Unix Timestamp Converter – Free Online Tool
Convert Unix epoch seconds or milliseconds to readable dates, convert dates back to timestamps, and batch-convert values.
Free Unix Timestamp Converter for Developers
The Unix Timestamp Converter turns epoch seconds or milliseconds into readable UTC, ISO, and local dates. It also converts local dates back into seconds and milliseconds, which helps when debugging APIs, databases, logs, webhooks, and scheduled jobs.
Seconds vs Milliseconds
Unix timestamps often appear as 10-digit seconds, while JavaScript timestamps usually appear as 13-digit milliseconds. This tool detects both, shows the live current timestamp, and makes it easy to copy the format your system expects.
Where Timestamps Show Up
Timestamps appear in JWT claims, analytics exports, payment events, server logs, cron jobs, audit trails, and API responses. Use the JWT Decoder alongside this tool when inspecting exp, iat, or nbf claims.
Private Local Conversion
Timestamp conversion is pure math and date formatting, so ToolsMint handles it entirely in your browser. No logs, timestamps, or copied data are uploaded.
How to Use Unix Timestamp Converter
- 1
Paste a Unix timestamp in seconds or milliseconds
- 2
Review the UTC, ISO, and local date output
- 3
Use the date picker or batch converter when you need reverse conversion or multiple values
Frequently Asked Questions
Everything you need to know about the Unix Timestamp Converter.
Is this Unix timestamp converter free?
Yes. It is free with no signup or usage limits.
Does it support milliseconds?
Yes. It detects 13-digit millisecond timestamps and 10-digit second timestamps.
Can I convert a date to a timestamp?
Yes. Use the date picker to copy seconds or milliseconds.
What is Unix time?
Unix time counts elapsed seconds since January 1, 1970 at 00:00:00 UTC.
Can I batch convert timestamps?
Yes. Paste multiple timestamps or ISO dates into the batch converter.
Is my timestamp data private?
Yes. Conversion happens locally in your browser.