Epoch / Unix Timestamp Converter — Bulk
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About This Tool
Free, private, serverless Epoch and Unix timestamp converter with bulk support. Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds, displays UTC, local time, ISO 8601, relative time, and timezone info. Convert multiple timestamps at once with bulk mode. Live clock shows the current Unix timestamp. No data leaves your browser — 100% client-side tool for developers.
How to Use
- Enter a Unix timestamp (seconds or milliseconds) and click Convert to see the date in UTC, local, ISO 8601 formats with relative time.
- Or pick a date and time and click Convert to get the Unix timestamp in seconds and milliseconds.
- Use Bulk Mode — paste one timestamp per line and convert them all at once.
- The live clock at the top always shows the current Unix timestamp.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (also called Epoch time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC. It is widely used in programming and databases to represent points in time.
What formats does this tool output?
For each timestamp it shows: UTC date, local date/time, ISO 8601 format, full date with day name, time, epoch in both seconds and milliseconds, and relative time (e.g., "3 days ago").
Does it support millisecond timestamps?
Yes. Select "Milliseconds" from the unit dropdown. Many JavaScript and Java systems use 13-digit millisecond timestamps instead of 10-digit second timestamps.
What are the use cases?
Debugging API responses with epoch timestamps, converting database timestamps for reports, verifying JWT token expiration times, analyzing server logs, and comparing timestamps across time zones.
Does the bulk converter preserve order?
Yes. Each line of input is converted in order, and the output shows the original timestamp followed by its human-readable equivalent on the same line.
Does it run in my browser?
Yes. Once the page loads, the tool runs entirely in your browser. No data is transmitted to any server — all conversions happen in your browser using JavaScript Date APIs.
Guides & Tutorials
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