Unix Timestamp Converter

Convert timestamps to readable dates (UTC/local), and convert dates back to Unix seconds or milliseconds. Runs locally in your browser.

Now: 1,771,000,070 Local only

Display timezone

Changes how dates are shown in the results. Default is Local.

Local

Tip: choose “Custom…” for any IANA timezone.

Timestamp → date

Paste a Unix timestamp and choose seconds vs milliseconds (or let the tool auto-detect).

Unix timestampnumbers only

Unitsec vs ms

UTC ISO 8601

2023-11-14T22:13:20.000Z

Local time

2023-11-14 22:13:20.000 (UTC+00:00)

In Local

2023-11-14 22:13:20.000 (UTC)

RFC 1123 (UTC)

Tue, 14 Nov 2023 22:13:20 GMT

Date → timestamp

Paste an ISO date/time. If you omit a timezone, choose whether to interpret it as local time or UTC.

Date/timeISO recommended

If no timezone is providedparsing rule

Unix seconds

1,770,976,800

Unix milliseconds

1,770,976,800,000

UTC ISO 8601 (normalized)

2026-02-13T10:00:00.000Z

In Local

2026-02-13 10:00:00.000 (UTC)

Seconds vs milliseconds

Unix timestamps are often stored in seconds (10 digits) or milliseconds (13 digits). If your date looks ~1000× too far in the future/past, you probably picked the wrong unit.

UTC vs local time

2026-02-13T10:00:00Z is explicit UTC. A string without timezone (like 2026-02-13T10:00:00) is ambiguous, so the tool lets you choose how to interpret it.

Common formats

1700000000 (Unix seconds)
1700000000000 (Unix milliseconds)
2026-02-13T10:00:00Z (ISO 8601 UTC)
2026-02-13T10:00:00-05:00 (ISO 8601 with offset)