How to Convert Unix Timestamps and Epoch Time

Quick answer

Use this guide when logs, APIs, databases, or events show timestamps that are hard to read. The calculator helps convert one value, many values, or a date difference.

Who this is for

• Developers debugging logs and API responses
• Support teams checking event times
• QA teams comparing incident timelines
• Analysts converting timestamp exports

What to remove or avoid

• No data normally needs redaction here unless pasted logs include private details
• Sensitive log text if you only need timestamps

What to keep visible

• Original timestamp value
• Detected format such as seconds or milliseconds
• UTC and local time
• Optional timezone comparison when working across regions

Useful controls in the tool

• Single convert for one timestamp or date.
• Batch convert for pasted lists, CSV, JSON, or log text.
• Difference mode to measure time between two dates.
• Export CSV or JSON when reviewing many timestamps.

Step-by-step

1. 1Paste a timestamp or readable date.
2. 2Check the detected format.
3. 3Review UTC, local, and relative time.
4. 4Use optional timezone only when another region matters.
5. 5Use batch mode for many values.

Example

Before:
1777728000
1777728000000
2026-05-02T12:00:00Z

After:
Unix seconds -> 2026-05-02T13:20:00.000Z
Unix milliseconds -> 2026-05-02T13:20:00.000Z

What to do after review

• Check whether the source value is seconds or milliseconds.
• Use timezone comparison for teams in another region.
• Export batch results when reviewing many timestamps.

Tip: Most timestamp mistakes happen when seconds and milliseconds are mixed.