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Timestamp Converter

Unix time to human dates and back.

100% FreeRuns instantlyNo watermark
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  1. 1Paste inputAdd the text, code or data.
  2. 2AdjustChoose formatting or generation options.
  3. 3RunProcess everything in the browser.
Private by designProcessed on your device where possible.
Works on any deviceDesktop, tablet and mobile browsers.
No installationOpen the page and start working.
Always free coreUse the free plan for everyday tasks.

How to use Timestamp Converter

Paste input

Add the text, code or data.

01
Adjust

Choose formatting or generation options.

02
Run

Process everything in the browser.

03
Copy

Copy or download the clean result.

04

Your files stay private

Your work is processed locally in your browser where possible and is never added to a Vootkit upload library.

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Unix time is a single number counting seconds since the start of 1970, which is exactly why it appears in logs, APIs and databases — and why it is unreadable to humans without converting it.

What Timestamp Converter does

Converts a Unix timestamp into ISO 8601, UTC and your local time, and converts a date back into a timestamp.

Seeing all three at once is the point. Most timestamp bugs are timezone bugs, and they become obvious the moment you can compare the UTC and local readings side by side.

Formats and gotchas

EpochSeconds since 1 January 1970, 00:00:00 UTC
ISO 8601The interchange format — 2026-07-23T14:30:00Z
Seconds vs millisecondsJavaScript uses milliseconds; most APIs use seconds
Spotting the differenceA 13-digit number is milliseconds, 10 digits is seconds
TimezoneA Unix timestamp is always UTC — it carries no zone
Year 203832-bit signed timestamps overflow in January 2038
Negative valuesValid — they represent dates before 1970

Detailed steps

  1. Paste a Unix timestamp to see it as ISO, UTC and local time.
  2. Or enter a date to get the timestamp back.
  3. If a converted date lands in 1970 or the far future, check whether you have seconds and milliseconds mixed up.

Worth knowing

A date around 1970 almost always means milliseconds were read as seconds, and a date tens of thousands of years away means the reverse. Count the digits: ten is seconds, thirteen is milliseconds. That single check resolves most timestamp bugs before you start reading code.

Frequently Asked Questions

My timestamp converts to 1970. What went wrong?

You almost certainly have a millisecond value being read as seconds, or a value that was truncated. Ten digits is seconds and thirteen is milliseconds — dividing a millisecond value by 1000 usually fixes it immediately.

Does a Unix timestamp have a timezone?

No, and that is its main advantage. It is always seconds since the epoch in UTC. Timezone only enters when you format it for display, which is where the vast majority of date bugs live.

What is the 2038 problem?

A signed 32-bit integer runs out in January 2038 and wraps to a negative number, putting the date in 1901. Modern systems use 64-bit values and are fine, but embedded devices and old databases are still a live concern.

Why use ISO 8601 rather than a normal date?

Because it is unambiguous. 03/04/2026 is March in the US and April nearly everywhere else; 2026-04-03 can only mean one thing, and it sorts correctly as plain text.

Is Timestamp Converter free?

Yes. The Vootkit free plan includes 5 tool runs a day. Upgrade to Vootkit Pro for unlimited daily use, an ad-free workspace and saved workflows.

Are my files uploaded?

No. Timestamp Converter runs entirely in your browser — your file is processed on your own device and never sent to a server. There is nothing for us to store or delete.

Do I need to install anything?

No. Timestamp Converter works in any modern browser on desktop, tablet or phone. Open the page and start.

How often can I use it? Is there a daily limit?

On the free plan you get 5 tool runs a day. When you reach the limit you'll see a prompt to upgrade, and it resets the next day. Vootkit Pro removes the cap entirely for unlimited daily use.

This tool processes everything locally in your browser. You can disconnect from the internet after the page loads and it will still work.