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Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates.

Best for: Reading log entries, API responses and database fields, and debugging anything that stores time as a number.

Complete guide

Input

How it's calculated & sources
The Unix Timestamp Converter uses the standard, deterministic formula, so the same inputs always produce the same result. It runs entirely in your browser, so your inputs are never uploaded. Last reviewed June 2026.

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

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Complete guide

Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is Unix Timestamp?
A timestamp converter translates between a Unix timestamp and a human-readable date and time, in both directions.
Why does Unix Timestamp matter?
The same instant expressed either as a count since 1970 or as a calendar date and time. Be clear about the time zone, since the underlying value is in UTC.
How is Unix Timestamp calculated?
Unix time counts the seconds (or milliseconds) elapsed since the epoch, midnight UTC on 1 January 1970, ignoring leap seconds. Converting means adding that count to the epoch, or measuring back to it. Note that JavaScript and many APIs use milliseconds, while Unix tools use seconds.
What are common unix timestamp mistakes?
Confusing seconds with milliseconds (a factor of 1000 off).
When should you use the Unix Timestamp Converter?
Reading log entries, API responses and database fields, and debugging anything that stores time as a number.

What is the Unix Timestamp Converter?

A timestamp converter translates between a Unix timestamp and a human-readable date and time, in both directions.

How the Unix Timestamp Converter works

Unix time counts the seconds (or milliseconds) elapsed since the epoch, midnight UTC on 1 January 1970, ignoring leap seconds. Converting means adding that count to the epoch, or measuring back to it. Note that JavaScript and many APIs use milliseconds, while Unix tools use seconds.

Worked example

1700000000 (seconds) -> Tue, 14 Nov 2023 22:13:20 UTC

Key terms

Epoch:
The reference instant, 1970-01-01 00:00:00 UTC.
UTC:
Coordinated Universal Time, the zone Unix timestamps are measured in.

Common mistakes to avoid

  • Confusing seconds with milliseconds (a factor of 1000 off).
  • Mixing up UTC and local time when displaying the result.
  • Forgetting the Year 2038 problem for 32-bit signed timestamps.
  • Expecting leap seconds, which Unix time does not count.

Keywords: timestamp, unix, epoch.

Sources: MDN — Date.now() and Unix time

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the Unix Timestamp Converter free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the Unix Timestamp Converter?+

Unix Timestamp Converter uses the standard unix timestamp formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The Unix Timestamp Converter runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Unix Timestamp Converter on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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# Unix Timestamp Converter — the free tool I keep coming back to

Convert between Unix timestamps and human-readable dates.

Try it: https://freetoolsgalaxy.com/tools/timestamp-converter
Quora answer
The fastest way is to use a free in-browser unix timestamp converter: https://freetoolsgalaxy.com/tools/timestamp-converter. Convert between Unix timestamps and human-readable dates.

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