Enter a timestamp or date
Paste a Unix epoch timestamp or select a date and time. The epoch converter automatically detects whether your input is in seconds, milliseconds, or microseconds and converts it accordingly.
Epoch Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and times, and convert dates back to timestamps. Supports seconds, milliseconds, and microseconds. See the converted result in multiple time formats including UTC, ISO 8601, and local time. Essential for developers working with APIs, databases, and log files.
Workspace
Use the tool below. Your inputs stay local when the tool supports browser-only processing.
Current Timestamp (ms)
1789555264911
Last reviewed: · Testing methodology
Workflow
How to use the Epoch Timestamp Converter
View converted results
See the converted result in multiple formats simultaneously: UTC, ISO 8601, local time, and relative time (e.g., '2 hours ago'). The epoch converter makes it easy to understand timestamps in whatever format you need.
Copy the result
Copy any of the converted formats to your clipboard. The epoch converter also shows the current timestamp and lets you convert dates back to Unix timestamps for use in API calls and database queries.
Convert Unix Timestamps Quickly
The epoch converter turns Unix timestamps into readable dates and converts dates back to epoch values. It supports common developer workflows involving APIs, logs, databases, and scheduled jobs.
Seconds, Milliseconds, and Time Zones
Timestamps may be stored in seconds, milliseconds, or microseconds. The converter helps identify the format and displays UTC, ISO, and local time views for easier debugging.
When Developers Need Epoch Time
Use epoch conversion when reading logs, checking token expiration, testing API responses, comparing database records, or preparing timestamp values for scripts.
How this tool works
The converter distinguishes seconds from milliseconds, creates a Date value, and formats equivalent representations locally.
- Engine: JavaScript Date and timestamp arithmetic
- Supported input: Unix seconds, Unix milliseconds, date and time values
- Output: ISO/local date display, Unix timestamp
- Input
- 0 seconds
- Output
- 1970-01-01T00:00:00.000Z
Limits, edge cases, and troubleshooting
Use UTC/ISO output for logs and APIs. If a result is thousands of years away, check whether the source value is milliseconds rather than seconds.
- Dates must fall within the JavaScript Date range.
- Ambiguous local times and daylight-saving transitions depend on the browser time zone.
When to use another workflow
Use a date-time library or database function for named time zones, calendar arithmetic, leap-second policy, or bulk conversions.
| Option | Best for | Trade-off |
|---|---|---|
| This browser tool | Quick, private, one-off work | Limited by browser memory and the documented feature set |
| Desktop or command-line tool | Batch jobs and repeatable automation | Requires installation and setup |
Verification
Reviewed by the Free Online Tools Nest Team on 2026-08-26. The interface, output path, and documented limitations were checked against the current implementation. See our testing methodology for the review process.
Read the testing methodologyEpoch Timestamp Converter — Frequently Asked Questions
What is a Unix epoch timestamp?
A Unix epoch timestamp represents the number of seconds (or milliseconds) that have elapsed since January 1, 1970 (midnight UTC). The epoch converter translates these numeric timestamps into human-readable date and time formats.
Does the epoch converter support milliseconds and microseconds?
Yes, the epoch converter supports timestamps in seconds (10 digits), milliseconds (13 digits), and microseconds (16 digits). It automatically detects the precision of your input and converts it correctly without manual configuration.