Converters

Timestamp Converter Online - Convert Unix Time in Your Browser

Convert Unix timestamps to readable dates and generate seconds or milliseconds online. Browser-based timestamp conversion for APIs, logs, and tokens.

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Current Unix Timestamp
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Current Date
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Timestamp to Date

UTC
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Local
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Relative
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Date to Timestamp

Seconds
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Milliseconds
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Continue Workflow

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Example

Seconds vs milliseconds

A 10-digit value is usually seconds. A 13-digit value is usually milliseconds.

Input


                        1700000000
1700000000000

Output


                        1700000000 is interpreted as seconds.
1700000000000 is interpreted as milliseconds.

Check an expiration timestamp

Token and cookie expiration fields often use Unix seconds. Convert them before debugging authentication or session issues.

Input


                        exp: 1735689600

Output


                        UTC: 2025-01-01T00:00:00.000Z

Generate a timestamp for a test case

Date-to-timestamp conversion is useful when writing fixtures, scheduled job tests, or API examples.

Input


                        Local date and time: 2026-06-11 09:00

Output


                        Seconds and milliseconds values for the selected local moment.

Practical Notes

How to Use

  1. 1. Use the live timestamp panel to see the current Unix time.
  2. 2. Paste a seconds or milliseconds timestamp into the timestamp input.
  3. 3. Convert it to view UTC, local, and relative time.
  4. 4. Pick a local date and time to generate seconds and milliseconds values.

Features

Use Cases

Frequently Asked Questions

What is a Unix timestamp?
A Unix timestamp is the number of seconds since January 1, 1970 at 00:00:00 UTC.
Why are some timestamps 13 digits?
Thirteen-digit timestamps are usually milliseconds. Ten-digit timestamps are usually seconds.
Does local time affect the timestamp?
The timestamp represents the same moment everywhere. Local time only changes how that moment is displayed.
Is conversion done online?
The tool is available online, but timestamp conversion runs locally in your browser. No timestamp values are uploaded for processing.
How do I know if a Unix timestamp is seconds or milliseconds?
A 10-digit Unix timestamp is usually seconds, while a 13-digit value is usually milliseconds. If the converted date is decades off, the value was probably interpreted with the wrong unit.
Why does my timestamp show a different day locally?
The timestamp points to one UTC moment. Your local timezone can display that moment on a different calendar day, especially near midnight UTC.
Which timestamp unit should APIs use?
Either seconds or milliseconds can work, but the API should document the unit clearly and use it consistently across fields.