# Unix Timestamp Converter

> Free Unix timestamp converter. Convert epoch time to date and date to timestamp in seconds or milliseconds, with UTC, local and ISO 8601 output — runs locally.

Convert Unix timestamps to human-readable dates and back, in seconds or milliseconds, with live current time and UTC, local and ISO 8601 output.

- **Live tool:** https://www.toolnova.org/dev-tools/timestamp-converter
- **Category:** Developer Tools (https://www.toolnova.org/dev-tools)
- **Price:** Free
- **Requirements:** Runs in a modern web browser · No signup · No install

## What this tool does

- Timestamp → UTC, local & ISO 8601
- Date → Unix seconds & milliseconds
- Live current Unix time
- Auto-detects seconds vs milliseconds
- One-click copy for every value
- Runs locally in your browser

## How to use Unix Timestamp Converter

1. **Enter a timestamp** — Paste a Unix time in seconds or milliseconds.
2. **Read the date** — See UTC, local and ISO 8601 output.
3. **Or pick a date** — Choose a date to convert back to a timestamp.
4. **Copy** — Copy any value with one click.

## Common use cases

- Decode a Unix timestamp in a log file
- Convert an API's epoch field to a date
- Get the current Unix time for testing
- Turn a date into a timestamp for a query

## About

### Epoch time made readable

A Unix timestamp counts the seconds since 1 January 1970 UTC — compact for computers but meaningless to humans. Paste a timestamp and this converter shows the exact UTC time, your local time and the ISO 8601 string. It auto-detects whether you entered seconds or milliseconds, so logs and API responses in either format just work.

### Convert both directions

Going the other way, pick any date and time and instantly get the Unix value in both seconds and milliseconds plus the ISO string. A live clock shows the current epoch time, which you can copy directly. Every field has a copy button, and all conversions happen locally — nothing is uploaded.

## FAQ

### What is a Unix timestamp?

It's the number of seconds elapsed since 00:00:00 UTC on 1 January 1970 (the Unix epoch), used widely in programming to represent a point in time compactly.

### How does it know if I entered seconds or milliseconds?

It uses the length of the number: about 10 digits is treated as seconds and about 13 digits as milliseconds, which covers current dates in both formats.

### What time zone is the output in?

You get UTC, your browser's local time zone, and the timezone-aware ISO 8601 string, so you can read the moment however you need.

### Is it free?

Yes — completely free, no signup, and all conversions run locally in your browser.

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