear units

    See whether the value was read as seconds or milliseconds.

Technical notes

How this epoch converter works.
Engine
Browser Date — same clock your front-end code uses.
Auto unit
Absolute digit length ≥ 11 → milliseconds; otherwise seconds.
Safe integers
Rejects values outside Number.isSafeInteger before constructing Date.
Privacy
Client-side only—no network upload.

Sources & References

References for Unix time and JavaScript Date.
  • “JavaScript Date objects represent a single moment in time in a platform-independent format. Date objects encapsulate an integral number that represents milliseconds since the midnight at the beginning of January 1, 1970, UTC.”
    — MDN Web Docs — Date

    MDN — Date: Defines the millisecond epoch model this converter uses for display formats. developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date

  • “The Date.now() static method returns the number of milliseconds elapsed since the epoch, which is defined as the midnight at the beginning of January 1, 1970, UTC.”
    — MDN Web Docs — Date.now()

    MDN — Date.now(): Documents the millisecond Unix timestamp format common in browsers and APIs. developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/now

  • “Unix time is a date and time representation widely used in computing. It measures time by the number of non-leap seconds that have elapsed since 00:00:00 UTC on 1 January 1970.”
    — Wikipedia — Unix time

    Wikipedia — Unix time: Background on epoch seconds, leap-second conventions, and the Year 2038 problem. en.wikipedia.org/wiki/Unix_time

Frequently Asked Questions

Quick answers about this tool—open a question to read more.