Is 10 digits seconds or milliseconds?

Ten digits is seconds. Thirteen digits is milliseconds. Sixteen is microseconds and nineteen is nanoseconds. The Auto unit uses that length, and you can override it.

Which time zone is the timestamp itself in?

A unix timestamp is always UTC. The time zone only changes how the calendar date is written, or which local time you mean when you convert a date back to epoch.

What happens during daylight-saving time?

A skipped hour, such as 02:30 on the spring-forward day in America/New_York, is reported as a gap. A repeated hour lists both UTC instants and uses the earlier one.

Does this page upload the timestamp?

No. Parsing and time-zone math stay in the browser.

Unix timestamp converter

Turn epoch seconds or milliseconds into a date, and a date in any time zone back into epoch time.

Runs in browser

Use via MCP

Timestamp

Timestamp or date

A number, ISO-8601, RFC 2822, or now.

Time zone

Any IANA zone. A date with no offset uses this zone.

Result

Seconds1609459200

Milliseconds1609459200000

2021-01-01T00:00:00Z

2021-01-01T00:00:00.000Z

Friday · Fri, 01 Jan 2021 00:00:00 +0000

UTC2021-01-01 00:00:00Z
America/New_York2020-12-31 19:00:00-05:00
America/Chicago2020-12-31 18:00:00-06:00
America/Denver2020-12-31 17:00:00-07:00
America/Los_Angeles2020-12-31 16:00:00-08:00
America/Sao_Paulo2020-12-31 21:00:00-03:00
Europe/London2021-01-01 00:00:00Z
Europe/Paris2021-01-01 01:00:00+01:00
Europe/Berlin2021-01-01 01:00:00+01:00
Africa/Cairo2021-01-01 02:00:00+02:00
Asia/Dubai2021-01-01 04:00:00+04:00
Asia/Karachi2021-01-01 05:00:00+05:00
Asia/Kolkata2021-01-01 05:30:00+05:30
Asia/Singapore2021-01-01 08:00:00+08:00
Asia/Tokyo2021-01-01 09:00:00+09:00
Australia/Sydney2021-01-01 11:00:00+11:00
Pacific/Auckland2021-01-01 13:00:00+13:00

UTC UTC

Use from your agent

Streamable HTTP at https://benchline.fabwaseem.com/mcp. No key. The tool name is convert_unix_timestamp.

mcp.jsonjson

2 "mcpServers": {

3 "benchline": {

4 "url": "https://benchline.fabwaseem.com/mcp"

5 }

6 }

tools/calljson

2 "jsonrpc": "2.0",

3 "id": 1,

4 "method": "tools/call",

5 "params": {

6 "name": "convert_unix_timestamp",

7 "arguments": {

8 "input": "",

9 "timeZone": "UTC",

10 "unit": "auto"

11 }

12 }

13}

Related tools

How it works

Free epoch converter for unix timestamps. Switch between seconds, milliseconds, microseconds, and nanoseconds, read ISO-8601 and RFC 2822 dates, and convert both ways across IANA time zones. Runs in the browser.

01
Paste a timestamp or a date
A number is read as epoch time. An ISO-8601 or RFC 2822 date is read as a calendar time.
02
Pick the unit and time zone
Auto detects seconds, milliseconds, microseconds, or nanoseconds from the length. The zone formats the local time.
03
Copy seconds, milliseconds, or ISO-8601
Date to epoch uses the date and time you enter as wall time in the selected zone.