Timestamp Converter — Convert Epoch & Dates Instantly
Timestamps appear everywhere: log files use Unix epoch seconds, APIs return milliseconds or ISO strings, and you often need to switch between human-readable dates and numbers. A timestamp converter that runs in the browser lets you do that without leaving your tab or sending data to a server. You can see the current time in both epoch and ISO form, convert an epoch value to a date string, or paste a date and get back the epoch. That makes it easier to debug time-based logic, set expiry values, or explain a log entry to someone else. This tool updates the current time every second and supports both seconds and milliseconds, so you can work with whatever format your system uses. Developers and support teams often need to correlate events across systems that use different time representations; having one place to convert and copy timestamps speeds up troubleshooting and documentation.
What Does This Tool Do?
This tool has three parts: a live current-time block, an Epoch to Date converter, and a Date to Epoch converter. The current-time block shows the current moment as milliseconds, seconds, and an ISO 8601 string, and updates every second; you can copy that line for reference or paste into the converters. In Epoch to Date you enter a number (seconds or milliseconds since 1970-01-01 UTC) or the word "now", then click Convert. The tool shows the same instant as an ISO string and as a locale-formatted date and time. For numbers greater than 10^12 it treats the value as milliseconds; otherwise as seconds. In Date to Epoch you enter any date string the browser can parse (e.g. ISO 8601), click Convert, and get the epoch in both milliseconds and seconds. All conversions use the browser's Date object and run locally. The ISO output is always in UTC (Z suffix); the local output uses your system timezone so you can see what the time is where you are. Each result block has its own Copy button so you can grab just the value you need.
How to Use It (Step-by-step)
Use the Current time block to see the live epoch and ISO time; copy it if you need to paste it elsewhere.
For Epoch to Date, type a number (seconds or milliseconds) or "now" in the input, then click Convert. The result shows UTC ISO and local date/time.
For Date to Epoch, type a date string (e.g. 2024-01-15T12:00:00.000Z or a locale date) in the input, then click Convert. The result shows milliseconds and seconds.
Use the Copy button next to any result to copy it.
Use Clear all to reset every field when you're done. If a conversion fails, check that the epoch number is in range or that the date string is in a format the browser can parse.
Key Features & Use Cases
- Client-side only: no data is sent to a server.
- Live current time in ms, seconds, and ISO, updating every second.
- Epoch to Date: enter seconds or ms (or 'now') and get ISO and local date/time.
- Date to Epoch: enter a date string and get ms and seconds.
- Copy buttons for each result block.
- Debug log entries that only show epoch timestamps.
- Set or verify expiry (e.g. JWT exp) in seconds or milliseconds.
- Convert API response timestamps to a readable date for support or docs.
- Generate epoch values for rate limits or cache TTL in config.
- Interpret cron or scheduler values that use epoch.