Unix Timestamp Converter

What is this tool?

This Unix timestamp converter translates epoch seconds into ISO date strings and converts browser-local date-time input back into epoch seconds. Unix time counts seconds elapsed since 1970-01-01 00:00:00 UTC.

The distinction between seconds and milliseconds is important. Many APIs use seconds, JavaScript Date.now() returns milliseconds, and databases may store either. A value that is off by a factor of 1000 usually points to that mismatch.

Use it for logs, JWT exp and iat claims, scheduled jobs, analytics exports, database fields, cache expiration values, and API debugging.

How to use

1. Use the current timestamp display when you need the current epoch value.
2. Enter a Unix timestamp in seconds to convert it to an ISO date.
3. Choose a local date and time to convert it back to epoch seconds.
4. Confirm time-zone expectations before using the value in APIs, jobs, or databases.

Examples

Related tools & concepts

• Unix time overview
• Cron Expression Parser
• JWT Decoder
• CSS Unit Converter — px, rem, em & pt
• Image to Base64 — Data URI Encoder
• Aspect Ratio Calculator — Resize Without Distortion