OnliKit

Timestamp Converter

Convert epoch, ISO dates, and timezones side by side

Use Timestamp Converter free in your browser. Free online timestamp converter. Turn unix epoch seconds or milliseconds into human dates, compare multiple timezones side by side, and copy results — runs in your browser, no signup.

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What you can do with Timestamp Converter

Timestamp Converter on OnliKit is a free browser tool for everyday work — convert epoch, iso dates, and timezones side by side. Use it when you need a quick result without installing software or creating an account.

  • Convert unix seconds, milliseconds, or ISO-8601 strings in one workspace.
  • Use Now to snap to the current instant and see every zone update live.
  • Compare UTC, your local zone, and extra IANA timezones side by side.
  • See relative time such as in 2 hours or 3 days ago.
  • Copy any row for logs, tickets, or API payloads.
  • Everything runs locally — timestamps never leave your browser.

Why use Timestamp Converter?

Use Timestamp Converter when debugging logs, JWT claims, or API payloads that mix epoch seconds and ISO strings. Paste a value once and read it across the zones your team actually uses.

Side-by-side timezone rows make DST mistakes obvious before you ship a schedule or expiry. Relative phrasing helps confirm whether a stamp is in the past or still ahead.

No account is required. Conversion stays on your device so production timestamps and internal IDs are not uploaded to OnliKit.

How to use Timestamp Converter

  1. 01Choose input mode (unix seconds, milliseconds, ISO-8601, or Now).
  2. 02Paste or type the timestamp, or click Now.
  3. 03Add or change timezones in the comparison table.
  4. 04Copy the row or formatted string you need.

Frequently asked questions

What is a unix timestamp?

A unix timestamp is the number of seconds (or milliseconds) since 1970-01-01 UTC. This tool converts those numbers to readable dates and back.

Does the converter upload my timestamps?

No. Parsing and timezone conversion run entirely in your browser. Nothing is sent to OnliKit servers.

Can I compare multiple timezones?

Yes. UTC and your local zone are always shown. Add more IANA zones to see the same instant side by side.

Seconds or milliseconds?

Pick the matching input mode. Values around 1e12 are usually milliseconds; around 1e9 are usually seconds.

Related tools

After you finish with Timestamp Converter, try these related OnliKit tools — or browse all tools.

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