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Unix Timestamp to Date Converter — Free Online Tool

Convert Unix timestamps (seconds or milliseconds) to ISO 8601, UTC and local dates in your browser. Free, private, no tracking, nothing uploaded.

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Timestamp input

Date output

Why convert a Unix timestamp?

Logs, databases and APIs are full of raw epoch values like 1718100000 that no human can read. Paste one above to see the actual date in several formats at once.

How it works

The converter parses the number locally and prints ISO 8601 (UTC), the RFC-style UTC string, your local time, both Unix seconds and milliseconds, and a relative phrase like “in 2 days”. Millisecond inputs are detected by their length.

Frequently asked questions

Is my data uploaded to a server?
No. Everything runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.
Seconds or milliseconds — how is it detected?
Values with 13 or more digits are treated as milliseconds, shorter ones as seconds — the usual convention. Both variants are shown in the output either way.

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